首先，概述有限元接触理论及求解非线性方程的方法。
Firstly, the contact theory and the method of solving nonlinear equations are summarized.
介绍了产生结构非线性的主要来源，并在接触理论的基础上对主反射镜组件进行了合理的有限元建模。
The main source for structural nonlinearity is summarized, and a FE model for the primary mirror subassembly of a collimator is established on the basis of contact theory.
轮轨相互作用遵从赫兹非线性弹性接触理论。
The interaction between wheel and rail conforms to the Hertzian nonlinear elastic contact theory.
轮轨相互作用遵从赫兹非线性弹性接触理论。
The interaction between wheel and rail conforms to the Hertzian nonlinear elastic contact theory.
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