部分的な重なりを有する平板接合構造の簡易減衰推定法

Material type: その他

Author: 平居, 嵩朗ほか

Publisher: 一般社団法人日本機械学会

Publication date: 2014-05

Material Format: Digital

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Note (General)：: 出版タイプ： AOMechanical joints such as bolted and spot welded joints are widely used to join plate structures. The existence of contact interface in the j...

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Material Type: その他
Title: 部分的な重なりを有する平板接合構造の簡易減衰推定法
Author/Editor: 平居, 嵩朗
鞍谷, 文保
小出, 一志
城戸, 一郎
Author Heading: 平居, 嵩朗
鞍谷, 文保
小出, 一志
城戸, 一郎
Publication, Distribution, etc.: 一般社団法人日本機械学会
Publication Date: 2014-05
Publication Date (W3CDTF): 2014
Alternative Title: A simplified method for estimating damping of joined plate structures with partial overlap region
Periodical title: 日本機械学会論文集
No. or year of volume/issue: 80 812
Volume: 80
Issue: 812
Pages: 1-12
ISSN (Periodical Title): ISSN : 2187-9761
Subject Heading: Modal analysis
Finite element method
Damping
Mode shape
Contact analysis
Energy dissipation
Target Audience: 一般
Note (General): 出版タイプ： AO
Mechanical joints such as bolted and spot welded joints are widely used to join plate structures. The existence of contact interface in the joint increases the vibration damping in the structure because the energy dissipation due to friction occurs at the interface. In this paper, we propose a procedure for calculating the energy dissipation at the interface using finite element analysis to estimate the damping for the fundamental and the higher modes. We use the static contact analysis instead of the dynamic contact analysis to reduce computational effort and use the mode shapes of linear FE model of the joined plate structure as the forced displacement in the static contact analysis. This enables us to obtain the energy dissipation depending on the mode shape for each mode. To improve the calculation accuracy of the energy dissipation, we apply a surface load on the overlap (interface) region and find the necessary value of surface load. To validate the proposed procedure, the modal damping ratios estimated from the dissipated energy are compared with the measured damping ratios. The results show that the proposed procedure enables to accurately estimate the energy dissipation of the joined plate structure. The necessary surface load increases with increasing mode number and varies almost proportionally with the square of the angular frequency.
Related Material (DOI): 10.1299/transjsme.2014trans0075
https://doi.org/10.1299/transjsme.2014trans0075
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