APPENDICES A AND B INVESTIGATION OF PRESENT AND FUTURE VIBRATION ENVIRONMENT

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A000800020087-0
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 110
• Document Creation Date: December 28, 2016
• Document Release Date: August 30, 2012
• Sequence Number: 87
• Publication Date: June 1, 1971
• Content Type: MISC

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UNITED STATES GOVERNMENT
WASHINGTON, D.C.
APPENDICES A AND B
INVESTIGATION OF PRESENT AND FUTURE
VIBRATION ENVIRONMENT
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TABLE OF CONTENTS
APPENDIX A
DATA AND DETAILED DESCRIPTIONS
OF EACH GROUP OF MEASUREMENTS
LOCATION AND DESCRIPTION OF VIBRATION DATA
F Olt PLANS SP^"ING LOCATION OF MEASUREMENTS
V LiRATION RECORDS
COMPUTER INPUT
COMPUTER OUTPUT
DISCUSSION OF VIBRATION DATA
APPENDIX B
ADDITIONAL COMPUTER RUNS
EFFECT OF INPUT
AT RESONANT FLOOR FREQUENCIES
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APPENDIX A
DATA AND DETAILED DESCRIPTIONS
OF EACH GROUP OF )1EASUREtENTS
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LOCATION AND DESCRIPTION
OF VIBRATION DATA
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LOCATION AND DESCRIPTION OF VIBRATION DATA
LOCATION A
Imbient vertical and horizontal (west) floor vibrations were
recorded in Room 1N427-N. These data are documented as Record 1. The
top trace represents vertical motion and the bottom horizontal notion
near the center of the bay bounded by Column Lines 7 and 8 and Column
Lines G and H.
LOCATION B
Ambient vibratory motions of the foundation block located in
th room (first floor) were recorded at various positions on the
fours at on co evaluate vertical, translational and rocking motion. Data
were also recorded on the foundation and the adjacent floor to evaluate
the ambient motion of the foundation with respect to the floor. These
data are documented as Records 2 through 9. A dese.iption of each record
is as follows:
Record 2 - Vertical vibratory motion of the northeast (top
trace) and northwest (bottom trace) corners of the foundation.
Record 3 - Vertical vibratory motion of the northeast (top
trace) corners of the foundation.
Record 4 - Vertical motion of the northeast (top trace) and
southeast (bottom trace) corners of tbs foundation.
Records 5 and 6 - Vibratory notion of the foundation block and
the adjacent floor were recorded at the northeast corner of
the foundation. The top trace represents the vertical move-
ment of the foundation and the bottom trace the vartical Uova--
ment of the floor. Record 6 is a repeat of Record S with the
velocity transducers interchanged to ch4-zk that they are func-
tioning properly.
Record 6a - Same as Record 6.
Record 1 - Horizontal vibrations in the ncrth (top trace) and
east (bottom trace) directions were recorded at the centerline
of the north end of the foundation block.
Record 8 - Horizontal vibrations of the foundation block and
the -floor were measured and recorded. The top trace is a
record of vibratory motion of the foundation block in an
easterly direction. measured at the center of the north end
of the block. The floor horizontal motion (bottom trace) in
ou Masterly dlreetion waK meaiired at the northeast corner of
the f11U1:(II(t irli.
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Record - Same AP Record 8, except that the motions were
recorded in a ncrtherly direction.
LOCATION C
Vibrations were measured in the room where the Fastran Mass
Storage Units are located. Records 10, 11, 12 and 13 were taken at the
southeast corner of the unit adjacent to (!-11* in these records,
the top trace is vibration of the floor and the bottom trace of the unit.
Record 10 - horizontal vibrational were recorded in a westerly
direction. Monitoring the vibrations prior to obtaining
a record indicated that Record 10 is a transient vibration
and not typical of the ambient vibrations.
Record 11 - Same as Record 10, except that it is a measure
of ambiennt vibration.
Record 12 - Same as Record 11, except that the horizontal
vibrations are in a northerly direction.
Raton: 13 - Same as Record 11, except that vibrations are
measure in the vertical direction.
LOCATION A
Ambient floor vibrations were recorded on the first floor corridor
at the north end of the building in the bay bounded by Column Lines 1 and 2
aid Column Lines F and G. These measurements are documented as Rs^orda 14
through 18.
Record 14 - Ambient floor vibrations were measured near Column F-1
(top trace) and at approximately aid-bay (bottom trace) in the
vertical direction.
htcord 144 - Same as Record 14.
