Vibration source description in substructuring: A theoretical depiction.

March 2, 2015 in

Journal Paper

D.J. Rixen
Anthonie Boogaard
M.V. van der Seijs
G. van Schothorst
G.W. van der Poel

DOI 10.1016/j.ymssp.2015.01.024


Mechanical Systems and Signal Processing
Volume 60-61, Pages 498-511

Publishing date: March 2015


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Analyzing the propagation of vibrational excitations from a source substructure to receiving components is an important issue in many high-tech engineering applications. Two equivalent and mutually dual methods to characterize a vibration source consist in determining either the force on its blocked interface or the vibration of its interface left free. Those source properties, together with information on the impedance (or admittance) of the system, allow predicting the coupled dynamic response of an assembly even though the detailed excitation origin in the source is not known. Despite the fact that the methods were already described more than fifty years ago, applying them in practical engineering problems remains challenging. The purpose of the present paper is to outline the blocked force and free velocity methods in a unified way, starting from the general notions of primal and dual assembly of impedances and admittances. An application example is shortly discussed.