On Body Mount Crash Characteristics

Paper #:
  • 1999-01-3186

Published:
  • 1999-09-28
Citation:
Huang, M., "On Body Mount Crash Characteristics," SAE Technical Paper 1999-01-3186, 1999, https://doi.org/10.4271/1999-01-3186.
Author(s):
Pages:
15
Abstract:
This paper reports a study of the impact dynamic characteristics of body mounts in a body-on-frame vehicle. Two methods of dynamic analyses are utilized. One method is direct impact; and the other excitation on the body mount. Using a series of component test data, the direct impact method yields the natural frequency, f, and damping factor, ζ, for a spring-mass-damper model of a body mount. The functional relationship between the g-force versus deflection curve and f, ζ, and v (impact speed) is examined. Given a frame impulse, the excitation method predicts the body response by the convolution integral. The transient transmissibility (TT), the ability of a body mount to transmit shock impulse from the frame to the body in the early part of crash duration, is investigated. The degree of front-loadedness on the body pulse is determined by TT and thus it affects the occupant/vehicle crash response.
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