Record 15 - F!.oor vibrations were measured in the vertical
(top 4race) ar4 horizontal (bottom trace) directions near
Column F-1. The direction of the transducer for the horizontal
vibration was to the north.
Record 16 - Same as Record 15, except the direction of the hori-
zontal (bottom trace) tranadu%er was to the west.
Record 17 - Ambient horizontal vibrations (north) were measured
near Co Column F-1 (top trace) and at approximately mid-bay (bottom
trace).
Record 1S - Same as Record 17, except the direction of the trans-
ducer8 to the east.
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LOCATION E
Ambient floor vibrations were recordad on the first floor corridor
at the south end of the building in the bay bounded by Column Lines 18 and
19 and Column Lines J and K.
Record 19 - The top trace of the record represents vertical
vibration at approximately mid-bay. The bottom trace is hori-
zontal vibration at approximately rid-bay in & .northerly direction.
Record 20 - ~%me as Record 19 except the horizontal direction
was to the east.
LOCATION F
Floor and equipment vibrations were measured at the north end of
the clean room (2N420-A) bounded by Column Lines 3 and 4 and Column Lines A
and 8.
RecorO 21 - While equipment was turned off, vertical measurements
ttop trace) were recorded on the floor adjacent to the Densitometer
and on top (bottom trace) of the Densitometer glas3 plate.
Record 22 - Same as Record 21 with equipment turned on.
Record 23 - Vertical measurements were recorded on the base
plate top trace) of the Densitometer and on top of the glass
plate with the equipment on.
Record 24 - Same as Record 23 except the vertical measurement
represented by the bottom trace was taken atop the Densitometer
table with the equipment off.
Record 25 - Same as Record 21.
LOCATION G
Ambient floor and equipment vibrations were recorded in the Enlarge-
ment Room located on the second floor near Column A-17.
Record 26 - Vertical floor vibrations were recorded at Column A-17
and approximately 6 feet from Column A-17. The top trace represents
motion at the column and the bottom trace motion 6 feet from the
column.
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LOCATION H
Floor and equipment vibrations were recor'. 'e;; in 'be second floor
Mensuration Area, Room 2N620. These vibrations are '.ocwnente~l es Records
28 through 39.
Record 27 - Vertical vibrations were recorded on top of the paper
support (top trace) and near the lens (botton trace).
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Record 28 - Vertical floor vibrations were recorded at Column
H-5 (top trace) and at approximately mid-bay (bottom trace)
with all equipment turned off.
Record 29 - Same as Record 28.
Record 30 - Vertical vibration (top trace) and horizontal
vibration (bottom trace) in a northerly direction were recorded
on the floor at Column H-5 with all equipment off.
Record 31 - Sap-* as Record 30, except that the direction of hori-
zont al transducer was to the east.
Record 32 - Same as Record 31 except that all equipment was turned
on.
Record 33 - Same as Record 28 except that all equipment was turned
on.
Record 34 - Vertical vibrations were measured at Column H-5
(top trace) and on the main lower frame of a :Mensuration Unit
(bottom trace). Both traces were recorded with all equipment
on.
Record 35 - Same as Record 34 except the direction of vibration
oTthe bottom trace which is horizontal to the north.
Record 36 - Same as Record 35, except that the horizontal direction
bottom trace) is to the east.
Record 37 - Same as Record 35 except that all equipment was turned
off.
Record 38 - The natural frequency of the floor system was approxi-
mated by thumping the floor to excite the system and is represented
by the vertical vibration recorded on the top trace with the velocity
transducers located at approximately mid-bay. The bottom trace repre-
sents vibration recorded in the same direction and location as
Record 37.
Record 39 - Same as Record 38 except that the horizontal direction
(bottom true) was to the east.
LOCATION I
Floor vibrations were recorded in the second floor Mensuration Areal
Room 2N621.
Record 40 - Ambient vertical vibration (top trace) and ambient
horizontal vibration to the north were recorded at approximately
mid-bay.
Record 41 - Location and direction the same as Record 40. The
floor was thumped and its natural frequency recorded.
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Floor and equipment vibrations were measured on the fourth floor
in Room 4N411-I.. records 42 through 47 were taken with the table in the
down position.
