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Shock and Vibration
Volume 3, Issue 2, Pages 135-140
http://dx.doi.org/10.3233/SAV-1996-3207

Mapping Nonsquare and Unevenly Spaced 2-D SLDV Data of an Aircraft Fuselage by Using Spatial DFT-IDFT Techniques

William Xinzuo Li,1 Larry D. Mitchell,1 Min-Fu Lu,1 and Michael L. Neumann2

1Virginia Polytechnic Institute and State University, Department of Mechanical Engineering, Blacksburg, VA 24061-0238, USA
2Newport News Shipbuilding, Newport News, VA 23607, USA

Received 29 December 1994; Accepted 1 September 1995

Copyright © 1996 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The scanning laser Doppler vibrometry (SLDV) technique provides velocities of a structure at 2-dimensional (2-D) angularly evenly spaced (in the laser scanning sense) data points. This causes an unevenly spaced data point distribution on the surface of the test structure. In many cases evenly spaced data point distribution with square or rectangular grids is highly desirable. In this study the SLDV velocity data of a partial surface area of an aircraft fuselage were mapped to truly spatial evenly spaced coordinates by using the spatial DFT-IDFT technique with minimum distortion. This 2-D data mapping technique certainly is not limited to the fuselage, hut can he very useful for many other 3-D structures.