Modal Analysis of a Ball Screw Reliability Test Bench based on Rolling Joint Stiffness Characteristic

Zhou Jie; Gao Hongli; Wang Fengchen

doi:10.16578/j.issn.1004.2539.2018.04.019

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Modal Analysis of a Ball Screw Reliability Test Bench based on Rolling Joint Stiffness Characteristic

更新时间：2022-10-20

- Modal Analysis of a Ball Screw Reliability Test Bench based on Rolling Joint Stiffness Characteristic
- Vol. 42, Issue 4, Pages: 92-96(2018)
- 作者机构：
  
  1. 西南交通大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2018.04.019
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[1]周杰,高宏力,王奉晨.基于结合部刚度特性的丝杠可靠性试验台模态分析[J].机械传动,2018,42(04):92-96.

Zhou Jie, Gao Hongli, Wang Fengchen. Modal Analysis of a Ball Screw Reliability Test Bench based on Rolling Joint Stiffness Characteristic. [J]. 42(4):92-96(2018)
[1]周杰,高宏力,王奉晨.基于结合部刚度特性的丝杠可靠性试验台模态分析[J].机械传动,2018,42(04):92-96. DOI： 10.16578/j.issn.1004.2539.2018.04.019.

Zhou Jie, Gao Hongli, Wang Fengchen. Modal Analysis of a Ball Screw Reliability Test Bench based on Rolling Joint Stiffness Characteristic. [J]. 42(4):92-96(2018) DOI： 10.16578/j.issn.1004.2539.2018.04.019.

摘要

为获得自主设计的丝杠可靠性试验台的动态特性,对试验台进行有限元动力学建模。针对丝杠系统具有大量可动结合部、但传统有限元方法不能很好模拟结合部接触的特点,采用赫兹弹性体接触理论计算丝杠螺母、导轨和轴承三类结合部的接触刚度,由此建立修正后的有限元模型。利用力锤激励法对试验台进行了试验模态分析,对比试验与修正后模型结果,模态频率最大误差不超过4%,验证了模型的精度,为退化试验后下一步的丝杠故障诊断和寿命预测提供了动力学依据。

Abstract

In order to get the dynamic characteristics of a ball screw reliability teat bench,the finite element dynamics modeling of the test bench is carried out. Aiming at the specific on the feature that ball screw system has too much rolling joints and the Finite Element Method（ FEM） can’t simulate it well,the Hertz contact theory is used to calculate the stiffness of ball screw joint,rolling guide joint and the bearing joint. Then,the improved dynamics model is established. By using impact test method,the modal test of the test bench is carried out,then a contrast between the improved dynamics model and the data obtained from the experiment is carried out. The maximum modal frequency error is no more than 4% which verified the correctness of model.The dynamics basis for the further ball screw faulty diagnosis and life prediction is provide by this model.

关键词

丝杠进给系统动力学建模模态分析有限元方法

Keywords

Ball screw feed systemDynamics modelingModal analysisFEM

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