DYNAMIC RESPONESE OPTIMIZATION DESIGN FOR ENGINEERING STRUCTURES BASED ON RELIABILITY

摘要

In many practical structures,physical parameters of material and applied loads have random property.To optimize this kind of structures,an optinum mathematical model was built.This model has reliability constraints on dynamic stress and displacement and upper & lower limits of the design variables.The numerlcal characteristic of dynamic response and sensitivity of dynamic response based on probability of structure were deduced respectively.By equivalent disposing,the reliability constraints were changed into conventional forms.The SUMT method was used in the optimization process,Two examples illustrate the correctness and practicability of the optimum model and solving approach.