Based on the three-dimension solid element, how to design for Object-Oriented nonlinear FEM Program.

作者结合三维实体单元模型，介绍如何对其进行面向对象的非线性有限元程序设计。

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Based on the analysis of the kinematic diagram of mechanism concerning the eccentric piston pump, the three-dimension model of the eccentric piston pump was established by CAXA solid design software.

在分析偏心柱塞泵机构运动简图和工作原理的基础上，运用CAXA实体设计软件创建了该机构的三维模型。

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