EBOOK - Vehicle crash mechanics (Matthew Huang)

EBOOK - Cơ học va chạm xe (Matthew Huang) - 490 Trang.

A basic characteristic of a vehicle structural response in crash testing and model simulation is the “crash signature,” commonly referred to as the crash pulse [1] (numbers refer to references at the end of each chapter). This is the deceleration time history at a point in the vehicle during impact. The crash pulse at a point on the rocker panel at the B-pillar is presumed to identify the significant structural behavior and the gross motion of the vehicle in a frontal impact.

Other locations, such as the radiator and the engine, are frequently chosento record the crash pulse for component dynamic analysis. The nature of the crash response depends on the mass, structural stiffness, damping at that location, and on external interactions from neighboring components. In this chapter, techniques for analyzing the basic vehicle, occupant and restraint system interactions, digital filtering, and the crash pulse are reviewed; also, applications of the kinematic relationships in the analysis of restraint coupling and ridedown efficiency [2-5] are covered. Case studies involving air bag crash sensing, deployment, and crash recorder data analysis are also presented.



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