Transmissibility as a Differential Indicator of Structural Damage-Reference-Cited by-同舟云学术

Transmissibility as a Differential Indicator of Structural Damage

Published:2002-09-20 Issue:4 Volume:124 Page:634-641
ISSN:1048-9002
Container-title:Journal of Vibration and Acoustics
language:en
Short-container-title:

Author:

Johnson Timothy J.¹,Adams Douglas E.¹

Affiliation:

1. Purdue University, School of Mechanical Engineering, 1077 Ray W. Herrick Laboratories, West Lafayette, IN 47907-1077

Abstract

This article discusses the use of frequency domain transmissibility functions for detecting, locating, and quantifying damage in linear and nonlinear structures. Structural damage affects both the system poles and zeros; however, zeros are much more sensitive than poles to localized damage. This is because zeros depend on the input and output locations whereas poles do not. It is demonstrated here that since transmissibility functions are determined solely by the system zeros, they are potentially better indicators of localized linear and nonlinear types of damage. Furthermore, excitation measurements are not required to compute transmissibility functions so damage indices can be calculated directly from response measurements. It is also demonstrated that sensor arrays can sometimes be used to yield mixed transmissibility functions that are differential in nature, that is, they are less sensitive to gross fluctuations in the dynamic loading or environmental variables.

Publisher

ASME International

Subject

General Engineering

Link

http://asmedigitalcollection.asme.org/vibrationacoustics/article-pdf/124/4/634/5828157/634_1.pdf

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