基于固有应变法的钢箱梁结构双侧同步焊变形预测研究
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摘要
基于固有应变法,并采用T型接头双侧同步焊有限元模型,对钢箱梁结构的焊接变形作出预测分析。结果表明:固有应变法可以达到传统热弹塑性有限元法计算的精度;采用壳单元网格划分接近实体单元的计算结果。运用固有应变法及壳单元模型,对钢箱梁结构的双侧同步焊接变形作了预测分析,得到顶板焊接变形较大,底板变形主要集中在板边缘中部区域。在研究结果的基础上,给出了夹具、肋板数量、焊缝位置等具体措施用于钢箱梁结构双侧同步焊的建议。
Based on the inherent strain method and the synchronous welding finite element model of T-typed joint double sides,the welding deformation of the steel box girder was predicted and analyzed. Results show that: the inherent strain method can reach the calculation precision of the traditional thermal elastic-plastic finite element method. The calculation results of the solid element can almost be achieved by using the shell element meshing.Using inherent strain method and the shell element model,deformation prediction and analysis on synchronous welding of steel box girder double sides is made: the roof welding deformation is larger,and the deformation of the base plate is mainly concentrated in the middle part of the plate edge.Finally,on the basis of the research results,some suggestions on specific measures for synchronous welding of steel box girder double sides are given,and the specific measures include fixture,the number of floors and the position of weld seams.
Based on the inherent strain method and the synchronous welding finite element model of T-typed joint double sides,the welding deformation of the steel box girder was predicted and analyzed. Results show that: the inherent strain method can reach the calculation precision of the traditional thermal elastic-plastic finite element method. The calculation results of the solid element can almost be achieved by using the shell element meshing.Using inherent strain method and the shell element model,deformation prediction and analysis on synchronous welding of steel box girder double sides is made: the roof welding deformation is larger,and the deformation of the base plate is mainly concentrated in the middle part of the plate edge.Finally,on the basis of the research results,some suggestions on specific measures for synchronous welding of steel box girder double sides are given,and the specific measures include fixture,the number of floors and the position of weld seams.
引文
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[10]张继祥,刘紫阳,王智祥,等.桥梁钢结构T型接头双侧同步焊接有限元建模[J].电焊机,2014,44(8):77-83.ZHANG Jixiang,LIU Ziyang,WANG Zhixiang,et al.Research on finite element modeling for T-joint of double side synchronous welding for bridge steel structure[J].Electric Welding Machine,2014,44(8):77-83.
[2]UEDA Y,MURAKAWA H,GU S,et al.Simulation of welding deformation for accurate ship assembling in-plane deformation of butt welded plate[J].Journal of the Society of Naval Architects of Japan,1992,171:395-404.
[3]汪建华,陆皓,魏良武.固有应变有限元法预测焊接变形理论及其应用[J].焊接学报,2002,23(6):36-40.WANG Jianhua,LU Hao,WEI Liangwu.Prediction of welding distortions based on theory of inherent strain by FEM and its application[J].Transactions of the China Welding Institution,2002,23(6):36-40.
[4]方臣富,吴文烈,刘川,等.基于固有应变法预测双丝CO2气体保护焊液压支架顶梁变形[J].焊接学报,2013,34(11):1-4.FANG Chenfu,WU Wenlie,LIU Chuan,et al.Welding deformation of top beam structure in hydraulic support by CO2double-wire gas shield welding based on inherent strain method[J].Transactions of the China Welding Institution,2013,34(11):1-4.
[5]周方明,吴頔,朱正祥,等.基于正交试验设计的固有应变法在焊接变形预测的应用[J].江苏科技大学学报(自然科学版),2013,27(3):241-245.ZHOU Fangming,WU Di,ZHU Zhengxiang,et al.Application of inherent strain method based on orthogonal experiment design in welding deformation predictions[J].Journal of Jiangsu University of Science and Technology(Natural Science Edition),2013,27(3):241-245.
[6]周晶,常保华,张骅,等.采用固有应变法预测铝合金焊接变形[J].焊接技术,2010,39(6):6-10.ZHOU Jing,CHANG Baohua,ZHANG Hua,et al.Study on the prediction of welding distortion of aluminum alloy based on inherent strain method[J].Welding Technology,2010,39(6):6-10.
[7]任帅,李纯金,李磊,等.基于固有应变理论的船体焊接变形仿真研究[J].船舶工程,2015(10):84-88.REN Shuai,LI Chunjin,LI Lei,et al.Study on deformation simulation of hull welding based on inherent strain method[J].Ship Engineering,2015(10):84-88.
[8]罗宇,邓德安,江晓玲,等.热变形的固有应变预测法及实例[J].焊接学报,2006,27(5):17-20.LUO Yu,DENG Dean,JIANG Xiaoling,et al.A method to predict residual distortion based on inherent strain and its application to heating process[J].Transactions of the China Welding Institution,2006,27(5):17-20.
[9]梁伟,村川英一.T形焊接接头固有变形逆解析方法的开发[J].焊接学报,2013,34(10):82-85,120.LIANG Wei,Murakawa Hidekazu.An inverse analysis method to estimate inherent deformation in T-fillet welded joints[J].Transactions of the China Welding Institution,2013,34(10):82-85,120.
[10]张继祥,刘紫阳,王智祥,等.桥梁钢结构T型接头双侧同步焊接有限元建模[J].电焊机,2014,44(8):77-83.ZHANG Jixiang,LIU Ziyang,WANG Zhixiang,et al.Research on finite element modeling for T-joint of double side synchronous welding for bridge steel structure[J].Electric Welding Machine,2014,44(8):77-83.