新IGC规范下的Type C型LNG/LPG运输船鞍座数值模拟研究  

New IGC Code saddle model simulations of Type C LNG/LPG carrier

作　　者：娄本强 LOU Ben-qiang(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院

出　　处：《海洋工程装备与技术》2018年第B10期238-243,共6页Ocean Engineering Equipment and Technology

摘　　要：本文根据《国际散装运输液化气体船舶构造与设备(IGC)规范》中加速度计算公式的更新,对液化气LNG/LPG运输船支持鞍座考虑非线性接触模拟。采用某C型液化天然气运输船的相关数据,使用MSC.Patran/Nastran建立有限元模型,考虑运输船在静满载和动垂荡的状态下耦合液货的运动,对全船加载。分别将"临时杆单元"法和线性间隙单元法应用于工程实践中,通过对有限元结果计算精度与效率的分析,验证线性间隙单元方法的合理性和可靠性。为结构优化和强度分析提供重要依据和分析工具。Based on the updated requirements of"International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk",the article discussed the saddle structure strength analysis between independent type-C liquid tank and hull construction using nonlinear contract technology.Investigations have been carried out from the references and FE model of a typical liquefied gas carrier,using MSC.Patran/Nastran software.Considering three loading conditions of static full loaded sagging,dynamic rolling and pitching,coupling with the ship motion and cargo tank.Accuracy and efficiency has been assessed between the results of temp rod and linear gap element methods;it has been observed the reliability and practicability of linear gap element application.Combined with the shipbuilding experiences and the numerical results,it was also found it is necessary considering the friction influences during the FE analysis.The paper has proposed an effective approach for carrier saddle strength analysis of type C LNG/LPG.

关 键 词：新IGC规范 C型独立液罐 "临时杆单元"法 线性间隙单元 Patran/Nastran软件 

分 类 号：U661.43[交通运输工程—船舶及航道工程]