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Proceedings Paper

The dynamic characteristics of multi-ply bellows with finite element analysis and modal test
Author(s): Tae-Jin Chung; Won-Yong Cho
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Paper Abstract

Vehicle bellows is widely used in piping systems to absorb the vibration, heat and noise developed in expansion and contraction in the exhaust manifold. However, due to its complex structure, it is difficult to perform the finite element analysis. Therefore, from the theory of plate, equivalent thickness and density were supposed and applied in this paper to perform the finite element analysis. In addition, the experimental modal test was performed at 56 response points using an accelerometer and impact hammer. Modeling used in experiment was expressed by simple cylindrical shell. Nut tooled for smooth excitation was fixed to the top end of bellows. And fix the bottom land of bellows to the surface plate by Mix & Fix and Silicon. In this paper, natural frequency and mode shape were obtained by experiment and then be compared to the finite element analysis results to evaluate the dynamic characteristics of bellows. Through the modal test, it was shown that the results calculated by finite element analysis are comparable to those of measured experiment.

Paper Details

Date Published: 20 February 2006
PDF: 7 pages
Proc. SPIE 6041, ICMIT 2005: Information Systems and Signal Processing, 60412W (20 February 2006); doi: 10.1117/12.664484
Show Author Affiliations
Tae-Jin Chung, Kunsan National Univ. (South Korea)
Won-Yong Cho, Kunsan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 6041:
ICMIT 2005: Information Systems and Signal Processing
Yunlong Wei; Kil To Chong; Takayuki Takahashi, Editor(s)

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