ON THE INVESTIGATION OF VIBRATION SIGNALS USING JOINT TIME FREQUENCY ANALYSIS. The 6th Saudi Engineering Conference, KFUPM, Dhahran, December 2002.
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Abstract
This paper addresses the problem of coupled blade bending and shaft torsional vibration signals using the Joint Time Frequency Analysis (JTFA). Simulation results for the blade bending and shaft torsional vibration are studied using the Fast Fourier Transform (FFT) and the JTFA. The FFT spectra showed little information on the nonlinear dynamic interaction between the blade bending and the shaft torsional vibration; and thus cannot be used as a tool for monitoring the blade vibration by looking into the shaft torsional vibration signal. In contrast, the JTFA in the form of Wigner Ville Distribution (WVD) has given more useful information and reflected the dynamic interaction between different vibration modes on one side and between the blade vibration and the shaft torsional vibration on the other side. The obtained WVD representations of the shaft torsional vibration showed frequency layers that represent blade vibration activity.
| Item Type: | Article |
|---|---|
| Subjects: | Mechanical |
| Department: | College of Engineering and Physics > Mechanical Engineering |
| Depositing User: | Users 4447 not found. |
| Date Deposited: | 04 Jun 2008 06:35 |
| Last Modified: | 01 Nov 2019 13:27 |
| URI: | http://eprints.kfupm.edu.sa/id/eprint/1708 |