【摘要】 通过设定金属在熔点以上温度时不同等效导热系数,补偿ANSYS焊接温度场模拟时高斯表面热源的缺陷,研究电弧吹力和熔池液态金属对流共同作用下,熔池高温热交换速度变化对焊缝和热影响区粗晶区热循环的影响。结果表明,熔池高温传热速度对焊缝和热影响区800℃到500℃冷却时间的影响很小,用ANSYS软件模拟电弧吹力较大的焊接温度场时,若只考虑焊缝和热影响区800℃到500℃冷却时间时,采用高斯热源加载方式是可行的。更多还原

【Abstract】 Giving metal different equivalent thermal conductivity coefficients over melting temperature, to offset the limitations of gauss heat source model that be used in numerical simulation of welding temperature field based on ANSYS, the integrative effect of blow force of welding arc and heat transfer in welding pool on welding thermal cycling of welding line and CGHAZ was studied. The results show that heat transfer rate of the welding pool at high temperature has little influence on the cooling time from 800℃ to 500℃ of the welding line and CGHAZ, and when the above data be emphasized, it is feasible to ignore the arc blow force and adopt gauss heat source model in numerical simulation of temperature field based on ANSYS.更多还原