Record 42 - The floor system bounded by Column Lines 2 and 3
and Column Lines F and G was excited by thumping the floor
and the approximate natural frequency recorded. The top trace
represents the response in the vertical direction and the bottom
trace in the horizontal direction (north). both velocity trans-
ducers were located at approximately aid-bay.
Record 43 - Same as Record 42 except that ambient vibrations were
recorded.
Record 44 - Same as Record 43 except that the horizontal direction
(bottom trace) was to the east. Ambi.nt vibrations were recorded.
Record 45 - Floor vibration in the vertical direction (top trace)
was recorded at approximately mid-bay. The bottom trace velocity
transducer was placed on top of the glass of the latest model port-
able light table and vertical vibration was recorded to evaluate
magnification of vibration from the floor system to the top of the
light table. The light table was located at approximately aid-bay.
The light table fan was turned off to eliminate the high frequencies.
Record 46 - Vertical vibrations (top trace) were recorded stop
the light table binoculars. The bottom trace is the sage lo-
cation and direction as the bottom trace in Record 45. The
light table fan was off.
Record 47 - Horizontal vibrations were recorded in the same
locations &-a Record 46. The orientation of the velocity
transducers was to the front of the light table which corresponded
to building north.
Record 48 - The table was raised and a counterweight was added
to the beam which supports the binoculars. Vertical vibrations
were recorded on top of the optical arm (top trace) and on top
of the binoculars (bottom trace).
LOCATT',N K
Floor vibrations were '''.ured in the fifth floor Mensuration
Area Cleau Room bounded by ^:uiumn Lines 9 and 1J and Column Lines H and J.
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Record 49 - Ambient vertical floor vibrations were recorded
adjacent to Column J-9 (top trace) and at approximately mid-bay
(bottom trace).
Record 50 - The location and orientation of tt.e transducers was
t}r same as Record 49. The floor was thumped and the resulting
response of the floor system recorded to approximate the
no ture l frequency of the sys teem.
RecoW rd 51 - Ambient vertical vibration (top trace) was recorded
at approximately mid-bay and horizontal vibration (bottom trace)
in a northerly direction at the same location.
Record 52 - Same as Record 51 except that the horizontal direction
bottom trace) was to the east.
LOCATION L
Floor vibrations were recorded in Room 55515-F (fifth floor).
Record 53 - Ambient vertical and horizontal floor vibrations
were recorded at approximately mil-bay. The top trace represents
the vertical vibration and the bottom trace the horizontal
vibration in the northerly direction.
Record 54 - Saw.' as kecord 53 except that the ambient horizontal
vibration was recorded in an easterly direction.
Record 55 - Location and direction of the measurements are the
san as Record 54. The floor system was excited by thumping
the floor to approximate the natural frequency of the system.
LOCATION N
4S452-G.
Floor vibrations were recorded on the fourth floor in Room
Record 56 - The natural frequency of the floor system was approxi-
mated by thumping the floor and recording the response. Vertical
floor vibration (top trace) was recorded at approximately mid-bay
and horizon --! floor vibration (bottom trace) was recorded in a
northerly direction at the same location.
Record 57 - Ambient floor vibrations were recorded in the same
direction and location as Record 56.
Record 58 - Same as Record 57 except that the horizontal lirection
was to the east. Ambient vibrations were recorded.
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LOCATION N
Floor vibrations were recorded on the third floor ir. Room 3S316-C.
Record 59 - Ambient. floor vibrations were recorded at approximately
mid-bay in the vertical direction (top trace) and a northerly
direction (bottom trace).
Record 60 - Same an Record ;cept that the direction of the
horizontal velocity transducer was to the east.
Record 61 - The natural freq'jerky of the floor syster was measured
in the same direction And location as Record 60.
LOCATION 0
Floor vibrations were recorded on the thud floor at approximately
mid-bay between Column Lines 4 and S and Column Lines F r.'d G.
Record 62 - Ambient v5brattions ware recorded in the vertical
direction (top trace) and in t?he horizontal direction (bottom
trace) to the north.
Record 63 - Sant as Record 62 except that horizontal direction
was to the east.
Record 64 - The natural frequency of the floor system was measured
in the same direction and locatior as Record 63.
Floor and equipment vibrations were recorded ca the fourth floor
in Room 4N806-B.
Record 65 - Ambient floor vibrations were reco':ded at approximately
mid-bay in the vertical direction (top trace) and in a northerly
direction (bottom trace).
Record 66 - Some as Record 55 except that the horizontal direction
is to the east. J_
Record 67 - The natural frequency of the flo~,r system was measured
in the same direction and location as Record 66.
