IN-PLANE MODAL TESTING OF A FREE ISOTROPIC PLATE USING LASER DOPPLER VIBROMETER MEASUREMENTS

被引：2

作者：

Batista, F. B. ^{[1
]}

Fabro, A. T. ^{[1
]}

Coser, L. F. ^{[1
]}

Arruda, J. R. F. ^{[1
]}

Albuquerque, E. L. ^{[2
]}

机构：

[1] Univ Estadual Campinas, Fac Mech Engn, BR-13083970 Campinas, SP, Brazil

[2] Univ Brasilia, Fac Technol, BR-70910900 Brasilia, DF, Brazil

来源：

9TH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER AND NONCONTACT TECHNIQUES AND SHORT COURSE | 2010年 / 1253卷

基金：

巴西圣保罗研究基金会;

关键词：

in-plane vibration; laser Doppler vibrometer; modal analysis;

D O I：

10.1063/1.3455475

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work an experimental procedure is proposed to obtain the lowest free in-plane vibration modes of an aluminum plate. Responses are measured along two longitudinal directions on the plate surface at selected points by an out-of-plane laser Doppler vibrometer set up to measure in-plane vibrations. Excitation is made at one specific point of the plate edge using a light impact hammer. The plate is supported by silicone spheres to simulate the free edge boundary conditions and ensure a stable stationary position in order to keep the laser focus distance. Numerical finite element simulations are carried out to compute the in-plane modes and frequencies in order to compare them with the corresponding experimental results. The identified experimental modes agree very well with the numerical predictions. The smooth in-plane modes can be used to identify the plate material constitutive model parameters using existing methods proposed elsewhere by the authors.

引用

页码：333 / +

页数：2