http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유충준(Chung-Jun You) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
The elastic coupling system, which has a non-linear spring as an element and pendulum type absorber(PA) is studied numerically. The behavior ofthc elastic model shows non-lincar curves which is qualitatively similar to those of real clastic matcrials. The frequency-response curves show non-linear character and absorber effect.
열처리 본딩 기술을 이용한 Al6061/Al6061 및 Al6061/Sus304의 기계적 및 전기적 특성에 관한 실험적 연구
유충준(Chung-Jun You),정원채(Won-Chae Jung) 한국표면공학회 2008 한국표면공학회지 Vol.41 No.6
Al6061 and Sus304 materials are bonded by using thermal bonding technology. Al6061, Sus304 and thermal bonded Al6061/Al6061 and Al6061/Sus304 materials are characterized by using mechanical and electrical measurement. Especially the experimental characteristic data of thermal bonded Al6061/Al6061 and Al6061/Sus304 are not well known until today. We have investigated on Al6061, Sus304 and thermal bonded material. The thermal bonded material Al6061/Al6061 and Al6061/Sus304 can be used for the LCD frame and the other electrical products. For the future, we expect that the more various experiments should be needed to carry out for the data accumulation in the bonded new materials.
유충준(You, Chung-Jun) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.9
There is a noticeable hum from the inverter board of LCD TV when in operation. In this study, we investigate the source and the characteristics of this noise for the inverter board of LCD TV using measurement of vibration and noise. Modal analysis of vibration and noise is visualized for identification of noise sources and transmission vibration. The main source of noise was the transformer of the LCD TV inverter. A noise reduction was achieved by damping the structural elements.
이정우(Jung Woo Lee),유충준(Chung Jun You),이정윤(Jung Youn Lee) 한국소음진동공학회 2019 한국소음진동공학회 논문집 Vol.29 No.3
This paper presents a transfer matrix method to accurately determine the natural frequencies and mode shapes of the free vibration characteristics of a rotating Bernoulli–Euler beam with an elastic boundary condition (EBC) at its root. The proposed method can accurately determine the desired number of natural frequencies for such problems using a single element. The EBC is modeled for translational and rotational springs, and its effects are expressed in an independent transfer matrix. Structures with an EBC are altered according to the structures with other various conditions by appropriately controlling the stiffness values of the springs. The roots of the differential equation are solved for a bending vibration by applying the Frobenius method. In addition, the variation in mode shape depending on the change in the stiffness of springs is investigated in detail.
鄭晋鍾,兪忠濬 중앙대학교 기술과학연구소 1984 기술과학연구소 논문집 Vol.13 No.-
The vibration isolation in our environment is often very important. For the reduction of transmitted force or displacement, we adopt vibration isolators to such things as a vehicle and a lathe. Especially, rubber and rubber-like materials represent a class of materials that display highly elastic behavior. Under vibratory loading conditions, rubber-like materials are capable of absorbing energy which is partly stored (as in a spring) and partly dissipated (as in a dashpot) in internal friction like heat. Because of this character, rubber is mostly used as a cushioning and vibration isolating material in such applications as tires, belts and engine mounts. Usually the vibration isolators are composed of spring-dashpot system or rubber as mentioned above. For these kinds of vibration isolator, many research works have been reported. In this paper, vibration isolators such as rubber are used for experiment. The vibration source from sine-generator has frequency of 1 Hz to 130 Hz. The characteristics of the vibration isolators may be represented in terms of the amplitude of displacement, which is measured with an accelerometer, a frequence analyzer and an oscilloscope. The results are compared with a theory. The experimental value has a good agreement the theoretical one with a slight difference. So rubber's dynamic properties such as tensile storage modulus and tensile loss modulus, were able to be measured from vibration testing.