Vibrations measurements were taken on top of the slab (rock) of the
optical benches and the isolation baso or floor to measure the effectiveness
of the Barry Isolation Mounts. ."hese measurements are documented as Records
68 through i3.
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Record 68 - Vertical vibrations were mensurcd on top of the
xlab a4-on the taolatto n bare with the air mounts on. The
top trace represents the vibrutiont of the slab and the bottom
trace the base of the isolation mount.
Record 70 - Sane as Recorc. 68 except that the air mounts were
off.
Record 71 - Same as Record 68 except that the vertical rran',-
ducer, which measured the vibration of tie isolation base (bottom
trace), was placed on the floor ti,'nediatc'ly adjacent to the air
mount. Note that air mounts were on.
?ecord 72 - Same as Record 71 except that the vibration was
measured in the horizontal direct:'.on to the west.
Record 73 - Same as Record 72 except that t'te direction of the
Ee,uipment vibrations were recordei on the fourth floor in Room
4N806-C to !valuate the effectiveness of the isolation mounts.
Record 74 - Vertical vibrations were recorded on the upper and
lower slabs with the air mounts on and the auxiliary bench
attached. The lower slab is mounted on pads and the air
motncs are locAted between the upper and lower slab. Th3
records were made on the corner closest to Column K-2. The
upper trace is a record of the ambient vertical vibration
of the upper slab and the bottom trace and the ambient vertical
vibration of the lower slab.
Record 75 - Some as Record 74.
LOCATION R
Floor vibrations were measured on be fourth floor in Room 4S473-H.
Record 76 - Ambient floor vibrations were recorded in the center
of the bay bounded by Column Lines 16 and 17 and Column Lines
J and K. The top trace is a record of the vertical vibration and
the bottom trace horizontal vibration in a northerly direction.
Record 77 - Sam& as Record 76 except that the horizontal direction
is to the east.
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Record ?8 - The direction and location of the velocity transducers
were the same as Record 77. The floor system was excited by
thumping the floor to measure the necural frequency of the
syq:em.
Record 79 - Ambient floor vihr:itionq were meas+ired in the
vertical direction (top t+.ace) and the horizontal direction
(bottom trace) In a northerly direction. Both velocity
transducers were locat.d mid-way between Column Lines 16 and 17
and approximately 4 feet east of Column Line J.
Record 80 - Same as Record 79 except that the horizontal
direction was tJ the east,
LOCATION S
Floor vibrations %'ere measured in Room 45473.4 at the wall
along Column Line 18 approximately mid-way between Column Lines J and K.
Record 81 - Ambient vertical floor vibration (top traci) and
ambient iiorizontal floor vibration (bottom trace) in a
northerly direction were measured.
Record 82 - Same as Record 81.
Record 83 - The direction and location of the velocity trans-
ducers were the same as Record 82. The floor was thumped, and
the natural frequency of the floor system recorded.
LOCATION T
Floor vibrations were measured at the wall along Column Line K
mid-wa1 between Column Lines 18 and 19.
Record 84 - Ambient vertical floor vibration (top trace) and
ambient horizontal floor vibration (bottom tiac~i) in a northerly
direction were measured.
Record 85 - Same as Record 84.
Record 86 - The direction and location of the velocity trans-
ducers were the sage as Record 84. The floor was thumped to
measure the natural frequency of the floor system.
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LOCATION U
Vibration of the heating unit located in Room 4S475-C was
measured while the fan was in operation.
Record 87 - The vertical vibration of the hea'.ing unit base (top
trace) was measured. The bottom trace represea*a horizontal
vibration in an easterly direction of the side of thi heating
unit nearest Column Line 20.
Record 88 - The velocity transducers were held on the heating unit
bearing housing. The top trace is a record of vertical vibration
and the bottom trace horizontal vibration in an easterly direction.
LOCATION V
Floor vibrations were measured in a fifth floor room aL ng Column
Line G and approximately mid-way between Column Lines 2 and 3. The room
is immediately adjacent to the northern-most vertical air duct.
Record 89 - Ambient vertical vibration and ambient horizontal
(nc,rth vibration were recorded at the location described above.
The top trace represents the vertical vibratory motion and the
bottom the horizontal.
Record 90 - Same as Record 89 except that the horizontal. direction
was to the east.
