中文摘要：

高斯热源模型适用于焊接电弧冲击力较小的温度场数值模拟,如何有效确定高斯热源半径参数对于保证焊接模拟计算精度至关重要。在分析焊接瞬态温度场控制方程及边界条件的基础上,建立了2024铝合金焊接温度场有限元数值分析模型,选用高斯移动热源进行加载,计算与分析了高斯热源电弧有效加热半径对焊接温度场计算结果的影响,与红外线热成像仪实验得到的温度场结果进行对比并修正热源模型参数,确定了2024铝合金在给定焊接参数下的高斯热源有效加热半径值,为进一步准确、有效地研究焊接温度场、应力场分布规律提供参考数据。

英文摘要：

Gaussian heat source model is suitable for the welding temperature field numerical simulation of smaller welding arc force. How to effectively determine the radius of the Gaussian heat source is very important to ensure the accuracy of welding numerical simulation. Based on the analysis of welding control equation and boundary conditions of transient temperature field, the research establishes finite element numerical analysis model of 2024 aluminum alloy welding temperature field. Gaussian moving heat source was choosed to apply load. The impact of efficient heating radius of Gaussian heat source model on the calculation results of welding temperature field was calculated, the calculated temperature field results was compared with infrared thermal imager experiment results, and the heat source model parameters were amended.The effective heating radius of Gaussian heat source of 2024 aluminum alloy was determined based on the given welding parameters, which can provide reference data for the accurate and effective study of welding temperature field and stress field distribution.