Damage Identification of Truss Structures Based on Vibratory Data.

A theoretical analysis for the shear horizontal (SH) wave in a thin plate with the material nonlinearity has been conducted by using a microscopic scalar model. In the present study, the effects of the material nonlinearity and dispersion of the wave are taken into account. Especially, the influence of the material nonlinearity of second order is also considered in addition to that of third order. A governing equation which describes the behaviors of the SH wave is derived from the microscopic scalar model. Since the governing equation is complicated, some mathematical techniques are applied in order to analyze the behaviors of the SH wave. As a result, it is shown that the SH wave which can propagate through the thin plate without dissipation exists theoretically. The factors which have the effects on the propagation of the SH wave are revealed clearly. Moreover, the conditions which make the SH wave exist without the dissipation are shown analytically.

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An Effective Damage Identification Method for Large Truss Structures Containing Multiple Damaged Truss Members on the Basis of Successive Iteration Method of Bounding Domain

Aoki¹,

Sekine²

2004

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCE

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Damage identification methods using finite element methods need a long computational time for large and complex structures. In this paper, we develop an effective damage identification method for large truss structures containing multiple damaged truss members using a successive iteration method of bounding domain and a domain decomposition finite element technique. The subdomains of truss structures which contain damaged truss members are first determined by a flexibility method. The subdomains are subdivided into smaller subdomains using a successive iteration method of bounding domain, and finally the damaged truss members are identified. By conducting the damage identification for a large three-dimensional truss structure, it is recognized that the damaged truss members and their residual stiffnesses can be identified precisely and the present damage identification method can reduce the computational time.

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Damage Identification of Truss Structures Based on Vibratory Data.

Cited by 3 publications

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Damage identification of laminated composite structures based on dynamic residual forces

Damage identification of laminated composite structures based on dynamic residual forces

A Theoretical Analysis for the SH Wave in a Thin Plate

An Effective Damage Identification Method for Large Truss Structures Containing Multiple Damaged Truss Members on the Basis of Successive Iteration Method of Bounding Domain

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