带频率约束的浸水圆柱壳结构优化设计

与干结构相比，流固耦合系统属于非经典问题，其动态设计要复杂得多。本文基于流固耦合分析，主要探讨了浸水圆柱壳在频率，重量等约束条件下的优化设计问题。针对圆柱壳的结构特点，对壳体，流场分别采用有限条，边界元法进行分析以减小计算量。充分利用系统的灵敏数度信息，采用多目标优化方法对浸水圆柱壳进行了优化设计。通过具体算例证明了本文方法的可行性。

Structural Optimum Design of Cylindrical Shells Submerged in Water With Frequency Constraints

The dynamics design of liquid structure system is a non classical problem.So it seems more complex than the one of dry structure.Bas ed on the liquid structure interaction theory,The FS and BE methods are used t o analyses the system,which lead to degrade the scale of computing.Then the se nsitivity derivatives of the non classical system were given and the multi obj ective optimum method was used to maximize the fundamental frequency and minimiz e the shell'sweight.The result has shown that the method of this paper is effe ctive.