往复式压缩机活塞杆可靠性分析与参数化设计

为提高往复式压缩机的设计水平,基于VC++编程语言和Pro/E软件,开发了活塞杆的疲劳可靠性分析与参数化设计系统.根据弹性力学的变形协调原理,分析活塞杆的受力情况,找出"薄弱环节",并采用有限元法加以验证;根据几何尺寸、加工工艺、材料强度等设计参数的随机性,建立"薄弱环节"的极限状态方程,分析疲劳强度可靠度及对应的经济性,从而确定各种设计要素(尺寸、工艺、材料等信息),以实现参数化设计.结果表明,可靠性理论与参数化技术在工程实际中的综合应用具有良好的前景.

Reliability Analysis and Parametric Design of Piston Rod of a Reciprocating Compressor

To improve the design level of reciprocating compressor,the VC++ and Pro/E were used to develop a system software for the fatigue reliability analysis and parametric design of piston rod.The loading state of piston rod was analyzed to find out the weak link in the design in accordance to the deformation compatibility principle of elastic mechanics and then the results were verified by FEM.A limit-state equation for the weak link was given according to the randomness of design parameters,such as geometric di...