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The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary
Joint Authors
Li, Hui
Wen, Bangchun
Wang, Zhuo
Zhu, Mingwei
Xu, Zhuo
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-01-05
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
The influence on modal parameters of thin cylindrical shell (TCS) under bolt looseness boundary is investigated.
Firstly, bolt looseness boundary of the shell is divided into two types, that is, different bolt looseness numbers and different bolt looseness levels, and natural frequencies and mode shapes are calculated by finite element method to roughly master vibration characteristics of TCS under these conditions.
Then, the following measurements and identification techniques are used to get precise frequency, damping, and shape results; for example, noncontact laser Doppler vibrometer and vibration shaker with excitation level being precisely controlled are used in the test system; “preexperiment” is adopted to determine the required tightening torque and verify fixed constraint boundary; the small-segment FFT processing technique is employed to accurately measure nature frequency and laser rotating scanning technique is used to get shape results with high efficiency.
Finally, based on the measured results obtained by the above techniques, the influence on modal parameters of TCS under two types of bolt looseness boundaries is analyzed and discussed.
It can be found that bolt looseness boundary can significantly affect frequency and damping results which might be caused by changes of nonlinear stiffness and damping and in bolt looseness positions.
American Psychological Association (APA)
Li, Hui& Zhu, Mingwei& Xu, Zhuo& Wang, Zhuo& Wen, Bangchun. 2016. The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary. Shock and Vibration،Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1119183
Modern Language Association (MLA)
Li, Hui…[et al.]. The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary. Shock and Vibration No. 2016 (2016), pp.1-15.
https://search.emarefa.net/detail/BIM-1119183
American Medical Association (AMA)
Li, Hui& Zhu, Mingwei& Xu, Zhuo& Wang, Zhuo& Wen, Bangchun. The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary. Shock and Vibration. 2016. Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1119183
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119183