基于标准ACIS模型数据, 利用Inventor VBA语言和B样条曲线对脉冲气体激光器中Ernst面型曲线进行逼近, 并采用线性扩展法对Ernst面型电极实现了3维实体建模设计, 设计结果可以直接导入Ansys进行3维电场有限元计算分析。通过对比不同坐标点数的Ernst曲线的误差情况, 明确了导致电极边缘面型误差的原因, 对于B样条逼近Ernst曲线上曲率较大的部分进行了局部密集采样, 在提高模型文件中曲面面型精度的同时平衡了计算的速度, 并对设计结果进行了Ansys有限元计算和初步分析。

An automatic design method of gas laser electrode has been developed based on the standard ACIS model format file. In the method, Ernst profiles are approximated by utilizing Inventor VBA program language and B-spline curve, and the 3D Ernst electrode entity model is obtained with the linear extension method. The object file can be exported to Ansys for 3D finite element analysis. The errors of the Ernst curves approximated with points of different density were compared, and the reason for the errors was elucidated. Denser sampling was adopted in the part of higher curvature to balance the curve precision and computing speed. The designed object was analyzed in Ansys program.