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정승현(Seung-Hyun Chung),최형길(Hyoung Gil Choi),이장무(Jang Moo Lee),박춘기(Choonki Park),조성선(Sung Sun Cho),정인승(Inseung Chung) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Damping shims are broadly used for the purpose of reducing the squeal noise of disc brake systems. Although the<br/> effects of the damping shims are well known practically, the analytical studies have not been carried out sufficiently.<br/> In this paper, we conducted the complex eigenvalue analysis of the finite element model of a brake system with<br/> several kinds of damping shims and investigated the effects of damping shims in variation of their material properties<br/> and contact conditions. Each damping shim was modeled as an equivalent single-layer instead of a multi-layered<br/> model. Also, noise dynamometer test were performed and the test results were in accordance with the analysis results.
정인승,윤진경 효성여자대학교 가정대학 학도호국단 1987 家政大論集 Vol.6 No.-
Cotton, rayon and PET which is commonly used for summer blouse fabrics, have been dyed indivi-dually. And the color fastness, in repeatedly trying man-made perspiration and laundering on eachfabric which had been dyed, and the staining degree against different fiber, were evaluated by estima-ting color differences. As perspiration disposal and times of laundering was increased, each fabrics of cotton and rayonwhich had been dyed with direct dyes was gradually becoming discolored in a great color differences.And each dyed fabrics stained more severely white cotton fabrics than white nylon fabrics. Dyed PET fabrics, which had been dyed with disperse dyes, showed the excellent fastness againstperspiration and laundering. And dyed PET fabrics stained more severely nylon fabrics than cottonfabrics. Therefore, as the color fastness of dyed fabrics and the staining degree against relative fiber werebecoming greatly different according to the kinds of fiber and dyes, these characteristics must beconsidered in the laundry.