基于谱分析的薄膜型LNG船整船疲劳强度评估  

Fatigue Strength Assessment of the Whole Membrane LNG Carrier Based on Spectrum Analysis

作　　者：程成[1] 赵吉 韦喜忠[1] 陈鲁愚[1] 郑刚[3] CHENG Cheng;ZHAO Ji;WEI Xi-zhong;CHEN Lu-yu;ZHENG Gang(China Ship Scientific Research Center, Wuxi Jiangsu 214082, China;Wuxi Research Centre for Environment Science and Engineering, Wuxi Jiangsu 214000, China;Rules and Technology Center, China Classification Society, Shanghai 200135, China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]无锡环境科学与工程研究中心,江苏无锡214000 [3]中国船级社规范与技术中心,上海200135

出　　处：《船海工程》2021年第6期1-5,9,共6页Ship & Ocean Engineering

基　　金：江苏省高校青蓝工程(2019)。

摘　　要：按照中国船级社《基于谱分析的船体结构疲劳强度评估指南》的要求,针对薄膜型LNG船疲劳谱分析存在舱内载荷计算困难、计算工况数量多、谱分析过程复杂等问题,开发软件系统,实现舱内载荷计算和自动施加、多工况分批提交、应力计算、网格细化,以及疲劳谱分析的自动化,实船算例验证表明,该系统具有可靠性和准确性,可以在工程设计中使用。In light of the requirements of china classification society“Guidelines for Fatigue Strength Evaluation of Ship Structures Based on Spectral Analysis”,a software was developed to solve the problems in fatigue spectrum analysis of membrane LNG carrier,such as difficult calculation in the liquid tank,large number of load cases,and complex process of the spectrum analysis,etc.This software can realize automatic calculation and application of tank loads,multi-condition batch submission,stress calculation,mesh refinement and automatic fatigue spectrum analysis.The validity and accuracy of the calculation results of the system were verified by the example test,showing that the software can be used in engineering design.

关 键 词：薄膜型液化天然气船 谱分析 波浪谱 应力传递函数 应力谱 

分 类 号：U661.43[交通运输工程—船舶及航道工程]