Power Transmission Analysis between Two Flexible Subsystems Coupled by a Stiff Junction

Abstract:

This paper concerns the power transmissions between two flexible subsystems (i.e., with short-wavelength deformations) coupled by a stiff junction (i.e., with long-wavelength deformations). Typical examples of such built-up models are flexible plates connected via stiff beams, for instance. Research shows that, in general, the power flow exchanged between the two flexible subsystems decreases as the stiffness of their junction part increases. Conditions are then derived under which the power transmission between the two flexible subsystems can be neglected such that the statistical energy response of each individual subsystem can be predicted independently. It thus allows the mid-frequency vibration behavior of whole built-up model to be predicted in a very simple manner. A numerical example consisting of two short-wavelength plates connected via a long-wavelength beam is given to illustrate the validity of the present theory.

• Periodical: Applied Mechanics and Materials (Volumes 229-231)
• Pages: 915-918
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.229-231.915
• Online since: November 2012
• Authors: Ji Lin
• Keywords: Hybrid FE/SEA Method, Long-Wavelength Subsystem, Mid-Frequency Vibration, Power Transmission, Short-Wavelength Subsystem

References

[1] W. Desmet: Proceedings of ISMA, Vol. II (2002), p.835.

[2] P. J. Shorter and R.S. Langley: J. of Sound and Vib. Vol. 288 (2005), p.669.

[3] P. J. Shorter and R.S. Langley: J. Acoust. Soc. Am. Vol. 117 (2005), p.85.

[4] V. Cotoni, P. Shorter and R. Langley: J. Acoust. Soc. Am. Vol. 122 (2007), p.259.