A Study Of Deck Vibration With Nonlinear Supports

• Main Authors: Ming-Hsiang Chang, 張銘祥
• Other Authors: 王怡仁
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/04799474496505325350

碩士 === 淡江大學 === 航空太空工程學系碩士班 === 96 === In this research, an optimized position of a set of 2 mass-spring-damper vibration absorbers is proposed for a vibration mechanism device (such as optical disk drive or other mechanical vibration deck system). This vibration system is simulated by a rigid body deck with 4 corners supported by cubic springs. Only out-of-plane motions are considered in this research. 2 point-mass absorbers are attached under this deck. A nonlinear 3-D theoretical model for this system is established by Lagrange’s equation. The asymptotic analytical solution is obtained by the multiple time scale analysis. The IMSL © subroutine is employed for solving nonlinear system frequency response. The fixed points semi-analytic results in frequency domain are also acquired. Correlation is made in frequency domain to ensure the accuracy of our model. This research provides a theoretical background for the preliminary vibration reduction design for industries. It is found that the existing vibration deck amplitude and unsteady region can be reduced by simply adding the absorbers at the end corner of the deck, without changing the main configurations. This will not only save costs but also increase testing efficiency, achieving the most cost-effective vibration reduction result.