Identification of electromechanical properties of piezoelectric structures through evolutionary optimisation techniques

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:49

Article

Montemurro, Marco^1,2  Nasser, Houssein¹  Koutsawa, Yao¹  Belouettar, Salim¹  Vincenti, Angela²  Vannucci, Paolo³ 

[1] Ctr Rech Publ Henri Tudor, L-1855 Luxembourg, Luxembourg

[2] Univ Paris 06, CNRS, Inst Alembert, UMR7190, F-75252 Paris 05, France

[3] Univ Versailles & St Quentin, F-78035 Versailles, France

关键词: Piezoelectric;    Optimisation;    Identification;    Active structures;    Genetic algorithms;   

DOI  :  10.1016/j.ijsolstr.2012.03.031

来源: Elsevier

【 摘 要 】

In this paper a non-destructive method to predict the whole three-dimensional set of electromechanical properties of active plate structures is presented. Since the elastic properties of the patches, along with their piezoelectric properties, have significant effect on the dynamic response of the global structure, the inverse problem of the identification of those properties is stated as a constrained minimisation problem of an error function expressing the difference between the measured eigenfrequencies and the corresponding numerical values. Thus, the adopted strategy relies on the dynamic response of the structure in terms of undamped natural frequencies and makes use of a global optimisation technique. To this purpose, a 3D finite element model is used to model the piezoelectric sensors, while an improved genetic algorithm is used as the optimisation tool in order to perform the solution search. The results are demonstrated through a simulated test case, that shows the accuracy of the method. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free