基于设计波法的舰船整船有限元强度分析  

Strength analysis of overall ship FEM model based on design wave approach

作　　者：肖桃云[1] 樊佳[1] 梅国辉[2] 侯国祥[1] 陈力[1] 张聪[1] 胡 犇[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074 [2]中国舰船研究设计中心,湖北武汉430064

出　　处：《舰船科学技术》2010年第6期14-19,55,共7页Ship Science and Technology

摘　　要：基于谱分析法对舰船剖面波浪载荷进行长期预报并确定设计波参数。利用有限元软件MSC.Patran建立了全船有限元模型,通过PCL语言实现设计波波浪压力对船体湿表面有限元网格的自动加载。对2个设计波下的整船有限元进行分析,结果表明:整船分析不仅能真实表现舰船整体总纵变形和应力水平,还能充分考虑局部载荷对结构响应的影响。另外,基于三维水动力理论分析船体运动和剖面载荷进而确定设计波参数的过程,克服了传统经验公式估算载荷所导致的结果的不确定性和强度校核的不合理性。Long-term prediction of the ship＇s cross-sectional wave-induced loads is performed based on spectral analysis,and then the parameters of designed wave are determined.By FEM software MSC.Patran,FEM model of the global ship is built.The designed wave pressure is automatically applied to the ship＇s wet surface elements by using PCL language.Finite element analysis in two designed waves is performed.The results not only present the global longitudinal deformation and stress but also demonstrate the effects induced by local loads well.The procedures for determining the designed wave based on 3-D hydrodynamic theory make the results more rational than using the loads estimated by simple empirical formulas.

关 键 词：谱分析 设计波法 整船有限元分析 PCL语言 

分 类 号：U661.42[交通运输工程—船舶及航道工程]