Record 91 - Location and direction of the velocity transducers
were the same as Record 90. The floor was thumped to obtain
the natural frequency of the floor system.
LOCATION W
Floor and wall vibrations were recorded cn he third floor in
Room 3S436-C in the vicinity of Column Line G-13 and the vertical air duct
on the west wall with the air system in operation. All measurements re-
cirded are considered to be representative of the ambient vibrations in this
area.
Record 92 - Vertical (top trace) and horizontal (bottau trace)
vibrations were recorded on the floor ajdacent to the north end
or side of the vertical air duct. The direction of the horizontal
vibration is tv the north.
Record 93 - Same as Record 92 except that the horizontal direction
was to the east.
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Record 94 - The vertical veloc!"y pickup (top trace) van in the
sane location as Record 92. The bottom trace represents hori-
zontal vibratory motion of the northern air duct wall at approx-
imattly aid-height.
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Record 95 - Top trace asme as Record 92. The bottom trace
represents horizontal vibration of the inside of the corridor
wall (west end of room) at approximate mid-height.
Record 96 - Top trace same as Record 92. The bottom trace is a
record of the horizontal vibration of the front of the air duct
wall at approximately mid-height.
Record 97 - Tip trace same as Record 92. The bottom trace is a
record of the horizontal vibration of the west face of Column
G-13 approximately two feet below the ceiling.
Record 98 - Top trace same as Record 92. The bottom trace is a
record of the horizontal vibration of the north face of Column
G-13 approximately two feet below the ceiling.
LOCATION X
Floor ane wall vibrations wee recorded on the third floor in
Room 3S436?.D near and on the north wall mid-way between Column Lines G
and H. Only the horizontal wall vibration (bottom trace) documented in
Record 103 is not at this location; its location is the south wall. All
wall vibrations were taken at mid-height of the room.
Record 99 - Ambient vertical (tnp trace) and horizontal vibrations
(bottom trace) were recorded at the location described above. the
;arizontal direction was to the north.
Record 100 - Same as Record 99 except that the horizontal atrectioo
was to the east.
Record 101 - The location and direction of the velocity trans-
ducers were the same as Record 100. The floor was thumpei ail the
natural frequency of the floor system measured.
Record 102 - Top trace same as Record 99. The bottom trace
represents horizontal vibratory motion of the north wall.
Record 103 - Top trace same as Record 99. The bottom trace
represents horizontal vibraticn of the south wall.
Record 104 - Both horizontal velocity transducers were placed
against the north wall of the room as a cheek on their calibration.
The o and/or resulting vibration of operating
equipment hoes were recorded.
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Record 105 - Vertical (top trace) and horizontal (bottom trace)
vibrations (perpendicular to compressor drive) induced by a
DeVilbiss compressor were recorded. The velocity pickupe, were
placed on the compressor base and t:,? t ecords taken
while both compressors were in
Record 106 - The same measuremar,` taken on Bass A-4-5 were :aken
on Base A-4-6 while both compressors were in opo:ration.
Record 107 - The same measurements were taken on Base A-4-4
(base of a Worthington compressor).
LOCATION - BUILDING PARKING AREA
Ambient ground vibration wap recorded near tho guard shack at
fl,e nnr~k...~...? .___
Record 108 - The top trace represents vertical vibratory motion
And the bottom horizontal (north) with the horizontal pickup
oriented in a radial direction with respect to the source of
vibration (vehicular traffic on M Street).
Record 109 - Same as Record 108.
Record 110 - Sa^^ es Record 108 except that a heavy bus passed.
Record 111 - Same as Record 108, except that the horizontal
velocity transducer was oriented transverse with respect to the
source of vibration.
LOCATION
Vibration measurements of operating equipment were recorded
in Building 213A.
Record 112 - Vertical vibration (top trace) and horizontal
vibration (botre:a trace) in a northerly direction were recorded
on north face of Air Handling Unit No. 2 fan housing.
Record 113 Vertical vibration (top trace) and horizontal
v;bration (tottom trace) in a northerly direction were re-
corded on the north side of the duct work attached to the
fan housing.
Record 114 - Vertical vibration (top trace) and horizontal
vibration (bottom trace) in a northerly direction were
recorded on the north face of Air Handling Unit 2E Supply
Room Air. The duct where the measurements were taken is
part of the enclosure for a fan.
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Record 115 - Vertical (top trace) and horizontal (bottom
trace) vibrations were recorded on Unit 2E Supply Equipment
Air Duct (north side of Supply Room Air). The direction of
the horizontal velocity pickup wz;, to the northeast.
