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An Experimental Study on Placements and Thickness of Damping Material for Vibration Control of Automotive Roof  

Lee, Jeong-Kyun (Student, Graduate School of Automotive Engineering, Kookmin University)
Kim, Chan-Mook (Graduate School of Automotive Engineering, Kookmin University)
Sa, Jong-Sung (Dept. of Automotive Engineering Seoil College)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.6, 2005 , pp. 31-37 More about this Journal
Abstract
This paper presents an experimental study on vibration characteristics of an automotive roof with damping material. The goal of the study is to extract modal parameters(natural frequency, loss factor, and mode shape) of automotive roof with damping materials treatment. To determine the effective positions and thickness of the damping material on a roof, vibration tests have been carried out for six cases; an aluminum plate with damping material on maximum strain energy positions, and an aluminum plate with damping material on nodal lines. From the result of aluminum plate, it is found that the damping material should be placed on the location with maximum strain energy part. For the automotive roof, patches of constrained damping material, which has two different density, have been attached to the positions of the maximum strain energy with four kinds of thicknesses. This paper shows that the proper positioning of the damping material is very important and the effective thickness is about twice that of the roof panel.
Keywords
Automotive roof; Vibration characteristics; Loss factor; Damping material; Passive vibration control; Constrained layer damping;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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