基于固有应变法的船舶大功率柴油机机座焊接变形预测  

Prediction of Welding Deformation of Marine High-power Diesel Engine Base Based on Inherent Strain Method

作　　者：周方明[1] 邬辉辉 刘彬[1] ZHOU Fangming;WU Huihui;LIU Bin(Key Laboratory of Advanced Welding Technology of Jiangsu Province,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学江苏省先进焊接技术重点实验室,江苏镇江212003

出　　处：《徐州工程学院学报（自然科学版）》2020年第3期25-28,共4页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家自然科学基金项目(51775254)。

摘　　要：大型柴油机机座构件尺寸大、焊缝分布广,传统的有限元焊接仿真方法难以满足其大尺寸结构计算的要求.基于热循环曲线有限元法对T型局部接头进行焊接变形计算,获取焊缝处平均固有应变值,然后将其作为初始载荷施加在全尺寸壳单元分段模型上进行弹性计算,最终得到柴油机座的整体焊接变形.仿真结果表明,结合小模型的热循环曲线法和大结构固有应变法,能够对柴油机机座的焊接变形进行准确高效的预测.Large diesel engine base components have large size and wide distribution of welds.Traditional finite element welding simulation methods are difficult to meet the requirements of large-scale structure calculation.Based on the thermal cycle curve finite element method,the welding deformation of the T-shaped local joint is calculated,the average inherent strain value at the weld is obtained,and then it is applied as an initial load on the full-scale shell element segment model for elastic calculation,and finally the overall welding deformation of diesel engine seat is obtained.The simulation results show that the thermal cycle curve method of small model and the inherent strain method of large structure can accurately and efficiently predict the welding deformation of the diesel engine base.

关 键 词：柴油机机座 焊接变形 固有应变 热循环曲线法 

分 类 号：TG404[金属学及工艺—焊接]