http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
디스크 브레이크에서 열섬에 의한 브레이크 압력과 진동의 변화
김명구(Myoung-Gu Kim),조종두(Chongdu Cho),이용산(Yong-San Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In automotive brake disk, hot spot on disk surface causes a local contact friction between the disk surface and the disk pad. This non-uniform contact friction worsens the local heat concentration on the disk surface. The nonuniform contact caused by hot spot affects the disk pad, through which it affects the oil pressure system of the disk. The pressure change in the oil pressure system then affects the hot spot on the disk surface through the pad in tum. There is a correlation between the vibration due to the contact friction and the pressure change in the disk brake and research is needed on hot spot on a disk brake and the pressure change in an oil pressure system.
김명구(Kim, Myoung-Gu),박철희(Pak, Chul-Hui),조종두(Cho, Chong-Du) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.7
The response characteristics of one to one resonance on the quadrangle cantilever beam in which basic harmonic excitations are applied by nonlinear coupled differential-integral equations are studied. This equations have 3-dimensional non-linearity of nonlinear inertia and nonlinear curvature. Galerkin and multi scale methods are used for theoretical approach to one-to-one internal resonance. Nonlinear response characteristics of 1st, 2nd, 3rd modes are measured from the experiment for basic harmonic excitation. From the experimental result, geometrical terms of non-linearity display light spring effect and these terms play an important role in the response characteristics of low frequency modes. Nonlinear nitration in the out of plane are also studied.
김명구(Myoung-Gu Kim),박철희(Chul-Hui Pak),조종두(Chong-Du Cho),박창호(Chang-Hao Piao) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Experimental and theoretical study of the non-planar response motions of a circular cantilever beam subject to base harmonic excitation has been presented in this paper work. Theoretical research is conducted using two non-linear coupled integral-differential equations of motion. These equations contain cubic linearities due do curvature term and inertial term. A combination of the Galerkin procedure and the method of multiple scales are used to construct a first-order uniform expansion for the case of one-to-one resonance. The results show that the non-linear geometric terms are very important for the low-frequency modes of the first and second mode. The non-linear inertia terms are also important for the high-frequency modes. We present the quantitative and qualitative results for non-planar motions of the dynamic behavior.