Use of dFRFs for Identification of Travelling Wave Modes in Rotating Disks

[+] Author and Article Information
Myeong-Eop Kim

Samsung Motors Inc., San #50, Kongse-Ri, Kihung-Eup, Yongin-City, Kyungki-Do 449-900, Korea

Chong-Won Lee

Center for Noise and Vibration Control (NOVIC), Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town, Taejon 305-701, Korea

J. Vib. Acoust 120(3), 719-726 (Jul 01, 1998) (8 pages) doi:10.1115/1.2893889 History: Received September 01, 1995; Revised March 01, 1997; Online February 26, 2008


Use of the wave directional frequency response function (dFRF), which is composed of conventional frequency response functions, is proposed for identification of the forward and backward travelling wave modes of isotropic rotating disks. The driving point dFRF, which is a weighted sum of complex wave dFRFs defined in the complex wave coordinates, is also derived for separation of the forward and backward travelling wave modes in the frequency domain. Numerical examples of rotating disks are treated to demonstrate the analytical developments. Experiments with a laboratory rotating disk are also performed to verify the theoretical findings.

Copyright © 1998 by The American Society of Mechanical Engineers
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