膜片联轴器动力学仿真及疲劳寿命分析

发布时间：2018-05-01 15:16

本文选题：膜片联轴器 + 动力学仿真　；参考：《重庆大学》2012年硕士论文

【摘要】：膜片联轴器是一种联接轴与轴或其他回转零件以实现传递运动和动力的装置，，主要由膜片、中间轴、法兰、连接环、压板、螺栓等零件组成。膜片联轴器可通过膜片的弹性变形来补偿相对位移，允许所联两轴存在一定的轴向、径向和角向安装误差，且对传动系统有缓冲和减振作用，是一种高性能的挠性联轴器，广泛应用于各种机械装置的轴系传动中。膜片联轴器结构复杂，膜片损坏导致的联轴器失效将直接影响传动系统的正常工作，甚至造成安全事故。因此，开展膜片联轴器接触有限元分析、动力学仿真和疲劳寿命分析的研究有重要的工程应用价值。本文综合应用多体接触有限元法、动力学仿真理论以及疲劳寿命分析方法，对膜片联轴器力学性能和疲劳寿命进行研究。本文的主要研究工作如下： ①考虑膜片联轴器实际工作状态下的螺栓预紧力、离心力、扭矩等载荷工况，建立了膜片联轴器的整体有限元模型，采用ANSYS软件对其进行多体接触有限元分析，研究了轴向、径向和角向安装误差对膜片联轴器力学性能的影响。 ②借助ANSYS软件采用分块Lanczos法分别对膜片联轴器整体和膜片组进行模态分析，计算获得联轴器和膜片组的前20阶固有频率及其对应的振型。 ③采用虚拟样机仿真软件ADAMS，建立了膜片联轴器多刚体动力学模型，在此基础上对膜片进行柔性化处理，建立膜片联轴器的刚柔耦合模型，通过刚柔耦合动力学仿真分析得到了膜片和螺栓的载荷时间历程。 ④运用ANSYS软件对膜片和螺栓进行静力分析，借助FE-SAFE软件把静力分析的结果文件与刚柔耦合动力学仿真分析得到的载荷时间历程相结合，通过疲劳计算得到膜片和螺栓的疲劳寿命。
[Abstract]:Diaphragm coupling is a device that connects shaft with shaft or other rotary parts to transfer motion and power. It mainly consists of diaphragm, intermediate shaft, flange, connecting ring, press plate, bolt and so on. The diaphragm coupling can compensate the relative displacement through the elastic deformation of the diaphragm, allowing certain axial, radial and angular installation errors in the two axes of the coupling, and it also has the function of buffering and reducing the vibration of the transmission system, so it is a kind of high performance flexible coupling. It is widely used in shafting transmission of various mechanical devices. The structure of diaphragm coupling is complex, and the failure of coupling caused by diaphragm damage will directly affect the normal operation of transmission system and even lead to safety accidents. Therefore, the research of contact finite element analysis, dynamic simulation and fatigue life analysis of diaphragm coupling has important engineering application value. In this paper, the mechanical properties and fatigue life of diaphragm coupling are studied by means of multi-body contact finite element method, dynamic simulation theory and fatigue life analysis method. The main work of this paper is as follows: In this paper, the integral finite element model of diaphragm coupling is established by considering the load conditions such as pretightening force, centrifugal force, torque and so on. The multibody contact finite element analysis is carried out by using ANSYS software, and the axial direction is studied. Effects of radial and angular mounting errors on mechanical properties of diaphragm coupling. (2) with the help of ANSYS software, the modal analysis of the whole diaphragm coupling and the diaphragm group is carried out by block Lanczos method, and the first 20 natural frequencies and the corresponding vibration modes of the coupling and the diaphragm group are calculated. 3 using virtual prototyping simulation software Adams, the multi-rigid body dynamics model of diaphragm coupling is established. On this basis, the flexible treatment of diaphragm is carried out, and the rigid-flexible coupling model of diaphragm coupling is established. The load time history of diaphragm and bolt is obtained by rigid-flexible coupling dynamic simulation. (4) the static analysis of diaphragm and bolt is carried out by using ANSYS software, and the result file of static analysis is combined with the load time history obtained by the simulation analysis of rigid-flexible coupling dynamics with the aid of FE-SAFE software. The fatigue life of diaphragm and bolt is obtained by fatigue calculation.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.4

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