Share Email Print
cover

Proceedings Paper

Three-dimensional shape reconstruction for modeling experimental spatial dynamic response
Author(s): David H. Coe; Robert L. West
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The conventional practice of building quantitative dynamic models from experimental data is based of measurements from surface mounted transducers, accelerometers. In this practice, the accelerometer is mounted on the 'actual' structure under test with known position and orientation completely determining the magnitude and direction of the response. Because of the mass loading and local stiffening of the structure by surface mounted transducers, noncontact measurements of the response by transducers, such as the laser Doppler vibrometer (LDV), are being developed. The scanning LDV is ideal for this task as it also makes it practical to acquire high spatial density dynamic response measurements. However, there are two fundamental problems that are unique to non-contact measurement transducers, like the LDV, that must be resolved before they can be used to develop quantitative dynamic models. The two fundamental issues are determining (1) the point on the structure at which the measurement is acquired and the direction from which it is measured and (2) the 'actual' shape of the structure under test to resolve issue one. This paper describes shape modeling techniques which resolve these fundamental problems and provide the means for reconstructing the three- dimensional (3-D) velocity field of a vibrating structure using a scanning laser Doppler vibrometer.

Paper Details

Date Published: 8 September 1994
PDF: 9 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185349
Show Author Affiliations
David H. Coe, Virginia Polytechnic Institute and State Univ. (United States)
Robert L. West, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

© SPIE. Terms of Use
Back to Top