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Technical Briefs

Estimating Severity of Damage in Lattice Structures Utilizing Substructure Modal Data

[+] Author and Article Information
Hui Fang1

Institute of Structural Mechanics, China Academy of Engineering Physics, Mianyang 621900, Chinahuifang@mail.xjtu.edu.cn

1

Corresponding author.

J. Vib. Acoust 133(3), 034502 (Mar 31, 2011) (5 pages) doi:10.1115/1.4003275 History: Received February 02, 2009; Revised September 16, 2010; Published March 31, 2011; Online March 31, 2011

This paper newly develops a method for the damage severity estimate for lattice structures based on the employment of the substructure potential energy (SPE). While all existing damage severity estimation methods that utilize modal data are either employing an iterative solution procedure or requiring spatially complete information, the SPE method is an exact, noniterative solution method and only requires substructure modal data. The performance of the proposed method is presented for beam-type and plate-type lattice structures based on synthetic data generated from finite element models.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Equivalent system with repetition characteristic

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Figure 2

The sketch of the plate-type lattice structure (a) and cell (b)

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Figure 3

The first mode of the undamaged structure (a), the second mode of the undamaged structure (b), the third mode of the undamaged structure (c), the fourth mode of the undamaged structure (d), the fifth mode of the undamaged structure (e), and the sixth mode of the undamaged structure (f) (plate-type lattice structure)

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