ANSYS柱体超声波电机的简并

菜单

摘要超声波电机是以压电陶瓷逆压电效应激发的超声振动为驱动力，通过定转子间摩擦力耦合来驱动转子运动的一类非电磁电机。柱体超声波电机是具有广阔市场前景的超声波电机之一。研究柱体超声波电机的简并问题，有利于提高电机运行过程中的稳定性，降低损耗。64374

本文首先回顾了超声波电机的发展历史和柱体超声波电机在国内外的研究现状，确定了本文的研究内容。然后介绍了压电陶瓷的特性和柱体超声波电动机的运行机理，着重讨论了柱体超声波电动机的工作原理，对定子表面质点的运动状况进行了推导。在建立定子有限元模型基础上，对定子结构进行了模态分析和谐响应分析，根据分析结果选择合理的切削深度实现两相频率的简并。

毕业论文关键词柱体超声波电机模态分析谐响应分析简并

毕业设计说明书（论文）外文摘要

Title Degeneration of Cylinder Ultrasonic Motor

Abstract The ultrasonic motor(USM) utilizes the converse piezoelectric effect and the friction coupling operation between stator and rotor to drive, as is quite different from traditional electro-magnetic motor. Cylinder ultrasonic motor is one of ultrasonic motors that have a broad market prospects. It is helpful that researching the problem of cylinder ultrasonic motor’s degeneration to improve the stability of the motor during operation and reduce losses.

Firstly, history of USM and research on cylindrical piezoelectric ultrasonic motor is briefly reviewed, as well as the content and purpose of this dissertation. Secondly, characteristics of piezoelectric ceramic are introduced, the operation mechanism of cylindrical piezoelectric ultrasonic motor is also discussed. And then, particle motion on the surface of the stator status was derived. On the basis of finite element model of stator, modal analysis and harmonic response analysis are implemented. According to the results, a reasonable cutting depth is chosen to achieve degeneration of a cylinder ultrasonic motor.

Keywords Cylinder ultrasonic motor Modal analysis Harmonic response analysis Degeneration

1 绪论 1

1.1柱体超声波电机的发展历程 1

1.2柱体超声波电机的特点及分类 1

1.3柱体超声波电机的应用领域 2

1.4柱体超声波电机的研究现状 3

1.5 选题的意义 4

2 柱体超声波电机的运行原理及相关理论 5

2.1压电陶瓷及其特性 5

2.2 压电效应与压电方程 7

2.3 压电陶瓷的振动模式 9

2.4 柱体超声波电机的运行原理 10

3 柱体超声波电机的简并 13

3.1 有限元分析软件ANSYS简介 13

3.2 模态分析 14

3.3 谐响应分析 20

结论 24

致谢 25

参考文献 26

1 绪论

柱体超声波电机是一种区别于传统电磁式电机的全新概念的电机产品。它利用压电材料的逆压电效应将电能转换成机械能, 激发出定子(弹性体)的超声振动, 同时在定子表面上形成椭圆运动, 并利用这种椭圆运动来完成动力及运动的传输。超声电机具有结构简单、紧凑、形式多样、低速输出、安静运转、具有较大的扭矩体积比、易于定位及调速控制等优点, 具有很好的应用前景。其中, 圆柱弯曲型超声电机是较典型的一类行波型超声电机。论文网