摘要
运用大型通用有限元软件ANSYS提供的PDS模块,以泵轴的几何尺寸、载荷、应力、弹性模量以及强度极限等参数作为随机输入变量,根据应力-强度干涉理论,建立极限状态函数;通过APDL参数化设计语言,建立泵轴参数化三维实体模型,根据实际受载情况,对泵轴进行静应力分析,生成概率分析文件,选用蒙特卡罗有限元方法和拉丁抽样法对泵轴进行可靠度设计,得到比传统设计方法精度高、易于实现的泵轴失效概率及可靠度.以HS1K型碱泵的泵轴为例进行计算,获得了碱泵的应力概率分布特征,在置信度为95%时,该泵的可靠度为99.75%.实践表明,利用ANSYS/PDS模块对泵轴进行可靠性分析,能为生产厂家改进设计提供理论依据,具有一定的工程应用价值.
Using probability design system（PDS） provided by ANSYS software,taking pump geometric dimensions,load,stress,elastic modulus and strength limit etc as random variables,and according to stress-strength interference theory,the limit state function was created.The 3D solid model was established by APDL parametric design.Considering the real load to the shaft,static stress calculation was conducted,and probability analysis file was created.The method of Monte Carlo simulation technique and Latin hypercube sampling method was used to calculate the shaft reliability.The result shows that the method can obtain higher precision of failure probability of the shaft and more convenient than the traditional design.A reliability assessment for HS1K alkali pump shaft was demonstrated as an example,and the probability distribution of the shaft stress was obtained.The reliability of the pump shaft is 99.75% in the confidence level of 95%.It shows that the ANSYS/PDS can provide a theoretical help for Manufacturers to improve product,and has some engineering application values.
出处
《排灌机械工程学报》
EI
2010年第6期506-509,共4页
Journal of Drainage and Irrigation Machinery Engineering
基金
中石化国产化项目(W07012)
江苏大学高级专业人才科研启动基金资助项目(07JDG065)
