The dynamic analysis of stochastic thin-walled structures under thermal–structural–acoustic coupling

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OriginalspracheEnglisch
Seiten (von - bis)609-634
Seitenumfang26
FachzeitschriftComputational mechanics
Jahrgang65
Ausgabenummer3
Frühes Online-Datum22 Okt. 2019
PublikationsstatusVeröffentlicht - März 2020

Abstract

Random dynamic analysis of the thin-walled structure subjected to coupling loads from three fields is addressed in the frame of the finite element method. Based on the proposed dynamic finite element equation of the deterministic structure under thermal–structural–acoustic coupling, when the randomness of structural physical parameters, temperature load and fatigue test data is fully considered, the dynamic responses of random structure subjected to coupling loads from three fields are dealt with by random factor method. The numerical characteristic values of the random temperature field and that of random dynamic responses are then derived through the moment method of random variables. Subsequently, the dynamic reliability of the stochastic structure under three-field coupling is evaluated using residual strength model, dynamic stress-intensity interference theory and the cumulative damage equal principle. Finally, the results from the methodology proposed are compared with that from Monte-carlo method for a case of numerical example, along with an inspection of the impacts of random variables on dynamic analysis results.

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The dynamic analysis of stochastic thin-walled structures under thermal–structural–acoustic coupling. / Ma, Juan; Liu, Bei; Wriggers, Peter et al.
in: Computational mechanics, Jahrgang 65, Nr. 3, 03.2020, S. 609-634.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Ma J, Liu B, Wriggers P, Gao W, Yan B. The dynamic analysis of stochastic thin-walled structures under thermal–structural–acoustic coupling. Computational mechanics. 2020 Mär;65(3):609-634. Epub 2019 Okt 22. doi: 10.1007/s00466-019-01786-0
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abstract = "Random dynamic analysis of the thin-walled structure subjected to coupling loads from three fields is addressed in the frame of the finite element method. Based on the proposed dynamic finite element equation of the deterministic structure under thermal–structural–acoustic coupling, when the randomness of structural physical parameters, temperature load and fatigue test data is fully considered, the dynamic responses of random structure subjected to coupling loads from three fields are dealt with by random factor method. The numerical characteristic values of the random temperature field and that of random dynamic responses are then derived through the moment method of random variables. Subsequently, the dynamic reliability of the stochastic structure under three-field coupling is evaluated using residual strength model, dynamic stress-intensity interference theory and the cumulative damage equal principle. Finally, the results from the methodology proposed are compared with that from Monte-carlo method for a case of numerical example, along with an inspection of the impacts of random variables on dynamic analysis results.",
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N1 - Funding Information: The first author gratefully acknowledges the support of Natural Science Foundation of China through the projects (Grant Nos. 11102143 and 11572233). The support of the Alexander von Humboldt Stifung is also gratefully acknowledged. Moreover, the authors would like to greatly appreciate Prof. Xue XD for his helpful suggestions and the contributions to the revision of this manuscript. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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N2 - Random dynamic analysis of the thin-walled structure subjected to coupling loads from three fields is addressed in the frame of the finite element method. Based on the proposed dynamic finite element equation of the deterministic structure under thermal–structural–acoustic coupling, when the randomness of structural physical parameters, temperature load and fatigue test data is fully considered, the dynamic responses of random structure subjected to coupling loads from three fields are dealt with by random factor method. The numerical characteristic values of the random temperature field and that of random dynamic responses are then derived through the moment method of random variables. Subsequently, the dynamic reliability of the stochastic structure under three-field coupling is evaluated using residual strength model, dynamic stress-intensity interference theory and the cumulative damage equal principle. Finally, the results from the methodology proposed are compared with that from Monte-carlo method for a case of numerical example, along with an inspection of the impacts of random variables on dynamic analysis results.

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