基于有限元分析的大型结构件焊接热过程仿真研究  

Simulation and research on thermal process of welding of large-scale structural components based on FEA

作　　者：管超[1] 杨珏[1] 张永明[2] 李光[2] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]太原重工股份有限公司技术中心矿山所,山西太原030024

出　　处：《矿山机械》2016年第2期86-93,共8页Mining & Processing Equipment

摘　　要：以电铲底架这类大型焊接组件为研究对象,在有限元软件中建立了针对焊接温度场和应力场的仿真模型,进行了焊接过程仿真计算,基于高斯热源的优化加载方式,得到了不同预热温度、散热条件、坡口尺寸、热输入及计算控制选项等条件下的一系列计算结果,对各种差异条件下的焊接结果进行了对比分析,明确了多种边界条件对最终焊接状态的影响规律,为大型构架焊接工艺的确定提供了理论依据。The large welded components such as a excavator chassis was taken as the research object, its simulation model was established in FEA software to analyze the welding temperature field and the stress field. In addition, the simulation calculation of welding process was carried out, and the calculation results at various pre-heating temperature, cooling condition, groove size, heat input and calculating control option were obtained based on optimized loading mode of Gaussian heat source. And then, the welding status at various conditions was contrasted and analyzed, and the influential laws of various boundary conditions on final welding status were identified, which offered theoretical reference for determining the welding process of large structural components.

关 键 词：热应力分析 焊接仿真 热过程优化 

分 类 号：TG457.11[金属学及工艺—焊接] TD422.21[矿业工程—矿山机电]