The Use of Frequency Domain Vibration Methods for Automotive Component Durability

Paper #:
  • 960971

Published:
  • 1996-02-01
Citation:
Lin, J., John, C., and Luft, P., "The Use of Frequency Domain Vibration Methods for Automotive Component Durability," SAE Technical Paper 960971, 1996, https://doi.org/10.4271/960971.
Pages:
11
Abstract:
A simple CAE method of predicting the performance of a component during sine testing has been developed and applied to the practical case of an automotive component. The slow frequency sweep rate during a test is represented as a sequence of steady state conditions. Direct frequency response analysis at the limited number of frequencies is conducted and results used as a basis for prediction of fatigue damage using the Palmgren-Miner rule. The total damage during the test is calculated by linear summation of the damage during each frequency interval. This technique is completely general and can be applied even if there are multiple inputs to the component. A simple extension enables application to engine testing and other cases where excitation may be expressed as a Fourier series expansion of periodic excitations.
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