通过实验模态分析设计阵列式压电模态传感器

朱峤,毛崎波

振动与冲击 ›› 2015, Vol. 34 ›› Issue (19) : 120-125.

PDF(2782 KB)
PDF(2782 KB)
振动与冲击 ›› 2015, Vol. 34 ›› Issue (19) : 120-125.
论文

通过实验模态分析设计阵列式压电模态传感器

  • 朱峤,毛崎波
作者信息 +

Design of modal sensors using PVDF array based on experimental modal analysis approach

  • ZHU Qiao , MAO Qi-bo
Author information +
文章历史 +

摘要

提出一种新的基于实验模态分析的阵列式压电模态传感器设计方法。首先利用PVDF阵列进行实验模态分析得到结构的曲率模态,然后直接将曲率模态振型函数在相应测量点的幅值作为加权系数,对结构进行模态滤波,得到各阶模态坐标,并加以实验验证。研究发现,利用本文方法设计阵列式压电模态传感器是可行的,而且该方法不需要进行复杂的数值计算,操作简单,模态滤波效果良好,可以很容易推广到二维复杂结构,具有较好的工程应用前景。

Abstract

By using experimental modal analysis approach, an experimental methodology for the design of modal sensors using PVDF array is presented. First, the curvature mode shapes (the second spatial derivatives of the mode shapes) of structure are directly obtained by experimental modal analysis using an array of rectangular PVDF patches, which were regularly arranged on the surface of structure. Then, the amplitudes of the curvature mode shape functions corresponding to the measurement point were taken as weights of PVDF array. So the weighted combinations of the PVDF outputs is proportional to the response of the target mode. Other modes are filtered out. Numerical simulation and experimental results show that the proposed method is effective and easy to operate. Furthermore, this method can be extended to two-dimensional structures and it has a good prospect of engineering application.
 

关键词

模态传感器 / PVDF薄膜 / 实验模态分析 / 模态滤波 / 曲率模态

Key words

 modal sensor / PVDF films / experimental modal analysis / modal filtering / curvature mode shapes

引用本文

导出引用
朱峤,毛崎波. 通过实验模态分析设计阵列式压电模态传感器[J]. 振动与冲击, 2015, 34(19): 120-125
ZHU Qiao,MAO Qi-bo. Design of modal sensors using PVDF array based on experimental modal analysis approach[J]. Journal of Vibration and Shock, 2015, 34(19): 120-125

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