Importance Measure Analysis for Use in Dynamic Performance Design of a Co-cured Composite Damping Instrument Panel

摘要

For the best dynamic performance of a co-cured composite damping instrument panel with light weight and high strength,a multilayer sandwich structure with polymethacrylimide (PMI) foam combined with embedded and co-cured composite damping structure is proposed.The structue can maintain the excellent mechanical properties of composite materials,and achieve the damping and light effect at the same time.Input variables which may affect the dynamic performance of the instrument panel were selected and variance based importance measure was analyzed through multifinite element method (FEM) analysis.Using the results of the importance measure analysis,with other design requirements,the important design variable was op timized and an instrument panel with the best dynamic performance under the requirements of light weight and high strength was obtained.The structure of the instrument panel can provide reference for the design of precision,high speed,and dynamic composite component.The importance measure analysis of dynamic performance of the instrument panel can provide a reference for relative design.