摘要
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.
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 dimensions, machining process and material strength, so as to analyze both the reliability of fatigue strength and relevant economical level, thus determining all the design parameters of the piston rod, including dimensions, process technology and material to carry out parametric design. The results showed that the combination of reliability theory with parametric design is very promising in engineering practice.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第9期1310-1313,共4页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2006AA04Z408)
关键词
往复式压缩机
活塞杆
螺纹应力分布
疲劳强度
可靠度
参数化设计
reciprocating compressor
piston rod
thread stress distribution
fatigue strength
reliability degree
parametric design
