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Shock and Vibration
Volume 11 (2004), Issue 5-6, Pages 563-571

Transmissibility Matrix in Harmonic and Random Processes

M. Fontul, A.M.R. Ribeiro, J.M.M. Silva, and N.M.M. Maia

Instituto Superior Técnico, Departamento de Engenharia Mecânica, Av. Rovisco Pais, 1049-001 Lisboa, Portugal

Received 28 July 2003; Revised 7 January 2004

Copyright © 2004 Hindawi Publishing Corporation. 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.


The transmissibility concept may be generalized to multi-degree-of-freedom systems with multiple random excitations. This generalization involves the definition of a transmissibility matrix, relating two sets of responses when the structure is subjected to excitation at a given set of coordinates. Applying such a concept to an experimental example is the easiest way to validate this method.