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.
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收藏
页码：436 / 440
页数：5
相关论文
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