本文讨论了外面具有真空区域的反场收缩位形的撕裂模不稳定性。
Tearing mode instabilities have been discussed for a reversed field pinch configuration of Bessel function model surrounded by a vacuum region.
指出，只有当附加磁场与等离子体接近不稳定边界的模相耦合时，才可能引起平衡位形很大的变化。
It is pointed out that a large variation in the equilibrium configuration may take place only when the small magnetic perturbations couple with the plasma modes which are almost neutally stable.
研究表明不同可控拉深筋路径对盒形件侧壁和凹模圆角部位的应变路径影响不大，而对凸模圆角处的影响较为显著。
The results show that the different CD moving paths have little effect on the strain paths of box sidewall and die corner, which have significant effect on punch corner.
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