摘要
根据疲劳失效准则建立了高速冲床连杆疲劳可靠性分析的极限状态函数;考虑连杆的材料强度、疲劳系数及载荷等参数的随机性,利用ANSYS的概率设计功能,采用蒙特卡洛法对其进行疲劳可靠度计算、灵敏度求解,验证了连杆的疲劳可靠性,得出了影响连杆疲劳可靠性的主要因素,并据此对现有设计提出了改进建议。结果表明:采用ANSYS的概率设计功能对高速冲床连杆进行疲劳可靠性分析是可行的,为连杆的结构可靠性设计提供了新思路。
The limit state equation for fatigue reliability analysis of the connecting rod of high-speed punch was set up according to the fatigue failure criterion.The fatigue reliability and the sensitivity were calculated by Monte Carlo method based on ANSYS probabilistic design module,considering the randomness of the parameters such as materials strength,fatigue quotient and load.The fatigue reliability of the connecting rod was proved and the main influence factors were gotten.Improvement measures were given according to these.The results show the method is feasible and it provides a new method for the structure reliability design of connecting rod.
出处
《机床与液压》
北大核心
2012年第13期189-192,共4页
Machine Tool & Hydraulics
基金
国家科技重大专项项目(2011ZX04014-011)
江苏省产学研前瞻性研究资助项目(BY2010107)
关键词
连杆
疲劳可靠性
随机性
蒙特卡洛法
Connecting rod
Fatigue reliability
Randomness
Monte Carlo method
