Page 1 - Combined_170_OCR

INTER COMPANY CORRESPONDENCE

TO - NAME DEPT. DIVISION PLANT/OFF1CE
'H. P. Bruns
FROM - NAME DEPT. DIVISION PLANT/OFFICE
W. P. Wright

SUBJECT:
Analysis of Vibration Data From Talladega Test

The vertical and lateral acceleration data recorded on 1/2 inch magnetic tapes

during theJime tests at Talladega, 20 - 25 August 1969, indicated that the ^vibration
of 7*C.7 /7 m, / /,r'
I

some body organs^ Visual analysis of the data stripped out on the Brush pen recorder

confirmed that all the factors were present. It is however, not practical to correlate
<*T 3
completely such data by handy^nethods,

been working with neering pn a computer
Jz \

program to /reduce such data aj\d establish definite correlations w£ it b ody related data, \

operated, and provided the necessary^omputer-4ime-4©

/
The results are plotted in Figure 1 o The solid lines represent th^Tulladega

test vibration data, the dotted linesxrepresent vibration data limits established by
4^f-l \ / \ / \
■i ____ during tests 'of human subjects to establish acceptable tolerance

■ j L -c.
limits for-th£ Air Force. ,„ ,,
fe So f? ■ -
•
*
' ■ - F /
The Talladega test data correlates with data md indicates
/ i /
that vehicle vibratioh inputs to the drivers seat are capable of exciting tie resonant
;he resonant
. I \ / \ / V \7 \
V L
\Z| V/
, z v /
Lrpquenctes of body organs such as the chest cavity, head, eyeballs, heart, and lungso
It must be noted that the accelerometers were located on the roll cage at seat
level just behind the driver and doe^ not measure the actual inputs to the drivers

spinal column (the critical inputl^may vary somewhat due to seat structural

84- 1 10-7879 REV. 1-63