| 摘要: |
| 在高斯热源的基础上,推导出模拟电孤摆动的带状热源模型,并基于该热源模型:以20?钢平板对接接头为研 究对象,运用ANSYS有限元分析软件，对其摆动焊接过程的温度场进行了数值模拟,获得了其焊缝区的瞬态温度场 以及各节点的焊接热循环曲钱。模拟结果表明:摆动焊接过程中，当热源接近时，焊缝附近节点的温度瞬时上升至 1000 以上,热源经过后,温度又降至200 t以下;与焊接方向垂直截面处节点的最高温度值随节点远离焊缝中心而逐渐降低;焊缝附近节点温度为200弋以下时，升温速度平缓，200 t以上则升温速度明姓增大;摆动焊接过程中， 焊件上形成宽而短的近似于圆形的熔池。 |
| 关键词: 摆动焊接 带状热源模型 高斯热源 数值模拟 温度场 |
| DOI： |
| 分类号: |
| 基金项目:中国石油大学研究生创新基金资助项目(S2007 - 6) |
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| Numerical simulation on temperature field of weaving welding based on strip heat source |
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LI Jin-mei, LEI Yi
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(College of Mechanical and Electronic Engineering in China University of Petroleum，Dongying 257061，China)
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| Abstract: |
| Based on Gaussian heat source, the model of strip heat source was derived to simulate the electric arc weaving. And based on this strip heat source model, the weaving welding temperature field of 20# steel plate butt joint was simulated using finite element analysis software of ANSYS. The transient temperature field and the nodes thermal cycle curves of the weld zone were obtained. The results show that during the weaving welding process, the temperature of the nodes near the welding seam can exceed 1000 X, while the heat source is close to these nodes, and the temperature of these nodes will be less than 200 °C while the heat source is away from them. Greater the distance between the nodes in the same section perpendicular to the welding direction and the welding seam center, lower the maximum temperature that the nodes can achieve. If the temperature of the node near the welding seam is less than 200 X,，the nodes temperature rising speed is smaller, and if the temperature exceeds 200 °C，the node's temperature rising speed is greater. There will be an approximate circular weld puddle which is wide and short on the weldraent. |
| Key words: weaving welding model of strip heat source Gaussian heat source numerical simulation temperature field |
