大型滚装船弯扭强度整船有限元分析

Bending-torsion strength analysis of large RO/RO ship on entire ship model

以大型滚装船为研究对象,采用现代的三维全船有限元分析技术及DNV船级社的SESAM软件系统,为全面研究整船弯扭强度,建立了全船有限元结构模型、质量模型、水动力计算模型;应用三维辐射—绕射理论和有限元程序进行波浪载荷的长期预报,在此基础上确定设计波参数;对全船结构有限元模型在设计波载荷作用下分析计算得到各种工况下船体结构的应力、变形响应,获得船体结构强度特点,对该类船舶的结构设计优化和强度分析有一定的参考价值,同时对其他类型船舶弯扭强度全船有限元分析有借鉴意义。

The paper deals with bending-torsion strength of large Ro/Ro ship. By the modern shipanalyzing technique of 3-D entire ship finite element model and DNV＇s SESAM system. First the structural FE model, mass-model, hydrodynamic-model are set up. Then by a 3-D radiation-diffraction theory and FE program the long term prediction of wave includes motion and loading is performed, based on which a group of design waves are defined. The bending-torsion combined deformation and stress in each part of main structural members of ship hull on design waves are calculated by an FE model of entire ship hull. The trait of bending-torsion strength is acquired. Which is guidance to this type vessel and other vessels on the shipanalysis of structural optimum and strength.