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김병삼,Kim, Byeong-Sam 한국과학기술단체총연합회 1996 과학과 기술 Vol.29 No.6
지난 3월 미 캘리포니아서 열린 제35회 미국독성학회는 30여개국서 5천여명의 독성학자들이 참석해 1천8백여편의 논문이 발표되었다. 이 학술대회에 참석하고 돌아온 울산대 김병삼교수의 참관기를 싣는다.
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음장의 공간적 변환기법을 이용한 타이어 구조 진동 소음 측정
김병삼,Kim, Byoung-Sam 한국음향학회 1995 韓國音響學會誌 Vol.14 No.5
The Interaction between tire and road is responsible for the excited vibration of the tire, and It is also important for the sound radiation. In this paper. measurement of tire structural vibration noise from a chassis dynamometer using Spatial Transformation of Sound Field(STSF) technique is studied. STSF involving a scan that uses an array of transducers over a planar surface close to the source is under investigation. From cross spectra measurement during the scan, a principal component representing the sound field is extracted. Any power descriptor of the near field can then be investigated by means of near-field acoustic holography, while the distant field can be determined by application of Helmholtz integral equation. The results of the measurement were used to obtain the radiation sound pattern from the center line of the tire, and to locate the radiation sound generating regions in the vicinity of the tire.
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조화집중이동하중을 받는 무한보에서의 음향방사에 관한 연구
김병삼,태신호,홍동표 한국음향학회 1993 韓國音響學會誌 Vol.12 No.4
조화집중이동하중을 받는 무한보에서의 음향방사에 대한 연구는 선박, 비행기, 타이어 트레드 밴느 등과 같은 계의 설계시 계의 구조물로부터 발생하는 소음에 대한 해결방안을 제시해 준다. 구조물 표면에 발생하는 음향파워는 svktnqusghks방법을 이용하여 보의 전길이에 분포된 음향 인텐시티를 적분하여 구한다. 보의 표면에서 발생하는 음향파원는 미하수, 장력, 감쇠계수, 기초강성계수, 그리고 파수비에 의해서 결정된다. 각 인자에 따른 음향파워에 대한 정성적인 분석을 수행하기 위해 심프슨 적분방법을 이용하여 수치적분을 하였다. 무한보에 작용하는 유체하중에 3다라 진동에너지가 음향에너지로 변환되는 비율이 달라진다. 밀도가 큰 유체는 등가감쇠로 작용하여 보로부터 방사된 음향에너지는 빠르게 감소된다. 하중의 이동에 의하여 도플러이동효과가 발생하여 무한보의 공진부근에서의 음향파워 파크가 분리되고 보의 기초감쇠의 영향으로 음향에너지는 감소된다.
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김병삼 한국음향학회 2000 韓國音響學會誌 Vol.19 No.5
Quickness and precision are the two most important requirements for an industrial scale used in production lines. In this paper, a new approach, "Mass-estimation algorithm by vibration-response measurement of dynamic balance", is presented to improve some of drawbacks in conventional scales. The system, consisted of velocity and displacement sensors, spring scale, analog-digital converter and microcomputer, is based on full utilization of dynamic mass measurement of velocity and displacement via microcomputer-assisted real time monitoring. The resulting system, when combined with appropriate mass estimation algorithm software, has shown its effectiveness in terms of two desirable characteristics required.
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하중을 받고 회전하는 승용차 타이어의 반경방향 고규진동수 측정에 관한 실험적 연구
김병삼,홍동표,지창헌,Kim, Byoung-Sam,Hong, Dong-Pyo,Chi, Chang-Heon 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.1
The measurement of radial directional natural frequency ina passenger car tire rotating under the load is studied. In order to obtain theoretical matural frequency and mode shape, the ploane vibration of a tire is modeled to that of circular beam. By esing the Tieking method based on Hamiltons's principle, theoretical results are determined by considering tension horce due to tire inflation pressure, retational velocity and tangential, radial stiffness. Radial directional modal parameters varying with the inflation pressure, load, rotational velocity are experimentally determined by using frequency response function method. The results show that experimental conditions canbe considered as the parameters which shift the natural frequency.
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김병삼,문상돈 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
To take appropriate measures how to reduce the influence that vibration and noise occurring on the railroad have on neighboring facility is an important issue. And if the vibration raised by the train travelling is input a building structure, its vibration and noise will affect on the building as a whole. In particular, the structure-borne noise, which raises the problem of noise by the vibration propagated into the inside of structural body and the sound radiated from the surfaces of interior wall, floor and ceiling, etc, has a complicated characteristics that repeats the increase and decrease during the process of vibration and sound transfer, it is not easy to take measures. From this situation, the level of noise radiation was reviewed by using the vibration data actually measured to understand the level of structure-borne noise that has been focused as a cause of civil appeals from the residents located railroad vicinity.
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김병삼,임경호,나양기,김희곤,김월수 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-
This study was carried out to investigate the effects of root pruning methods for tree vigor stability and flower bud differentiation of 'Sunaga Wase' peach. The treatment was one side 10㎝, 20㎝ and both sides 10㎝, 20㎝ depth under canopy in after summer pruning. Among the treatment, canopy volume was 0.26㎥ lower than non-treatment and flower bud differentiation and Fruit yield increased 18.8%, 9% on both sides root pruning 20㎝ depth, therefore suitability root pruning method of density peach tree was both sides root pruning 20㎝ depth.
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