Application of uncertainty analysis in structural dynamics

• Autorzy: Martowicz A. , Pieczonka Ł. , Uhl T.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with the application of uncertainty analysis in structural dynamics. The usage of soft computing method, namely Genetic Algorithms (GA), is presented to show effective computational technique that allows for assessing the propagation of defmed uncertainties in modelled mechanical structure. Tested method is capable of finding variation of eigenfrequencies of Finite Element models and is based on scanning of interval global system matrices. During this process combination of values of input design parameters are found for which extremes of frequencies of vibration appear. FE model of windscreen, made available by Renault Technocentre, has been anafysed. Assumed uncertainties have taken. into account variability of material properties, geometrical characteristics and environmental conditions. Fuzzy theory together with alpha-cut strategy has been applied for modelling uncertain parameters. Sensitivity analysis has been performed to investigate the contribution effect introduced by each assumed input parameter to studied frequency of vibration. Obtained results have been presented and discussed within the context of referential results yielded from Monte Carlo simulation and GA used directly for the search of frequency extremes. Finally, observed time savings have been mentioned to justify the usage of tested computational method.

Słowa kluczowe

EN

structural dynamics; uncertainty analysis; eigen problem; finite element method; genetic algorithms

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2008
• Tom: Vol. 15, No. 1
• Strony: 153--167
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Martowicz A.

autor

Pieczonka Ł.

autor

Uhl T.

• AGH University of Science and Technology, Department of Robotics and Mechatronics Al. Mickiewicza 30, 30-059 Cracow, Poland tel: [phone],fax: [phone],

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