Damage identification in skeletal structures using the virtual distortion method in frequency domain

被引：31

作者：

Swiercz, Andrzej ^{[1
]}

Kolakowski, Przemyslaw ^{[1
]}

Holnicki-Szulc, Jan ^{[1
]}

机构：

[1] Inst Fundamental Technol Res, Smart Tech Ctr, PL-00049 Warsaw, Poland

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2008年 / 22卷 / 08期

关键词：

damage identification; inverse problem; frequency domain; skeletal structures; reanalysis methods;

D O I：

10.1016/j.ymssp.2008.03.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The paper is a continuation of research on the application of a structural reanalysis method-the virtual distortion rnethod-to structural health monitoring. The first approach, formulated previously in the time domain, suffered from a considerable numerical cost. In order to reduce it, this paper presents an alternative approach, formulated in the frequency domain thanks to the assumption of using harmonic excitation (quasi-static problem). The hardware devices supposed to collect structural responses are piezoelectric patch sensors. The software tool for damage identification solves a nonlinear least squares optimization problem by employing analytically derived sensitivities. Strains are the analyzed quantities, contributing to the objective function. Considerations are restricted to skeletal structures and a simplified dynamic problem with no damping. Effectiveness of the frequency-domain identification is demonstrated in numerical examples. Experimental verification is envisaged. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1826 / 1839

页数：14

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