2-CHANNEL LASER VIBROMETER TECHNIQUES FOR VIBRATIONAL INTENSITY MEASUREMENTS .1. FLEXURAL INTENSITY

被引：14

作者：

MCDEVITT, TE

KOOPMANN, GH

BURROUGHS, CB

机构：

[1] Applied Research Laboratory, Pennsylvania State University, PA, 16804, P.O. Box 30, State College

[2] Department of Mechanical Engineering, Pennsylvania State University, University Park, PA, 16802

来源：

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 1993年 / 115卷 / 04期

关键词：

D O I：

10.1115/1.2930369

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A laser technique which measures vibrational energy flow (intensity) via propagating bending waves is described. A pair of scanning laser beams from a two-channel laser vibrometer is used to provide a nonintrusive measurement of the intensity at various points on a vibrating beam. Results are shown to compare well with those of two additional techniques. These techniques, used for validation, employ a single laser beam and can only be used at resonance frequencies in beams or rods. The two-channel laser technique described can be applied to two-dimensional intensity measurements, is not limited to single frequency excitation, and has an inherent capability to facilitate phase error elimination via a photodetector switching technique which is also described.

引用

页码：436 / 440

页数：5

共 12 条

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