A time-accurate explicit finite element code is used to predict the natural frequencies of a typical class of flexible multibody systems — automotive accessory belt-drives. The system considered consists of a belt, two pulleys, and a tensioner. Two techniques are used to find the system natural frequencies: (a) applying a sharp impulse to the system and extracting the system natural frequencies from the resulting displacement/strain time-histories via an FFT; and (b) applying a harmonic force to the system and sweeping through a frequency range, while at the same time, monitoring for large system response. In the present paper a comparison between these two techniques is presented for a typical accessory drive. Also, recommendations are offered on how to best use each technique to efficiently extract the system’s natural frequencies.
- Design Engineering Division and Computers and Information in Engineering Division
Prediction of System Natural Frequencies Using an Explicit Finite Element Code With Application to Belt-Drives
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Wasfy, T, Leamy, M, & Meckstroth, RJ. "Prediction of System Natural Frequencies Using an Explicit Finite Element Code With Application to Belt-Drives." Proceedings of the ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2: 28th Biennial Mechanisms and Robotics Conference, Parts A and B. Salt Lake City, Utah, USA. September 28–October 2, 2004. pp. 299-306. ASME. https://doi.org/10.1115/DETC2004-57117
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