## LS-DYNA冲击型压电微动台的动力学建模与仿真

Title   Dynamic Modeling and Simulation for a Inchworm-type Piezoelectric Micro Platform
Abstract
This paper from the perspective of engineering applications, considering the impact of various complex factors in the process of driver, taking precise piezoelectric actuator of the microscopic engineering as the main object of study, based on a piezoelectric-thermal analogy method, comparing inverse piezoelectric effect of piezoelectric material with the constitutive equations of thermoelastic material, the equivalent thermal parameters obtained by the piezoelectric parameters. The inverse piezoelectric effect simulated by applying a temperature load and the corresponding thermal expansion. And then using explicit finite element analysis software LS-DYNA simulate the complex dynamical behavior of actuator drived by step voltage or high frequency voltage with the triangular cycle. Then using the program analyzes the impact force in numerous contact-impact between the target body and the impact hammer and the kinematic behavior of the target body. Finally compare the analysis result with the experimental results. The finite element analysis results show that the piezoelectric-driven process with high accuracy and production value, providing a theoretical basis for the simulation of complex piezoelectric actuator structure. 源自六@维|论*文^网*加7位QQ324`9114 www.lwfree.cn
Keywords  piezoelectric micro actor; precision positioning;  thermoelastic analogy method; Finite Element Analysis
目   次
1  引言    2
1．1  研究背景及选题意义    2
1．2  国内外研究概况    3
1．3  本文主要研究内容    3
2  压电方程及热弹性比拟    5
2．1  压电本构方程    5
2．2  简化压电方程    6
2．3  热弹性本构方程    7
2．4  压电-热弹性比拟    8
3  有限元模型    9
3．1  模型建立    9
3．2  施加约束、载荷及定义接触    15
4  计算结果及分析    18
4．1  阶跃电压下压电致动器的运动    18
4．2  接触碰撞动力学响应    20

1  引言
1．1  研究背景及选题意义

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