基于可靠性的船体结构多目标优化设计

本文从多目标与可靠性的角度研究了船体结构纵向构件的优化设计。一方面应用逐步宽度容约束的交互规划法来进行多目标的优化计算；另一方面，在总纵强度的可靠性计算中提取了多种失效形式的串联计算模型，并通过局部可靠度及整体可靠度约束将可靠性与多目标优化相结合。最后给出了某２０００ｔ散货船基于可靠性的纵向构件多目标优化设计实例。

Multi-objective Optimum Design of Ship Structure Based on Reliability Theory

The optimum design of ship structure is studied in this paper in terms of its reliability and multiple objectives. An interactive programning method(STEP method)is adapted for solving the multiple criteria problem. A series model for system reliability is proposed in the calculation of ship's longitudinal strength.Local and global reliabilities link up the combined optimization of reliability and multi-objectives. An optimum design example of a 20,000 t bulk cartier has been carried out to show the effect of practical application.