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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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초록· 키워드
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Recent diesel engine has achieved high speed running comparable to that of gasoline engine as a speed improvement effort.
Consequently, torsional vibration of high-speed diesel engine induced vibration nosise, reduced horsepower and the like,
Viscous damper which is thought to be effective in curtailing the torsional vibration was studied over a wide range of speed. In this investigation, a water cooling, 4-cycle high-speed die
sel engine (Max. 3500 rpm) was used for the study.
Theoretical analysis was made by assuming the engine to be an ideal equivalent system (Iength, moment of inertia) i.e.the multi-degree of freedom equivalent torsional vibration system with damper Was analyzed.
In the analysis, the inertia moment of suitable damper for this experiment Was calculated by varying the relative damping coefficient of damper of engine for each damper. Furthermore, in
the torsional vibration experiment, the torsional vibration amplitude of the crankshaft system was measured when the engine was equipped with dampers of different moments of inertia and
also when the engine was equipped without dampers. The experimental results were compared with the analytical values and were found to be satisfied. The results of this investigation are summarizd below:
(1) It was found that for the engine equipped with dampers, the torsional vibration amplitude was reduced to about one third of those without dampers.
(2) The optimum value of inertia moment of viscous damper for the engine was found to be about Id=1.05 (kgㆍcmㆍs²)
(3) The optimum damping coefficient and the ratio of moment of inertia for the engine were found to be about Cd≒850 (kgㆍcmㆍs), Rd=0.509, respectively(B1 dapmper).
Consequently, torsional vibration of high-speed diesel engine induced vibration nosise, reduced horsepower and the like,
Viscous damper which is thought to be effective in curtailing the torsional vibration was studied over a wide range of speed. In this investigation, a water cooling, 4-cycle high-speed die
sel engine (Max. 3500 rpm) was used for the study.
Theoretical analysis was made by assuming the engine to be an ideal equivalent system (Iength, moment of inertia) i.e.the multi-degree of freedom equivalent torsional vibration system with damper Was analyzed.
In the analysis, the inertia moment of suitable damper for this experiment Was calculated by varying the relative damping coefficient of damper of engine for each damper. Furthermore, in
the torsional vibration experiment, the torsional vibration amplitude of the crankshaft system was measured when the engine was equipped with dampers of different moments of inertia and
also when the engine was equipped without dampers. The experimental results were compared with the analytical values and were found to be satisfied. The results of this investigation are summarizd below:
(1) It was found that for the engine equipped with dampers, the torsional vibration amplitude was reduced to about one third of those without dampers.
(2) The optimum value of inertia moment of viscous damper for the engine was found to be about Id=1.05 (kgㆍcmㆍs²)
(3) The optimum damping coefficient and the ratio of moment of inertia for the engine were found to be about Cd≒850 (kgㆍcmㆍs), Rd=0.509, respectively(B1 dapmper).
목차
Abstract
1.序論
2.비틀림振動의 理論解析
3.비틀림振動의 實驗
4.理論解析結果와 實驗結果와의 比較檢討
5.結論
參考文獻
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이 논문의 저자 정보
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