描述了非线性自适应有限元的多重网格法求解过程。
A procedure of multi grid solution to adaptive nonlinear FEM is described in this paper.
开发了模拟多步开挖过程的非线性自适应多重网格有限元方法。
Nonlinear adaptive multigrid FEM for simulating multi-step excavation process was studied.
覆盖件的冲压成形是十分复杂的力学过程，由于涉及到多重非线性问题，其成形过程中各种问题的分析显得十分棘手。
It is a very complicated mechanics process of the automobile panels' stamping. For involving the multiple non-linear processes, various questions of stamping are very stubborn.
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