建立了该条件下的焊接热源模型，热源模型由作用在工件表面的高斯面热源和沿激光入射方向的旋转高斯体热源构成。
A heat source model, which comprises a gauss plane heat source on the top surface and a revolved gauss body heat source, was presented in this condition.
由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
由于光的衍射作用，使通过聚焦系统的激光束入射到特定靶面成一光斑（主光斑） ，而在主光斑以外还有次级光斑圈（旁瓣）。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
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