轴向循环载荷下扁钢加筋板极限强度研究  

Ultimate Strength of Flat-Bar Stiffened Plate under Axial Cyclic Loading

作　　者：崔虎威 方文武 丁启印 CUI Huwei;FANG Wenwu;DING Qiyin(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing High-Tech Development and Construction Investment Group Co.,Ltd.,Chongqing 401329,China;Transportation Research and Design Institute,Chongqing Investment Promotion Bureau,Chongqing 400041,China;Hubei Key Laboratory of Inland Shipping Technology,Wuhan 430063,Hubei,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]重庆高新开发建设投资集团有限公司,重庆401329 [3]招商局重庆交通科研设计院,重庆400041 [4]内河航运技术湖北省重点实验室,湖北武汉430063

出　　处：《重庆交通大学学报（自然科学版）》2024年第4期97-103,109,共8页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金青年基金项目(52001040);重庆市自然科学基金项目(cstc2021jcyj-msxmX0944);重庆市教委青年科研项目(KJQN202000712);国家水运安全工程技术研究中心开放基金项目(A2021003);内河航运技术湖北省重点实验室开放基金项目(NHHY2021004)。

摘　　要：为分析带板厚度、加强筋尺寸及循环加载模式对扁钢加筋板极限强度的影响,采用有限元软件ABAQUS,基于初始变形、焊接残余应力和鲍辛格效应,针对不同带板厚度和加强筋尺寸的扁钢加筋板开展了3种轴向循环载荷模式下的极限强度数值模拟。研究结果表明:当扁钢加筋板的带板厚度相同时,经循环载荷后,加筋板的极限强度随加强筋尺寸的增加而下降,其下降程度减缓;当加强筋尺寸相同时,经循环载荷后,加筋板的极限强度随带板厚度的增加而下降,其下降程度加剧;当循环载荷的幅值由大到小时,扁钢加筋板的极限强度下降程度最大;在等幅循环载荷时,扁钢加筋板循环后的极限强度下降程度最小。In order to study the influence of attached plate thickness,stiffener size and cyclic loading mode on the ultimate strength of flat-bar stiffened plates,the finite element software ABAQUS was used to carry out the numerical simulation of ultimate strength of flat-bar stiffened plates with different attached plate thicknesses and stiffener sizes under three axial cyclic loading modes,which was based on the initial deformation,welding residual stress,and Bauschinger effect.The research results show that when the attached plate thickness of the flat-bar stiffened plates is the same,the ultimate strength of the stiffened plate decreases with the increase of the stiffener size after cyclic loading,and the degree of decrease slows down.When the stiffener size is the same,the ultimate strength of the stiffened plate decreases with the increase of the attached plate thickness after cyclic loading,and the degree of decrease intensifies.When the amplitude of cyclic loading decreases from large to small,the ultimate strength of the flat-bar stiffened plate decreases the most.When subjected to constant amplitude cyclic loading,the ultimate strength of the flat-bar stiffened plate decreases the least after cyclic loading.

关 键 词：船舶工程 循环载荷 扁钢加筋板 初始缺陷 极限强度 

分 类 号：U661.42[交通运输工程—船舶及航道工程]