RESEARCH ON CHARACTERISTICS OF DAMPING PARAMETERS OF SANDWICH STRUCTURE OF MACHINE TOOL COMPONENTS BASED ON MODAL ANALYSIS

HU Jun; ZHU WenFeng; XU KaiLe; MA ZhuangZhuang

doi:10.16579/j.issn.1001.9669.2020.03.011

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RESEARCH ON CHARACTERISTICS OF DAMPING PARAMETERS OF SANDWICH STRUCTURE OF MACHINE TOOL COMPONENTS BASED ON MODAL ANALYSIS

更新时间：2022-09-22

- RESEARCH ON CHARACTERISTICS OF DAMPING PARAMETERS OF SANDWICH STRUCTURE OF MACHINE TOOL COMPONENTS BASED ON MODAL ANALYSIS
- Journal of Mechanical Strength Vol. 42, Issue 3, Pages: 580-584(2020)
- 作者机构：
  
  1. 天津科技大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.03.011
  CLC：
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HU Jun, ZHU WenFeng, XU KaiLe, et al. RESEARCH ON CHARACTERISTICS OF DAMPING PARAMETERS OF SANDWICH STRUCTURE OF MACHINE TOOL COMPONENTS BASED ON MODAL ANALYSIS. [J]. 42(3):580-584(2020)
DOI：

HU Jun, ZHU WenFeng, XU KaiLe, et al. RESEARCH ON CHARACTERISTICS OF DAMPING PARAMETERS OF SANDWICH STRUCTURE OF MACHINE TOOL COMPONENTS BASED ON MODAL ANALYSIS. [J]. 42(3):580-584(2020) DOI： 10.16579/j.issn.1001.9669.2020.03.011.

摘要

动态特性是影响机床精度的重要因素,目前,材料组合是被经常采用的一种有效方法。为了研究机床部件的动态特性,制作了螺栓连接夹层结构件。基于实验模态分析理论,采用TST 5912动态信号测试分析系统分别对以HT200和QT500材料为基层和约束层,丁腈橡胶(NBR)板和聚丙烯塑料(PP)板为夹层材料的结构件进行锤击实验。通过改变基层材料、约束层材料、夹层材料及厚度,获得夹层结构件的振型、固有频率、阻尼比等参数。实验表明,橡胶夹层结构的阻尼比大于塑料夹层结构的阻尼比,且随着夹层厚度的增加而增大;基层越薄,夹层结构件阻尼比的增加速率越大。

Abstract

The dynamic characteristics are important factors that affect the accuracy of machine tools. Currently,the material combinations are an effective method that is often used. In order to research the dynamic characteristics of machine tool components,the sandwich structure of bolted joint was fabricated. Based on the theory of experimental modal analysis,the TST5912 dynamic signal testand analysis system was used to conduct hammering experiment on the structural parts with HT200 and QT500 materials as the base and constrained layer,the nitrile rubber（ NBR） and polypropylene（ PP） plate as the sandwich materials. By changing the base material,the constraining layer material,the sandwich material and the thickness,the parameters such as vibration mode,natural frequency and damping ratio of the sandwich structure are obtained. The experimental results show that the damping ratio of the rubber sandwich structure is larger than that of the plastic sandwich structure,and increases with the increase of the sandwich thickness. The thinner the base layer,the greater the increase rate of the damping ratio of sandwich structure components.

关键词

动态特性模态分析锤击实验夹层结构阻尼比

Keywords

Dynamic characteristicsModal analysisHammering experimentSandwich structureDamping ratio

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