Nondestructive inspection of a lead rubber bearing using ultrasonic wave

Yutaka Yoneda, Akira Mita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

At first, two kinds of miniature LRB models are prepared, one model has normal lead damper, the other has abnormal one. And they are scanned by ultrasonic wave using ultrasonic transducers and AE sensors. The output signals obtained through the inside are different from each other. Infinite route is assumed as ultrasonic wave propagation line. But, in this examination, we found that the main route is some layers of steel. Then, the tomography construction is adopted to detect the condition of lead plug in one layer of steel plate. The full acoustic wave solution in an arbitrary two-dimensional object is computed, which is subjected to specified acoustic sources and material parameters. This algorithm is basically a finite difference method. As a result, it is successful to know about ultrasonic wave propagation in one layer of steel and consistent correlation with the output signal. The feature vectors are created by calculation of second power average of the amplitude, and these vectors are used as the data for pattern recognition on the basis of these information. The accuracy of pattern recognition is significantly enhanced in consistent correlation with the condition of lead plug. In this study, active damage detection method to evaluate the status of LRB was proposed. It is possible to evaluate internal states of LRB by using ultrasonic wave.

Original languageEnglish
Title of host publicationSmart Structures and Materials 2006 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
DOIs
Publication statusPublished - 2006 Jul 20
EventSmart Structures and Materials 2006 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems - San Diego, CA, United States
Duration: 2006 Feb 272006 Mar 2

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6174 I
ISSN (Print)0277-786X

Other

OtherSmart Structures and Materials 2006 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
CountryUnited States
CitySan Diego, CA
Period06/2/2706/3/2

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Keywords

  • Lead Rubber Bearing (LRB)
  • Nondestructive inspection
  • Ultrasonic wave propagation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Yoneda, Y., & Mita, A. (2006). Nondestructive inspection of a lead rubber bearing using ultrasonic wave. In Smart Structures and Materials 2006 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems [61740J] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6174 I). https://doi.org/10.1117/12.658943