Damping mechanism in spot welded structures and its modeling in frequency domain

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560257
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: University of Fukui
• Principal Investigator: KURATANI FUMIYASU 福井大学, 工学(系)研究科(研究院), 教授 (00294265)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 振動解析 / 接合構造 / 有限要素法 / モード解析 / 接触解析 / 減衰 / 摩擦

Outline of Final Research Achievements

The existence of spot welded joints increases the vibration damping in the structure due to friction at the interface. In this study, a joined plate structure with partial overlap region is used as the test structure. First, the reason why each mode has different damping characteristics is discussed based on the mode shapes. Next, a procedure for estimating damping characteristics depending on each mode shape is proposed using finite element static contact analysis. Finally, a damping model for predicting damping characteristics in frequency domain is presented.

Free Research Field

機械工学，機械力学・制御，モード解析