研究了求解区域有凹边界存在时边界结点数对求解精度的影响。
The influence of node Numbers in a non-convex boundary on the solution accuracy is investigated.
用常规的幂强化公式计算药筒在引伸后的强度时，数值偏低较多，原因是该公式未考虑引伸凹模锥角对强化的影响。
But the strength of the cartridge case after ironing drawing cannot be accurately calculated by this formula, because the result of calculation is lower than that reached in practice.
本论文对曲面凹模成形工艺的若干问题进行了系统的理论分析。
In this thesis, the basic aspects about forming process of camber die are studied etically .
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