基于子模型的混凝土泵车转台主焊缝强度分析  

Strength analysis of the turret key weld for concrete pump truck based on sub-model

作　　者：朱奇[1] 张鑫[1] 周志红 Zhu Qi;Zhang Xin;Zhou Zhihong(Hunan Industry Polytechnic,Changsha 410208,China)

机构地区：[1]湖南工业职业技术学院,长沙410208

出　　处：《焊接》2023年第4期49-54,共6页Welding & Joining

基　　金：湖南省教育厅科学研究项目(21C1075)。

摘　　要：针对长臂架混凝土泵车转台主焊缝计算结果不准确、计算效率不高的问题,提出基于子模型技术对焊缝进行精细化计算的方法。对转台进行整体计算分析,评估转台主焊缝区域应力;建立转台主焊缝区域的子模型,并在子模型中按照实际参数建立焊缝模型;计算子模型主焊缝在不同网格单元大小下的应力,分析应力收敛性,并验证子模型切割边界的可靠性;优化主焊缝参数,对比优化前后的计算结果,验证优化方案的可行性,并将优化后的参数应用于转台主焊缝的实际生产。结果表明,将子模型技术应用于转台主焊缝的校核与评估,能够显著提高焊缝的计算效率和计算精度,为焊缝参数的优化设计提供科学依据。研究结果为焊缝的设计计算提供了一种可行且有效的方法,也为其它大型构件局部结构的计算提供了重要参考。A fine calculation method was proposed on key weld according to sub-model technology.This method aims to solve the problems of inaccuracy and low efficiency in the calculation of key weld of long boom concrete pump truck turret.Firstly,the overall calculation and analysis of the turret were carried out to evaluate the regional stress of turret key weld.Secondly,the sub-model of the key weld area of the turret was established,and the weld model was established according to the actual parameters in the sub-model.Then,the stress distribution of the sub-model under different grid element sizes was calculated,the stress convergence was analyzed,and the reliability of the sub-model cutting boundary was verified.Finally,the key weld parameters were optimized,the calculation results before and after optimization were compared to verify the feasibility of the optimization scheme,and the optimized parameters were applied to the actual production of the key weld of the turret.The results show that the application of sub-model technology to check and evaluate the key weld of the turret can significantly improve the calculation efficiency and accuracy of the weld,and provide scientific basis for the optimization design of the weld parameters.The research results provide a feasible and effective method for weld design of turret,and also provide an important reference for local structure calculation of other large structural parts.

关 键 词：长臂架混凝土泵车 转台 主焊缝 子模型 强度分析 

分 类 号：TG442[金属学及工艺—焊接]