Records 116 and 117 - Vertical (top trace) and horizontal
- -------------- -- --ib-r-
(bottom trace) vibrations in a southerly direction were
recorded on the south face of Air Handling Unit No. 2.
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Record 118 - Vertics.l (top trace) and horizontal (bottoru
trace) vibrations were recorded on the north face of Air
Handling Unit No. 1. The direction of the horizontal velo-
city pickup was to the north.
Record_ 119 - Sane unit as in Record 118. Horizontal vibration
(bottom trace) and vertica'. vibration (top trace) measurements
were taken on the eas.. face. Orientation of the horizontal
pickup was to the east. The Worthington air compressoi wis
on.
Record l_?0 - Same as Record 119 with the Worthington air
compressor off.
Record 121 - Vertical (top trace) and horizontal (bottom
trace) vibrations were recorded on the east face of the
Air Handling Unit located at the south end of the buiiding.
The horizontal velocity tranFduc?r was oriented to the east.
Record 122 - Same as Record 121.
Record 123 - Same unit as in Record 121. The measurements
were takes on the east face. The top trace represents
vertical vibratory motion and the bottom horizontal vibration
to the east.
Note: The numbering of the records stops at Record 123 an: begins again
with Record 200. Numbers 124 through 199 were not used.
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LOCATION RCI
Floor vibrations were measured on the fifth floor in Room 58316-A
at the ,pproximate center of the bay bounded by Column tines 13 and 14
and Column Lines D and E. The top trace represents vertical vibration
and the bottom trace horizontal vibration in a westerly direction in
Records 200 through 211.
Record 200 - Ambient vibration was recorded.
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Record 201 - S. as Record 200.
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Record 202 - Same as Record 200.
Record 203 - Jaw-type Rock Crusher on but empty.
Record 204 - Jaw-type Rock Crusher on with rock.
Record 205 - Same as Record 204.
Record 206 - Roller-type Rock Crasher on but empty.
Record 207 - Roller-type Rock !;rusher on with rock.
Record 208 - Same as Records 200, 201 and 202.
Record 209 - Ro-Tap Sieve Shaker on.
Record 210 - Table on sixth floor struck with sledge hai er.
Record 211 - The fifth floor was thumped and the natural
frequency of the floor system measured.
LOCATION RC2
Floor vibrations were measured on the fitth floor at the
bay bounded by Column Lines 14 and 15 and Column Lines C and H. The
top trace represents vertical vibration and the bottom trace horizontal
vibration (westerly direction) in Records 212 through 216.
Record 212 - Ambient floor vibration was recorded.
Record 213 - Jaw-type Rock Crusher on with rock.
Record 214 - Roller-type Rock Crusher on with rock.
Record 215 - Same as Record 214.
Record 216 - Same as Record 212.
LOCATION - PARKING LOT AREA
Ambient vibration was recorded near the guard shack at the
Record 217 - The top trace represents vertical vibration and
the bottom horizontal (north) with the horizontal velocity
transducer oriented in a radial direction with respect to the
source of vibration (vehicular traffic on N Street).
Record 218 - Same as Record 217 except that a bus passed.
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
Record 219 - Same as Record 218.
Record 220 - Train passed on First Street, The location and
direction of the velocity tranducers vere the same as Record 217.
LOCATIONS - Al AND A2
Vibration was measured on the fifth floor in the vicinity of
the vertical air shaft located at the north end Ati
Location Al, the measurements were taken on the floor adjacent the wall
of Room 5N415-D. At Location A2, the measurements were taken on the wall
of the air shaft.
Record 221 - Vertical vibration (top trace) and horizontal
vibration (bottom trace) in a northerly direction were
recorded at Location Al with the tan on.
Record 222 - Same as Record 221 except that the horizontal
direction was to the east.
Record 223 - Vertical vibration (top trace) and horizontal
vibration (bottom trace) in a northerly direction were
measured at approximately mid-height of the wall (Location
A2) with the fan on.
Record 22' - Some as Record 223.
Record 225 - Same as Records 223 and 224 except that the fan
was off.
.Record 226 - Same as Record 221 except that the fan was off.
Record 227 - Same as Record 226.
LOCATION - COOLING TOWER
Vertical and horizontal vibration messtrements were taken atop
the cooling tower unit closest on the circular frame at
the top of the tower. The top trace represents vertica? '?'bratory motion
and the bottom trace horizontal vibration with the cooling tower fan on.
