基于理论、仿真和实验的两端固定梁的模态测试方法
DOI:
作者:
作者单位:

南昌航空大学 飞行器工程学院

作者简介:

通讯作者:

中图分类号:

O326;O343

基金项目:

国家自然科学(11372125),江西省自然科学(20161BAB101005),航空科学(2017ZA56001)


Modal testing method of fixed beams at both ends based on theory, simulation and experiment
Author:
Affiliation:

School of Aircraft Engineering,Nanchang HangKong University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    基于欧拉-伯努利梁理论,得到两端固定梁自由振动的振型函数。通过数值计算得出实验用的两端固定梁前五阶振型的节点位置及其与梁长的比值。考虑传感器对两端固定梁固有频率的影响,建立梁-传感器模型进行仿真分析并得出两端固定梁前五阶固有频率。基于节点位置和测点位置,在实验中选择参考点。将具体实验的结果与梁-传感器仿真模型结果进行对比,通过前五阶固有频率的误差分析,发现仿真分析结果与实验结果误差最高为2.92%。研究完整地叙述了两端固定梁的模态测试流程,可为工程技术人员的模态测试起一定的指导作用。

    Abstract:

    Based on Euler-Bernoulli beam theory, the modal shape function of the beam in the free vibration state are obtained. The joint position of the first five modes of the fixed beam at both ends and its ratio to the length of the beam are obtained by numerical calculation. Considering the influence of sensor on the natural frequency of two ends fixed beam, a beam-sensor model is established to obtain the first five natural frequencies of two ends fixed beam. the reference point of modal experiment is chosen in experiment based on the node position and measuring point position. Comparing the results of beam-sensor simulation mode with specific experiments, it is found that the maximum of these two results error is 2.92% by error analysis of first five order natural frequencies. The research provide a theoretical basis for engineering technicians to determine the location of nodes in the modal experiment, and give the selected method of exciting point in the specific experiment.

    参考文献
    相似文献
    引证文献
引用本文

刘永春,赵艳影. 基于理论、仿真和实验的两端固定梁的模态测试方法[J]. 科学技术与工程, 2019, 19(35): 34-40.
Yongchun Liu, Yanying Zhao. Modal testing method of fixed beams at both ends based on theory, simulation and experiment[J]. Science Technology and Engineering,2019,19(35):34-40.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-05-21
  • 最后修改日期:2019-08-31
  • 录用日期:2019-07-18
  • 在线发布日期: 2020-01-02
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注