Vibration testing of large scale nonlinear structures

J. M. Londono, J. E. Cooper, S. A. Neild

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)

Abstract

Vibration testing is used as a means of validating Finite Element models and also to measure modal damping. The classical approach typically assumes that the system is linear. With the need to improve system performance, aerospace and automotive structures are being designed with much lighter construction and also much less inherent damping, consequently structural nonlinearities have a much greater effect on performance. Although there has been significant effort towards the development of nonlinear modal analysis methodologies, these techniques are still not at a stage where they can be used on industrial size structures. This paper describes an experimental investigation on a structure with the characteristics of large scale weakly nonlinear industrial structure. It presents a procedure able to extract backbone curves from decay responses. This enables measurements to be made in regimes where nonlinear effects are more significant. Conclusions are drawn as to the most effective approaches for future developments and industrial application.

Original languageEnglish
Title of host publicationProceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics
PublisherKatholieke Universiteit Leuven
Pages1199-1210
Number of pages12
ISBN (Print)9789073802919
Publication statusPublished - 2014
Event26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014 - Leuven, Belgium
Duration: 15 Sep 201417 Sep 2014

Conference

Conference26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014
CountryBelgium
CityLeuven
Period15/09/1417/09/14

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