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김병삼,홍동표,정태진,Kim, Byoung-Sam,Hong, Dong-Pyo,Chung, Tae-Jin 한국음향학회 1994 韓國音響學會誌 Vol.13 No.2
회전하는 타이어의 표면진동에 의한 소음방사의 이론적인 모델에 대하여 연구하였다. 타이어를 원형링으로 가정하였고 정규주파수와 구조적인 손실계수를 고려하였다. 타이어 전표면에 대한 음압의 수치적분을 통하여, 타이어로부터 방사되는 음향파워를 계산하였다. 가진주파수와 손실계수를 고려한 계산 결과로부터 타이어 트레드 진동에 의한 음향방사를 감소시키기 위한 조건을 구하고자 하였다. A theoretical model is studied to describe the sound radiation by the surface vibration of in-service tires. The tire is modeled as a circular ring model. The effects of normalized frequency and structrual loss factor are included. Through numerical integration of the sound pressure, the radiated sound power is calculated as a fuction of normalized frequency and structural loss factor. The basic sound radiation mechanism is shown to be the damped progressive wave field on the structure in the vicinity of the applied force. The results indicate that the potential sound reduction might be obtained if values of normalized frequency and structural loss factor are investigated.
하이브리드 동력시스템을 적용한 트랙터의 동적 거동 및 내구해석
김병삼,임광규,Kim, Byeong Sam,Lim, Gwang Gue 한국자동차안전학회 2014 자동차안전학회지 Vol.6 No.2
This paper described on the motion of hybrid tractor trajectory for powertrain system. The dynamics behavior used to the tractor according to the characteristics of the road surface using $Daful^@$ analysis. The tractor industry is facing to a big problem about rising gas price and exhaust gas environment. Because it was possible overcoming the past drawback, hybrid vehicle had been decided as the best technical way since it has started operating the internal combustion engine with the electric power as the motive power. The vehicle structures have designed the model of a major power transmission factor. The simulation realized in this paper that motion of tractor being turned by torque and force of each joints. Driving characteristics, especially in recent years, IVHS (Intelligent Vehicle Tractor / System) technology, while receiving a lot of attention because of the tractor and the need to pursue high function is emerging as a more and more.
전면 도어 와이어하니스 시스템의 내구 수명 예측에 관한 연구
김병삼,임광규,Kim, Byeong Sam,Lim, Kwangkyu 한국자동차안전학회 2013 자동차안전학회지 Vol.5 No.2
In vehicle's door wiring harness (W/H) system is more toward to arrange a passenger compartment than a hinge and a weatherstrip. An opening/closing member of a vehicle is attached to a vehicle by a hinge in a manner enabling easy opening and closing of the opening/closing member. Such members include doors, such as side-doors and rear doors, and other opening/closing members, such as trunk lids. This article gives some insight into the dimensioning process, with special focus on large deflection analysis of wiring harness(W/H) in vehicle's door structures for durability problem. The Finite elements analysis for door wiring harness(W/H) is used for residual stresses and dimensional stability with bending flexible. Durability test data for slam test specimens were compared with the numerical predicted fatigue life for verification. The final testing of the component combines the effects of these microstructural features with the complex stress state arising from the combined service loading and residual stresses.
김병삼,정동근,김기석 ( Byong Sam Kim,Dong Geun Jung,Kiseok Kim ) 한국공업화학회 1997 응용화학 Vol.1 No.1
2-methyl-3`-hydroxy-1, 1`-diphenylamine was synthesized from the mixture consisting of 3-aminophenol, 3-nitrophenol, and 2-methyl cyclohexanone via vapor phase reaction on 5% Pd/C catalyst. Reaction was allowed to proceed at 203℃ for 5 to 10 hrs in an autoclave-type high pressure reactor. The optimal composition of the reaction mixture was 1 : 2 : 48 in the molar ratio of 3-aminophenol : 3-nitrophenol : 2-methyl cyclohexanone, and the highest yield of diphenylamine derivative was ca. 90% after 6 hrs of reaction time, based on the moles of aminophenol plus nitrophenol introduced. The rate-determining step of overall reaction was lydrogen-abstraction of the intermediate, N-cyclohexylideneaniline species, which was readily formed via condensation of aminophenol and excess cyclohexanone derivative. The hydrogen abstracted was transferred to nitrophenol, which was easily converted to aminophenol via reduction, thus replenishing the aromatic amine reactant for formation of the intermediate. The mechanism of overall reaction was in essence identical to that previously observed in formation of 2-methyl-4-methoxy diphenylamine, a raw-material of fluoran heat-sensitive dye.