Detection of Machinea and Structure Assemblies with Bolt Looseness
Abstract
Machine and structural safety and reliability are important issues in engineering. Since self-looseness is one of the most frequent causes of failure in bolted joint structures, it is highly desirable to detect bolted joint looseness early. The focus of this study is to model the structure natural frequency variation as the bolted joint is loosened. A virtual spring approach, incorporating finite element analysis, is proposed to model bolted structure assemblies. The spring constant estimation based on the Hertz theory is addressed, and the relationship between the spring constant and structure natural frequency is presented. An experimental study is used to verify the analytical model. A load bolt is used to measure the existing force in a bolted joint. The changes in the natural frequency of fixed-fixed beams due to the presence of joint looseness were investigated both analytically and experimentally.
Recommended Citation
J. H. Yeh and F. W. Liou, "Detection of Machinea and Structure Assemblies with Bolt Looseness," Proceedings of the ASME Design Engineering Technical Conference, vol. 5, pp. 1 - 7, American Society of Mechanical Engineers, Jan 2000.
The definitive version is available at https://doi.org/10.1115/DETC2000/RSAFP-14466
Department(s)
Mechanical and Aerospace Engineering
International Standard Book Number (ISBN)
978-079183515-9
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Society of Mechanical Engineers, All rights reserved.
Publication Date
01 Jan 2000
Comments
National Science Foundation, Grant BCS-9302201