摘要：基于SYSWELD软件平台，采用双椭球体移动热源模式，利用有限元方法建立了运动电弧作用下GTAW焊接不锈钢薄板焊接热场的三维动态有限元分析模型。利用所建模型，对GTAW焊接热场和熔池形状参数的动态演变进行了预测。达到宏观准稳态的时间与试验结果基本一致。
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