基于弹性安定临界状态的船体梁极限强度Smith法研究  

Research on Smith's method of hull girder ultimate strength based on elastic shakedown limit state

作　　者：陈泽民 崔虎威 丁启印 胡润文 CHEN Zemin;CUI Huwei;DING Qiyin;Hu Runwen(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;Hubei Key Laboratory of Inland Shipping Technology,Wuhan 430063,China;Chongqing High-tech Development and Construction Investiment Group Co.,Ltd.,Chongqing 401329,China;China Railway 15th Bureau 3rd Engineering Co.,Ltd.,Chengdu 610079,China)

机构地区：[1]重庆交通大学航运与船舶工程学院,重庆400074 [2]内河航运技术湖北省重点实验室,湖北武汉430063 [3]重庆高新开发建设投资集团有限公司,重庆401329 [4]中铁十五局集团第三工程有限公司,四川成都610079

出　　处：《中国舰船研究》2025年第2期256-265,共10页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52001040);重庆市自然科学基金面上项目资助(cstc2021jcyj-msxmX0944);重庆市教委科学研究青年项目资助(KJQN202000712);内河航运技术湖北省重点实验室开放基金资助项目(NHHY2021004);重庆交通大学研究生科研创新项目资助(2023S0077)。

摘　　要：[目的]为准确评估船体梁的极限强度,考虑循环载荷下船体加筋板的弹性安定特性。[方法]基于非线性有限元数值模拟结果,对Rahman梁-柱法中加筋板单元的平均应力-平均应变关系进行修正,并充分考虑弹性安定状态、加筋板类型和失效模式,提出一种适用于弹性安定临界状态下加筋板平均应力-平均应变关系的修正方法,编制基于弹性安定临界状态的船体梁极限强度Smith法程序,并与非线性有限元数值模拟结果进行对比。[结果]结果显示,所提方法能够有效评估弹性安定临界状态下船体梁的极限强度,且相比非线性有限元方法更具计算优势。[结论]基于弹性安定临界状态的船体梁极限强度Smith法有助于船体梁极限强度准确且高效的评估。[Objective]To accurately assess the ultimate strength of a hull girder,this study analyzes the elastic shakedown characteristics of hull stiffeners under cyclic loading.[Methods]Based on the results of nonlinear finite element numerical simulation,the average stress-average strain relationship of the stiffened plate element in Rahman's Beam-Column Method is corrected with full consideration of the elastic shakedown state,type of stiffened plate,and failure mode.A correction method applicable to the average stress-average strain relationship of the stiffened plate in the elastic shakedown limit state is proposed,and a program for Smith’s method for the ultimate strength of hull girders based on the elastic shakedown limit state is compiled and compared with the results of nonlinear finite element numerical simulation.[Result]The results show that the proposed method can effectively evaluate the ultimate strength of a hull girder in the elastic shakedown limit state with greater efficiency than the nonlinear finite element method.[Conclusion]The application of Smith’s method for the ultimate strength of hull girders based on the elastic shakedown limit state can contribute to the accurate and efficient evaluation of the ultimate strength of hull girders.

关 键 词：船体梁 极限强度 Smith法 弹性安定 循环载荷 

分 类 号：U661.43[交通运输工程—船舶及航道工程]