摘要
针对微振动模拟器中精密导向机构行程小、精度高的要求,提出了一种具有精密导向作用的柔性膜片。首先,基于柔度矩阵法对柔性膜片的轴向与径向柔度进行建模;其次,基于柔性膜片的结构参数对其轴向和径向柔度进行参数化分析;接着,以高轴向柔度、高轴向/径向柔度比和低应力为目标,建立了优化设计模型,并对其进行优化,优化结果表明轴向柔度优化率为233%,轴向/径向柔度比优化率为172%,最大应力优化率为32%。优化后柔性膜片的各目标性能都得到较大提升;最后,通过有限元分析与实验进行验证。有限元分析与实验结果相对于理论分析的相对误差分别为6.7%和7.8%。理论分析与优化方法为柔性膜片提供了一个简单有效的设计思路。
A flexible diaphragm with precision guidance is proposed for the requirements of small stroke and high accuracy of the precision guidance mechanism in micro-vibration simulators.First,the axial and radial flexibility of the flexible diaphragm is modeled based on the flexibility matrix method;Second,the axial and radial flexibility of the flexible diaphragm is parametrically analyzed based on the structural pa-rameters of the flexible diaphragm;Then,an optimized design model was established with the objectives of high axial flexibility,high axial/radial flexibility ratio and low stress.The optimization results show that the optimization rate of axial flexibility is 233%,the optimization rate of axial/radial flexibility ratio is 172%,and the optimization rate of maximum stress is 32%.The performance of the flexible diaphragm is greatly improved in each target after optimization;Finally,finite element analysis and experiment are used for veri-fication.The relative errors of the finite element analysis and experimental results relative to the theoretical analysis are 6.7%and 7.8%,respectively.The theoretical analysis and optimization method provide a sim-ple and effective design idea for the flexible diaphragm in this paper.
作者
周洪海
秦超
徐振邦
王学问
巩浩
陈洋
ZHOU Hongha;QIN Chao;XU Zhenbang;WANG Xuewen;GONG Hao;CHEN Yang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;不详)
出处
《组合机床与自动化加工技术》
北大核心
2024年第4期1-5,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金重点项目(62235018)。
关键词
精密导向
柔性膜片
柔度矩阵
有限元分析
precision guidance
flexible diaphragms
flexibility matrix
finite element analysis
