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Structural Engineering and Mechanics Volume 51, Number 4, August25 2014 , pages 643-650 DOI: https://doi.org/10.12989/sem.2014.51.4.643 |
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Numerical investigation on multi-degree-freedom nonlinear chaotic vibration isolation |
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Guoping Jiang and Weijun Tao
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| Abstract | ||
| A chaotic vibration isolation system is designed according to the chaotic vibration theory in this paper. The strong nonlinearity is generated by the system. Line spectra in the radiated noise maybe easily detected caused by marine vessels. It is Important to reduce the line spectra by improving the acoustic stealth of marine vessels. A multi-degree-freedom (MDF) nonlinear vibration isolation system (NVIS) system is setup by the experiment and finite element method. The model is established with finite element method. The results show that the behavior of the device gradually varies from period bifurcation into chaotic state and the line spectrum is changed from single spectral structure into broadband spectral structure. It is concluded that chaotic vibration isolation is preferable contrasted on line spectra isolation. | ||
| Key Words | ||
| chaos; nonlinear system; vibration isolation; multi-degree-freedom | ||
| Address | ||
| Guoping Jiang and Weijun Tao : School of Engineering, Fujian Jiangxia University, Fuzhou, Fujian 350108, China | ||