Stochastic Computational Mechanics for Aerospace Structures

摘要: F RACTURE and fatigue have become important factors in the structural design safety considerations of aerospace structures. Due to uncertainty loads generated by wind gusts jet engines, material properties advanced materials (ceramics composites), shortcomings computational model, it is apparent that deterministic methods are not sufficient for Probabilistic approaches employing a theory stochastic processes statistics needed provide rational reliability analysis describe behavior structure. Stochastic mechanics methodology which forms basis risk structures, mechanical components, systems. The fundamentals probabilistic its application uncertain systems summarized Ref. 51. Based on nature uncertainties external parameters system (such as geometry), problems can be classified into two categories: 1) structure's deterministic, random with time-variant uncertainties; 2) loading, properties, geometry involve time-invariant uncertainties. term vibration often used designate first category problems. field vibrations reviewed well 5. problem combination both above categories has also been investigated.' It found