基于灵敏度分析的主轴热特性有限元模型修正

›› 2016, Vol. 29 ›› Issue (9): 79-.

基于灵敏度分析的主轴热特性有限元模型修正

叶绪康，李郝林

（上海理工大学机械工程学院，上海 200093）

出版日期:2016-09-15 发布日期:2016-09-26
作者简介:叶绪康（1991-），男，硕士研究生。研究方向：数控技术。李郝林（1961-），男，博士，教授，博士生导师。研究方向：精密测量与智能控制等。

Updating Finite Element Model of Spindle Thermal Properties Based on the Sensitivity Analysis

YE Xukang, LI Haolin

(School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

Online:2016-09-15 Published:2016-09-26

摘要/Abstract

摘要：

提出了一种基于灵敏度分析的模型修正方法。以某机床厂高精度磨床主轴系统为研究对象，通过有限元法仿真主轴系统温度场，结合试验测得几个关键测量点的实测温度，推导出修正边界条件的灵敏度矩阵，并反求出待修正参数的优化值，修正该主轴系统的热特性有限元模型。试验结果表明，基于灵敏度分析的模型修正方法经过4次迭代就能收敛到最优值，且经修正后的模型参数能使仿真的温度场最大误差从1199%减小到288%。

关键词: 灵敏度分析, 有限元模型修正, 热特性

Abstract:

A theory of finite element (FE) model updating based on the sensitivity analysis is proposed. A finite element model of spindle systems for a high precision grinder is established to analyze the thermal properties. However, the outcomes of the theoretical and experimental modal analyses do not match. Therefore, the analytical models of the structures need to be updated according to the experimental test results. This study addresses an updating algorithm to modify the numerical models by deducing the sensitivity analysis for unknown properties. The result shows that the FE model updating based on the sensitivity analysis can reduce the error between the experimental and analytical results from1199% to 288% by only four iterations.

Key words: sensitivity analysis, finite element model updating, thermal properties

中图分类号:

TG502

叶绪康，李郝林. 基于灵敏度分析的主轴热特性有限元模型修正[J]. , 2016, 29(9): 79-.

YE Xukang, LI Haolin. Updating Finite Element Model of Spindle Thermal Properties Based on the Sensitivity Analysis[J]. , 2016, 29(9): 79-.

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