超大型塔式起重机起重臂的焊接变形仿真研究  

Simulation Research on Welding Deformation of Jib of Super-large Tower Crane

作　　者：秦德贵 肖浩 陈顺 员征文 尹莉 刘延斌 Qin Degui;Xiao Hao;Chen Shun

机构地区：[1]中交二航局第四工程有限公司 [2]中交第二航务工程局有限公司 [3]起重机械关键技术全国重点实验室 [4]中联重科建筑起重机械有限责任公司

出　　处：《工程机械》2024年第2期141-146,I0007,共7页Construction Machinery and Equipment

基　　金：湖南省重点研发计划项目(2023GK2075);湖南省科技成果转化及产业化计划产业创新链项目(2021GK1060)。

摘　　要：通过对超大型塔式起重机起重臂的焊接过程进行仿真计算,获得起重臂焊后变形趋势和变形量,并对计算结果进行试验校核。根据仿真计算得出的变形趋势,设置不同焊接顺序和工艺支撑优化方案,得到最佳焊接变形控制方案,并且采用试验验证优化方案的变形控制效果。研究结果表明,起重臂上下主弦呈现波浪形变形趋势,最大变形出现在上主弦端部,数值为7.3 mm,与试验测得的最大变形7.5 mm,较为接近。通过对比研究,得出工艺支撑优化方案控制焊接变形较为明显,控制效果在69%以上。Simulation calculation is carried out on the welding process of the jib of the super-large tower crane to obtain the postwelding deformation trend and deformation amount of the jib,and the calculation results are verified by tests.Based on the deformation trend derived from the simulation calculation,different welding sequences and process support optimization plans are set up to obtain the best welding deformation control plan,and the deformation control effect of the optimization plan is verified by tests.The research results show that the upper and lower main chords of the jib show a wavy deformation trend,and the maximum deformation appears at the end of the upper main chord,which is close to the maximum deformation measured in the test.Through comparative research,it is concluded that the process support optimization plan controls the welding deformation more obviously,with a control effect of over 69%.

关 键 词：超大型塔机 起重臂 焊接数值模拟 焊接变形 

分 类 号：TH213.3[机械工程—机械制造及自动化] TG404[金属学及工艺—焊接]