On the use of the transmissibility concept for the evaluation of frequency response functions

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Abstract

The dynamic characteristics of a structure are often derived from a set of measured frequency response functions (FRFs). However, it may happen that the measurement of certain FRFs is impossible, as they are related to some points of interest that may become physically accessible in operational conditions. In this circumstance, it is useful to have some tools that can provide the prediction of such dynamic information. The transmissibility concept can play an important role to circumvent these situations. In fact, there are important properties associated to the transmissibility - the relationship between two sets of responses, for a given set of applied forces, extended to a general multiple degree-of-freedom system. In this paper, some important properties of the transmissibility matrix will be presented. Additionally, it will be shown that if a modification is operated on the original system - using both theoretical and experimental models - it is possible to estimate the FRFs associated to the unknown co-ordinates without the necessity of measuring the responses on those co-ordinates.

Original languageEnglish
Title of host publicationProceedings of ISMA 2010 - International Conference on Noise and Vibration Engineering, including USD 2010
EditorsP. Sas, B. Bergen
PublisherKatholieke Universiteit Leuven
Pages3303-3315
Number of pages13
ISBN (Electronic)9789073802872
Publication statusPublished - 2010
Event24th International Conference on Noise and Vibration Engineering, ISMA 2010, in conjunction with the 3rd International Conference on Uncertainty in Structural Dynamics, USD 2010 - Leuven, Belgium
Duration: 20 Sep 201022 Sep 2010

Conference

Conference24th International Conference on Noise and Vibration Engineering, ISMA 2010, in conjunction with the 3rd International Conference on Uncertainty in Structural Dynamics, USD 2010
CountryBelgium
CityLeuven
Period20/09/1022/09/10

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