Automobile Vibration
Automobile Vibration
(OP)
Do you know of a paper about the variability in natural frequencies of finished automobiles? I can't find any references to it, but I'd like to order it somewhere.
I think it was in the 1990's, and somebody actually tested about 170 similar cars to measure the first few fn's.
Tom Irvine
http://www.vibrationdata.com
I think it was in the 1990's, and somebody actually tested about 170 similar cars to measure the first few fn's.
Tom Irvine
http://www.vibrationdata.com





RE: Automobile Vibration
At one point Rover used to measure first torsion of every car on the production line!
Cheers
Greg Locock
RE: Automobile Vibration
"Variability of Interior noise levels in passenger cars"
by L.A. Wood and C.A. Joachim
ImechE 1984 paper C136/84
RE: Automobile Vibration
I believe I did read a similar paper many years ago, but this one was comparing the natural frequencies of japanese made cars to north american made cars and highlighted a trend of the north american car makers in following the japanese trend, in producing cars with increasingly higher natural frequencies. I'll search through the archives to see if i can't find the article. If I do I will pass it along...no garantees though, it's been quite awhile since I read this one!
JMacK
RE: Automobile Vibration
This may help
13. Kompella, M., and Bernhard, R.J., “Measurement of
the Statistical Variation of Structural-Acoustic
Characteristics of Automotive Vehicles.” SAE Noise
and Vibration Conference, 931272, Traverse City,
1993.
I am awaiting a copy of this. It will probably be at higher frequencies than first bending etc.
Cheers
Greg Locock