Record 228 - Horizontal vibration radial with respect to the
source of vibration (cooling tower fan).
Record 229 - Horizontal vibration transverse with respect to
the source of vibration (cooling tower fan).
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 Declassified in Part - Sanitized Copy Approved
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I
LOCATION III
Vertical rand horizontal (north) floor vibrations were measured
at the base of the east corridor wall near Room 4N435. These drta are
documented as Record No ;.45. The top trace represents vertical vibratory
motion and the bottom trace horizontal vibration. These measurements were
taken with the air system on. Record No. 256 is the same measurements taken
with tht air system for off (specifically, the supply air,
return air and vertical risers were off). Note, however, that the USGS
(sixth floor) air system and the 4SE supply fan were on.
Vertical and horizontal (north) floor vibrations were recorded
at the base of the easy corridor wall apposite Room 4S452. The top trace
of Recird 246 represents vertical vibration and the bottom grace horizontal
vibration in a northerly direction with the air system on. Record No. 257
represents the some vibrations at the same location with the air system off
(supply and return air off and vertical risers off). The USGS (sixth floor)
air system and 4SE supply fan were on.
LOCATION V
Vertical and horizontal (north) floor vibrations were recorded
at the base of the east corridor wall near Room 4S463. The top trace of
Record No. 247 represents vertical vibration and the bottom trace horizontal
vibration in a northerly direction aith the air system on. Record No. 258
represents the same vibrations at the same location with the air system off
(supply and ret?or,i air off and vertical risers off). The USGS air system
ana the 4SE supply fan were on. Record No. 259 is the same as Record No.
258 except that the USGS air system and the 4SE supply fan were off.
OCATION VI
Vertical and horizontal (north) floor vibrations were measured at
the north end of the fourth floor corridor at approximately mid-bay (bay
bounded by Column Lines 4 and 5 and Column Lines F and G). The top trace
of Record No. 2138 represents vertical vibration and the bottom trace hori-
zontal vibration in a northerly direction with the air system on. Record
No. 252 represents the same vibrations with the air system off (supply and
return air and vertical risers off). The USGS sir system and 4SE supply fan
were on. Record No. 253 is the same as Record No. 252 except that the hori-
zontal direction was to the west.
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
Vertical and horizontal (north) vibrations were measured neat the
east corridor wall (at approximately mid-bay of area bounded by Column Lines
6 and 7 and Column Lines F and G). These data are documented as Record No.
249. The top trace represents vertical vibration and the bottom trace hori-
zontal vibration in a northerly direction with the air system on. Record
No. 250 is a repeat of Record No. 249. Record No. 254 represents the same
vibration at the Fame location with the air system off (supply and return
air and vertical risers off). The USGS air system and the 4SE supply fan
were on. Record No. 255 is a repeat of Record No. 254.
LOCATION Vt T
Vertical and horizontal (north) f:nor v1'drat!ons were measured at
the base of .he ea,;t corridor wall opposite room 4S470. The top trace )f
Record No. 251 represents vertical vibration and the bottom trace horizontal
vibration it' a northerly direction with the air Ey.3tem on. Record No. 250
represents the same vibration at the same location with c1? etc Lydtems off
as in Record No. 259.
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WASHINGTON, 0 C,
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UNITED STATES GOVERNMENT
WASHINGTON, D. C.
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UNITED STATES GOVERNMENT
WASHINGTON, D.C
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WASHINGTON, D.C.
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
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UNITED STATES GOVERNMENT
WASHINGTON, D C.
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
DISCUSSION OF VIUATION DATA
vibration measurements of building and process equipment housed
/
Subsequent to discussions concerning the sources of .ration in
the text of tbs report. the following sections summarize the results of
A detailed discussion of vibration measurements of the newest model
work bench was included in the text of the report and hence, is not included
herein.
Vibration Measurements of the Foundation Block
First Floor
Measurements were made of the vibrations of a newly constructed
equipment foundation located in the NRI Room. Records Nos. 2, 3 and 4
represent ambient vertical vibration measured at different locations -it'p
the foundation. In these records, the top trace represents vibratory motion
of the northeast corner of the foundation and the bottom trace the northwest,
northeast and southeast corners f',r Records Nos. 2, 3 and 4, respectively.
