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Computer-aided analysis and simulation was once considered practical only in high technology or high cost industries. However, the advent of personal computers has given simulation a new dimension and made hydraulic system simulation a viable addition to the design process in many industries. The FESIM package, presented in this paper, is a PC CAD tool for hydraulic system design and analysis which allows engineers to simulate and analyze hydraulic circuits, substitute components, vary design and/or operational parameters, and observe the performance (flow, pressure, temperature, etc.) of a system at every point in the circuit. Both the underlining principle of FESIM and numerous applications are illustrated.

A comprehensive strategy to investigate the role of the body mounts on the passenger compartment response in a frontal crash event is presented. The activities of the study include quasi-static vehicle crush testing, development of a component-level dynamic body mount test methodology, lumped-mass computer modeling, as well as technical analysis. In addition, a means of investigating the effects the body mounts have on the passenger compartment response during a frontal barrier impact is addressed.