基于Ansys/AQWA的极大型浮式结构总体强度分析  

The global strength analysis of VLFS based on Ansys / AQWA

作　　者：曹剑锋[1] 李良碧[1] 顾海英[1] 杨鹏[2] 罗广恩[1] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《舰船科学技术》2015年第9期30-34,39,共6页Ship Science and Technology

基　　金：国家重点基础研究发展计划资助项目(2013CB36100);国家自然科学基金资助项目(5110910051479084);江苏省自然科学基金资助项目(BK2011508)

摘　　要：以极大型浮式结构的单模块为研究对象,采用大型通用有限元软件Ansys/AQWA进行极大型浮体水动力响应分析并预报波浪载荷,进而调用ASAS模块进行极大型浮体总体强度分析。分析结果表明:极大型浮体3个连接部位,即横撑与下浮体围壁连接处,立柱外壳与上箱体底板连接处和立柱外壳与下浮体外板连接处出现了较大的应力集中,其中横撑与下浮体围壁连接处的应力值可能已超过许用应力。因此,对横撑与下浮体围壁连接处进行结构加强,采用Ansys/AQWA对结构改进后的极大型浮体进行总体强度分析,并与改进前的结果进行对比。从对比结果可知:通过结构的改进和加强,横撑与下浮体连接处的Von Mises应力普遍下降。本文的研究成果将为极大型浮体后续的疲劳分析提供重要的理论基础。In this paper,Very Large Floating Structure（ VLFS） is taken as study object. First of all,hydrodynamic response and wave loads of VLFS are calculated with Ansys / AQWA,and then the global strength is analyzed with Ansys / ASAS. The analysis results show that the three connection parts of VLFS（ connection parts between cross brace and floating body,connection parts between columns and upper box,connection parts between columns and floating body） exist higher stress concentration. Among these positions,the stress of connection parts between cross brace and floating body may exceed the allowable stress. Hence,the structure of this part should be strengthened. Moreover,the global strength of VLFS after improvement is analyzed with Ansys / AQWA,and the result is compared to that before improvement. The comparison result indicates that the Von Mises stresses of the improved structure are generally decreased.Through the researches in this paper,some theoretical foundation would be laid for the fatigue strength analysis in the future.

关 键 词：极大型浮体 总体强度 Ansys/AQWA 

分 类 号：U661.4[交通运输工程—船舶及航道工程]