|Reference : Working group 3- Identification of non-linear systems|
|Scientific journals : Other|
|Engineering, computing & technology : Mechanical engineering|
|Working group 3- Identification of non-linear systems|
|Golinval, Jean-Claude [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]|
|Kerschen, Gaëtan [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]|
|Lenaerts, V. [Université de Liège - ULG > Department of Aerospace, Mechanics and Materials > LTAS- Vibrations et identification des structures > >]|
|Thouverez, F. [>Ecole Centrale de Lyon, , > > > > Laboratoire de Méecanique > >]|
|Argoul, P. [>ENPC > > > > Laboratory of Material Analysis and Identification > >]|
|Mechanical Systems & Signal Processing|
|Academic Press Ltd Elsevier Science Ltd|
|Yes (verified by ORBi)|
|[en] structural dynamics ; diagnostics ; modelling non-linearity|
|[en] Researchers in structural dynamics have long recognised the importance of diagnosing and
modelling non-linearity. The last 20 years have witnessed a shift in emphasis from single
degree-of-freedom (sdof) to multi-degree-of-freedom (mdof) non-linear structural
dynamics. The main feature of the program of COST F3 Working Group 3 was to
identify the behaviour of a structure which exhibits a localised non-linear component.
Inside this working group, two benchmarks were defined and studied intensively, thereby
allowing to evaluate different identification methods and compare their efficiency and
specificity. For this purpose, a large amount of data (time and frequency measurements)
was collected and proposed to COST F3 participants. The two benchmarks that are
described in the following are:
* The VTT benchmark proposed by M. Juntunen from the VTT Technical Research of
* The ECL benchmark proposed by F. Thouverez from the Ecole Centrale de Lyon
The VTT benchmark is essentially one-dimensional but with a type of non-linearity that is
not known a priori. This is different from the ECL benchmark designed to implement a
cubic stiffness hardening but which address mdof systems. The ECL benchmark was
challenging in the sense that the considered structure is continuous and that several modes
participate in the response.
*Supported by a grant from the Belgian National Fund for Scientific Research.
# 2003 Elsevier Science Ltd. All rights reserved.
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