基于ANSYS的D500钢激光焊接温度场数值模拟

Numerical Simulation on Welding Thermal Field of Laser Welding of D500 Steel Based on ANSYS

目的研究D500钢激光焊接温度场的变化。方法运用ANSYS有限元分析软件,以5 mm厚D500钢为研究对象,采用均匀分布的柱体热源与椭球热源组合的方法,建立了激光焊接热源模型。对D500钢激光焊接温度场进行了模拟计算,并与实验所得焊缝形状及尺寸进行了比较分析。结果结果表明,数值模拟所得焊缝截面尺寸与实验结果一致性达到95%以上。结论验证了柱体热源与椭球热源的组合热源模型在D500钢激光深熔焊接温度场模拟中的适用性,从而为不同焊接工艺条件下D500钢激光焊接焊缝形状和尺寸的预测,提供了一种有效的途径。

The aim of this work was to study the changes in laser welding thermal field of D500 steel. ANSYS finite element software was used for simulating the welding thermal field of laser welding of D500 steel with a thickness of 5 mm,and evenly distributed Ellipsoid-Cylinder hybrid heat sources were used to build the laser welding heat source model to perform simulation calculation for the laser welding thermal field of D500 steel. The results were comparatively analyzed with the weld seam shape and dimensions obtained by the experiments. The results showed that the consistency between the weld seam sectional dimensions obtained by simulation and the experimental results reached up to 95%. This study verified the applicability of the Ellipsoid-Cylinder hybrid heat source model in the simulation of laser welding thermal field of D500 steel,and provided an effective way for predicting the weld seam shape and dimensions of D500 steel under different welding conditions.