A Method of Identifying the Characteristic Parameter of Material by Using Modal Test and Finite Element Analysis

Wang Lixin; Chen Linkai

doi:10.16578/j.issn.1004.2539.2018.12.028

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A Method of Identifying the Characteristic Parameter of Material by Using Modal Test and Finite Element Analysis

更新时间：2022-10-20

- A Method of Identifying the Characteristic Parameter of Material by Using Modal Test and Finite Element Analysis
- Vol. 42, Issue 12, Pages: 150-154(2018)
- 作者机构：
  
  1. 郑州大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2018.12.028
  CLC：
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[1]王立新,陈林凯.利用模态试验和有限元分析确定材料特性参数的方法[J].机械传动,2018,42(12):150-154.

Wang Lixin, Chen Linkai. A Method of Identifying the Characteristic Parameter of Material by Using Modal Test and Finite Element Analysis. [J]. 42(12):150-154(2018)
[1]王立新,陈林凯.利用模态试验和有限元分析确定材料特性参数的方法[J].机械传动,2018,42(12):150-154. DOI： 10.16578/j.issn.1004.2539.2018.12.028.

Wang Lixin, Chen Linkai. A Method of Identifying the Characteristic Parameter of Material by Using Modal Test and Finite Element Analysis. [J]. 42(12):150-154(2018) DOI： 10.16578/j.issn.1004.2539.2018.12.028.

摘要

以某型号行星齿轮减速器的箱体前壳零件为研究对象,采用LMS模态测试系统进行锤击法自由模态试验,用模态分析软件LMS Test. Lab对采集到的数据进行处理,识别出零件的前8阶固有频率和阻尼比,根据模态置信准则对得到的模态结果进行验证。结果表明,试验模态参数识别结果可靠。由于箱体具体材料、牌号未知,不能建立准确的有限元模型,而利用数值模拟和试验结合的手段,采用多因子正交试验法制定了试验参数组,最终得到了可靠的材料属性参数。

Abstract

Taking the front housing of a certain type of planetary gearbox as the research object. At first,by using the LMS modal test system,an impact hammer test on the front housing of gearbox is performed,which is hung with rubber bands to simulate the free boundary conditions. By processing the collected data with LMS Test. Lab software,the first 8 order natural frequencies and damping ratios of the front housing of gearbox are identified. The modal results are verified according to the modal confidence criterion,it turns out that the experimental modal parameters identification results are reliable. Since the specific materials and grades of the cabinet are unknown,the accurate finite element model can’t be established. Combining numerical simulation with experimentation,the experimental parameter set is established by using the multi-factor orthogonal test method,and finally the reliable material property parameters of the gearbox are obtained.

关键词

模态试验参数识别数值模拟正交试验

Keywords

Modal testParameter identificationNumerical simulationOrthogonal test

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