基于热弹塑性有限元法的船体板极限强度研究  

Ultimate strength research of butt-welded hull plates based onthermal-elastic-plastic finite element method

作　　者：崔虎威 朱兴华 樊开敬 张朋 CUI Huwei;ZHU Xinghua;FAN Kaijing;ZHANG Peng(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;Hubei Key Laboratory of Inland Shipping Technology,Wuhan 430063,China;School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing High-tech Development and Construction Investment Group Co.,Ltd.,Chongqing 401329,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]重庆交通大学河海学院,重庆400074 [4]重庆高新开发建设投资集团有限公司,重庆401329

出　　处：《舰船科学技术》2024年第11期23-29,共7页Ship Science and Technology

基　　金：国家自然科学基金青年项目(52001040);重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0944);重庆市教委科学研究青年项目(KJQN202000712);重庆市教委科学研究重点项目(KJZD-K202300710);内河航运技术湖北省重点实验室开放基金资助项目(NHHY2021004);重庆市研究生科研创新项目(2023S0077)。

摘　　要：利用Abaqus软件,分析了热弹塑性有限元法在对接焊船体矩形板极限强度评估中的应用。首先,基于热弹塑性有限元法,直接获取船体板焊接残余应力与变形。进而采用非线性有限元法,评估了2块不同板厚(9.5 mm、11 mm)对接焊船体矩形板在轴向压缩载荷下的极限强度。研究表明,壳单元与实体单元计算所得温度场、残余应力场、变形结果相近,但前者计算效率显著提高。不同矩形板厚度对矩形板纵向残余应力的分布影响较小,但对其垂向挠度峰值影响较大。不同厚度矩形板通过数值模拟得到的极限强度值与Faulkner简化公式计算值误差分别为4.2%和5.1%,因此数值模拟值与公式计算值较吻合。The application of the thermal-elastic-plastic finite element method in the evaluation of the ultimate strength of butt-welded rectangular hull plates is analyzed by using ABAQUS software.First,based on the thermal-elastic-plastic finite element method,the residual stress and deformation of the hull plate were obtained directly.Then,the ultimate strength of butt-welded rectangular plates with different thickness(9.5 mm,11 mm)under axial compressive load was evaluated by nonlinear finite element method.The temperature field,residual stress field,and deformation results obtained from the shell element and solid element calculations are similar,but the calculation efficiency of the former is significantly improved.The thickness of the selected rectangular plate has less effect on the distribution of longitudinal residual stresses in the rectangular plate,but has a greater effect on deflection peak.The error of the numerical simulation value of the ultimate strength of the rectangular plates with different thickness and that of the simplified Faulkner formula are 4.2%and 5.1%respectively,so the numerical simulation value is in good agreement with the formula.

关 键 词：矩形板 对接焊 极限强度 热弹塑性有限元法 

分 类 号：U663[交通运输工程—船舶及航道工程]