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Shock and Vibration
Volume 2014, Article ID 284367, 15 pages
http://dx.doi.org/10.1155/2014/284367
Research Article

Mobility Matrix of a Thin Circular Plate Carrying Concentrated Masses Based on Transverse Vibration Solution

State Key Laboratory of Engines, Tianjin University, Weijin Road 92, Tianjin 300072, China

Received 30 November 2013; Accepted 6 July 2014; Published 7 August 2014

Academic Editor: Kumar V. Singh

Copyright © 2014 Desheng Li and Junhong Zhang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

When calculating the vibration or sound power of a vibration source, it is necessary to know the point mobility of the supporting structure. A new method is presented for the calculation of point mobility matrix of a thin circular plate with concentrated masses in this paper. Transverse vibration mode functions are worked out by utilizing the structural circumferential periodicity of the inertia excitation produced by the concentrated masses. The numerical vibratory results, taking the clamped case as an instance, are compared to the published ones to validate the method for ensuring the correctness of mobility solution. Point mobility matrix, including the driving and transfer point mobility, of the titled structure is computed based on the transverse vibration solution. After that, effect of the concentrated masses on the mechanical point mobility characteristics is analyzed.