ASTROS FOR RELIABILITY-BASED MULTIDISCIPLINARY STRUCTURAL-ANALYSIS AND OPTIMIZATION

In conducting multidisciplinary structural optimization, there is unce rtainty and randomness in the input information of finite element mode ls, material properties and boundary conditions; Because of the string ent performance requirements on the missions of modern aircraft, there is a need for reducing the structural failure probability due to unce rtainties by conducting stochastic analysis instead of a deterministic approach. This paper presents a strategy for conducting such an analy sis in a widely used structural analysis and optimization program ASTR OS. The execution control sequence of ASTROS is modified and reliabili ty analysis modules are incorporated for analysis and multidisciplinar y optimization. The implementation and modification of ASTROS for inco rporating the random nature of input information is demonstrated throu gh truss and wing structure examples. Copyright (C) 1996 Elsevier Scie nce Ltd.