采用疲劳试验概念设计模数化伸缩缝。

Using the concept of fatigue test to design a modular expansion joint.

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选择设计数控凸轮磨的结构和运动方程，利用西门子840c数控系统，对机械靠模数控凸轮轴磨床进行数控化改造。

CNC reformation to mechanical profile following CAM grinding machine is carried on by selecting the mechanic al structure of designing CAM grinding and applying Siemens 840c CNC system.

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介绍了优化设计模型，采用体积和模数同时极小化的设计目标，提出了分层优化策略；

The model of optimum design is introduced. The design objective of minimizing volume and module simultaneously are adopted, and a graded optimum strategy is presented.

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