论基于概率模型的结构可靠性优化设计

Probabilistic Reliability-Based on Optimization of Structures

结构优化设计的目标是实现可能的最优设计。而结构设计受控于材料特性、几何参数、作用载荷及失效条件等诸多因素。这些因素通常存在不可避免的不确定性。为了实现安全性和经济性之间的协调和平衡 ,能合理处理各种不确定性的结构可靠性方法和先进的优化设计技术的结合成为人们的一种自然的选择。基于可靠性的结构优化设计 ,可在结构安全性和经济性之间达到最佳平衡。因而成为设计者所追求的最高目标。文中简要介绍和论述基于概率可靠性的结构优化设计技术的主要内容。

Structural design is subject to some unavoidable uncertainties in material and geometrical properties, loads, etc. To achieve the goal of harmony and balance between the structural safety and economy, the combination of structural reliability theory, in which uncertainties can be handled reasonably, and the advanced techniques for the optimization of structures becomes a natural choice of engineers. The optimization of structures based on reliability can make an optimum balance between safety and economy, and thus became the high goal of structural designers. In this paper, the techniques of probabilistic reliability based on structural optimization are briefly reviewed in contents, methods and its relative theories. Some existing problems are discussed.