Isolation Performance Analysis of a Porous Material Vibration Isolator

Abstract:

To explore the isolation mechanism and optimize the performance of the porous material in a dynamic viewpoint, a nonlinear porous material vibration isolator is modeled in this work. The stiffness of the isolator is regarded to be a piecewise linear, according to the stress–strain characteristics of porous material. Averaging method is employed to analyze the amplitude-frequency characteristics when the system excited by harmonic excitation. It is found that the vibration system represents linear, bilinear and tri-linear characteristics, when the porous material isolator works in linear-elastic phase, plateau phase and densification phase, respectively. The result shows that the amplitude response of the system in the plateau stage is much less than the linear isolator.

• Periodical: Applied Mechanics and Materials (Volume 741)
• Pages: 405-410
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.741.405
• Online since: March 2015
• Authors: Hua Bing Mao*, Yi Zhe Huang, Tie Liang Yang
• Keywords: Frequency Response, Nonlinear Vibration Isolator System, Porous Material

References

[1] R.A. Ibrahim. Journal of Sound and Vibration, 314 (2008) 371-452.

[2] B. Ravindra, A.K. Mallik. Journal of Sound and Vibration, 170 (1994) 325-337.

[3] A. Carrella, M.J. Brennan, T.P. Waters. Journal of Sound and Vibration, 301 (2007) 678-689.

[4] A. Carrella, M.J. Brennan, T.P. Waters, et al. International Journal of Mechanical Sciences, 55 (2012) 22-29.

[5] B.W. Skews, M.D. Atkins, M.W. Seitz. Journal of Fluid Mechanics, 253 (1993) 245 - 265.

[6] V.P.W. Shim, K.Y. Yap. International Journal of Impact Engineering, 19 (1997) 615-636.

[7] V.P.W. Shim, K.Y. Yap. International Journal of Mechanical Sciences, 39 (1997) 69-86.

[8] Q.M. Li, H. Meng. International Journal of Impact Engineering, 27 (2002) 1049-1065.