基于逐步收缩法的船舶典型结构焊接变形预测  

Welding Deformation Prediction of Typical Ship Structure Based on Gradual Shrinkage Method

作　　者：苗玉刚 王林[1] 王子然 赵羽扬 邵丹丹 卓振坚 MIAO Yugang;WANG Lin;WANG Ziran;ZHAO Yuyang;SHAO Dandan;ZHUO Zhenjian(National Key Laboratory of Science and Technology on Underwater Vehicle,Harbin Engineering University,Harbin 150001,China;CSSC Huangpu Wenchong Shipbuilding Company Limited,Guangzhou 511462,China)

机构地区：[1]哈尔滨工程大学水下机器人技术国家级重点试验室,哈尔滨150001 [2]中船黄埔文冲船舶有限公司,广州511462

出　　处：《中国造船》2024年第5期159-171,共13页Shipbuilding of China

基　　金：国家自然科学基金面上项目(51975138);工信部高技术船舶科研项目(NO.CJ05N20)。

摘　　要：针对固有应变法在计算焊接变形过程中存在的缺陷,提出了逐步收缩法理论。首先基于热弹塑性理论,以SYSWELD软件为计算平台对船舶结构MYN1型接头的焊接变形和残余塑性应变进行计算;随后分别采用逐步收缩法和固有应变法对同一船舶结构的焊接变形进行预测,为了减少有限元模型的单元数,在采用逐步收缩法和固有应变法计算的过程中,采用了壳-固耦合有限元模型;最后比较采用3种数值模拟方法计算的MYN1型接头结构腹板和翼板的焊接变形趋势和试验结果。分析表明,相比固有应变法,采用逐步收缩法计算的腹板和翼板焊接变形趋势和大小与热弹塑性有限元法和试验结果更加一致,且花费的时间比热弹塑性有限元法更少。The paper proposes a gradual shrinkage method for the defects of the inherent strain method in the process of calculating welding deformation.Firstly,the welding deformation and residual plastic strain of the ship structure MYN1 were calculated based on the thermal elastic-plastic theory with SYSWELD software as the calculation platform.Subsequently,the inherent strain method and the gradual shrinkage method were used to predict the welding deformation of the same typical ship structure,and in order to reduce the number of elements in the finite element model,the shell-solid coupled finite element model was used in the inherent strain method and the gradual shrinkage method.Finally,by comparing the welding deformation trends and experimental results of the web and flange plates of the MYN1 structure calculated by the three numerical simulation methods,the analysis shows that the welding deformation trends and magnitudes of the web and flange plates calculated by the gradual shrinkage method compared with the inherent strain method are more consistent with those of the thermal elastic-plastic finite element method and the experimental results,and the time spent on the calculation is less compared with that of the thermal elastic-plastic finite element method.

关 键 词：焊接变形 数值模拟 热弹塑性有限元法 逐步收缩法 固有应变法 壳-固耦合有限元模型 

分 类 号：TG404[金属学及工艺—焊接]