V型压缩机曲轴-滚动轴承系统动力学分析与优化设计  

Dynamic simulation and optimum design for the crankshaft-rolling-bearings system of a V-type reciprocating compressor

作　　者：何芝仙[1] 李昂[2] 

机构地区：[1]安徽工程大学建筑工程学院,安徽芜湖241000 [2]安徽工程大学纺织服装学院,安徽芜湖241000

出　　处：《机械设计》2012年第11期31-36,共6页Journal of Machine Design

基　　金：安徽省自然科学基金资助项目(1208085ME77);安徽省教育厅自然科学基金资助项目(KJ2010A042;KJ2008A031)

摘　　要：以某V型压缩机的曲轴-滚动轴承系统为研究对象,利用ADAMS动力学仿真软件,研究了额定工况作用下曲轴-滚动轴承系统的动力学行为和动力学优化设计问题。首先应用Hertz公式和超静定问题的解法(力法)推导滚动轴承受力与变形关系的计算公式并得到数值解,再以整个曲轴-滚动轴承系统为研究对象,在ADAMS中建立弹性曲轴-滚动轴承系统动力学仿真模型并求解,得到了额定工况下主轴承反力、曲轴轴颈中心径向振动响应。以此为基础,建立曲轴-滚动轴承系统动力学优化设计数学模型,该模型以两个主轴承曲轴轴颈中心径向振动响应振幅的加权平均值为目标函数,以压缩机气缸中心线夹角为设计变量。最后利用参数化建模技术建立ADAMS优化模型并进行设计研究,得到了设计变量与目标函数之间的关系和最优解。所得到的结论对压缩机动态设计有指导意义。Two problems about a crankshaft-wiling bearings system in a V-type reciprocating compressor are studied by AD- AMS, a special software for dynamical simulation. One is the dy- namic performance of the system and the other is the dynamic opti- mization. First a statically indeterminate problem for rolling bearing is studied to obtain the formula between the applying load and the relevant displacement, force method and Hertz theory are used to solve the statically indeterminate problem. The numerical solution is acquired. Then the dynamical simulating model for the system is built in ADAMS and the crankshaft was treated as a flexible one. The dynamic response of the crankshaft journal center and dynamic reacting forces of two rolling bearings are obtained under rated oper- ating condition. The mathematical model for dynamic optimization is presented, its objective function is the weighted average of the am- plitude of the crankshaft journal center in the two bearings and the design variable is the angle of cylinder lines. The parametric simu- lating model is constructed in ADAMS to search the optimum solu- tion. The relation between the design variable and objective value is disclosed through design study, which is a function module in the design evaluation tools of ADAMS. Numerical results are availablefor the dynamic design of reciprocating compressor.

关 键 词：超静定问题 曲轴-滚动轴承系统 动力学仿真 多目标优化 隐函数 

分 类 号：TH457[机械工程—机械制造及自动化]