The scale is the same for both traces in each record and for all three
records; therefore, direct comparisons can be made. It can be seen that
the vertical vibratory motion of the top of the foundation is essentially
uniform.
Records Nis. 5, 6 and 6a are comparisons of the vertical vibrations
of the foundation and vertical vibrations of the floor. The top trace in
Record No. 5 and the bottom traces in Re.:ords Nos. 6 and 6a correspond to
vibrations of the top of the foundation. Both traces in each record are
the some scale and indicate that the foundation is amplifying the motion over
thin observed for the flop- presumably in response to the same source of
vibration. Recognizing the fact that additional mass will be added to the
system when the equipment is installed, it is questionable whether this
added mass will reverse the tendency of amplification of motion to one which
serves to isolate the equipment from the vibration source.
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STAT
STAT
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
16cord Ib. 7 raprsa?lts horirostal swtios of the foundation Le the
north and east directionis.' The bottom trace indicates that the suelitude of
vibration in as easterly direction is somewhat greater than the aortl;-rly
direction at essentially the same frequency.
Records Not. 8 and 9 represent horizontal vibrations of the founda-
tion (top trace) and the floor (bottom trace). Record No. 8 is vibratory
motion in an easterly direction ard Record N). 9 a northerly direction. As
observed for the vertical vibration, the traces indicate that notion of
the foundation in the horizontal direction is greater than that of the floor.
The scale settings for the top and bottom traces are the same for both
recordv, and therefore, the amplification of potion is readily seen.
Fastran X-_ce ctoraja Units. First Floor
Vibrations were measured in the room where the Fastran Mass Storage
Units are located to compare motion of the units to that of the floor. Records
Nos. 10, 11, 12 and 13 were taken at the southeast corner of the unit, which
is oriented in an east-west direction immediately, adjacent to Column C-11.
In these records, the top trace represents vibration of the floor and the
bottom trace the top of the unit. It might be noted that a visual check
of the vio.-?ton :races on the oscilloscope were made on two units stored
between the unit i.n which the subject records were made and Column Line 12
(back wall of the room). The vibration levels of all three units are approxi-
mately the same with the unit on which the records were made being slightly
higher. All three units were observed to be in phase.
Records Noe. 10 and 11 represent vibratory motion in a ,wrirontal.
direction to the west, Record No. 10 being a transient O.hration and accord
No. 11 a typical ambient vibration. Records Nos. 12 and 13 represent hori-
zontal vibration in a northerly direction and . vsrtic,%1 .iirection, respectively.
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Mote that the sensitivity of the bortsostal seals of the oscillssaoo ter
Record No. 12 is considerably greater then that of the other records.
Collectivelyo the traces indicate that the vibration level'4 of
the units and the floor are essentially the am* with the amplitude of
nation being greater for the floor. floor vibration is generally the came
as that observed at other locations on the first floor; therefore, the units
were dismissed as a significant source of vibration.
Dens itometerL Roar 2N420-A
Record No. 21 represents vertical vibration of the floor adjacent
to the Densitometer and on top of the Densitometer glass plate. The top
trace which represents floc- vibration and the bottom scale which represents
vibration of the slave plate are at the same scale setting and can be cosy
pared directly. With the equipment turned off, the traces indicate that
the glass plate vibrations are greater than the floor. Note that in be
computer output, the higher frequency was determined and not the predominant
frequency which is essentially the same for the floor and the glass plate.
Record No. 22 is the same as Record No. 21 except that the equip-
Went was turned on. The scale settings on the oscilloscope are the same
for both traces. Amplification of motion is not as teadily seen as when
the equipment is turned off; however, when the vertical vibrrti(m of the base
of the Densitometer is compared to that of the top of the glass,as seen in
Record No. 23, the top trace represents the base vibration, the aplificaticn
of motion is more notic.able.
Records Has. 24 and 25 were made with the equipment off. Record
No. 24 compares the vertical vibration of the base plate with that of the
top of the table. The amplitudes of vibration are comparable, but the
base plate is vibrating st a such higher frequency than the top of the
table, 60 Hs to 24 Hs, respectively.
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 Declassified in Part - Sanitized Copy Approved for Release 2012/08/30: CIA-RDP79B00873A000800020087-0
Record No. 25 is the sale ere Record No, 21. Note that the scale
is ,.Ot the same for the two records; however, it is the save for both traces
of ?.ecord No. 2. and it can he seen that the vibration of the glans
plate is coneidcrably gt