基于有限元的整船结构多学科设计优化  

FEM Based MDO Model for Entire Ship Structural Optimization

作　　者：潘彬彬[1] 崔维成[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《中国造船》2010年第1期47-54,共8页Shipbuilding of China

摘　　要：目前在同时考虑舰船水动力性能和结构性能的多学科设计优化模型中,水动力性能和结构性能的预报通常只能采用精度较低的经验公式。为了提高多学科设计优化模型的计算精度,必须要实现的技术就是将舰船水动力性能预报依赖于CFD的分析和将结构性能预报依赖于有限元的分析。重点研究了在多学科设计优化框架中集成有限元软件进行结构优化的技术。首先以一个简单的耐压圆柱壳为例子,介绍了iSIGHT调用Ansys进行包括参数化建模在内的结构优化的流程。然后对某船的整船有限元分析模型进行了整船结构优化研究。由于该船的整船结构有限元模型包含202个板和梁的属性,优化模型的设计变量很多,超出了目前很多优化算法的使用范围。在经过了多种优化算法的比较后,最终得到了优化解,实现了基于有限元的整船结构多学科设计优化。Current sea performance module and structure module in ship Multidisciplinary Desigla Optimization （MDO） model are based on empirical formulas. In order to improve the precision of the ship MDO model, the sea performance prediction module based on CFD and structural analysis module based on FEM should, be established. This paper focuses on the implementation of FEM based, structural optimization which is carried out bY integrating FEM analysis tools （Ansys） into MDO Framework （iSIGHT）. At first, a simple Cylinder under pressure is used to demonstrate the integration procedure of iSIGHT and Ansys. Then an entire ship FEM based structural optimization is implemented. The number of the design variables of the FEM based entire ship structural optimization is as many as 202, and has exceeded the upper limit of most optimization algorithms. After several trial calculations and comparisons of the optimization algorithms of iSIGHT, the optimum is obtained, and that is able to establish the FEM based structural analysis module of ship MDO model.

关 键 词：船舶 多学科设计优化(MDO) 有限元(FEM) 结构优化 

分 类 号：U661.4[交通运输工程—船舶及航道工程]