Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2007.05a
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- Pages.416-422
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- 2007
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- 1598-2548(pISSN)
Fatigue Strength Analysis of Propulsion Shafting System with Two Stroke Low Speed Diesel Engine by Torsional Vibration in Frequency Domain
주파수 영역에서 비틀림진동에 의한 저속 2행정 디젤엔진을 갖는 추진축계의 피로강도 해석
Abstract
Prime movers in most large merchant ships adapt two stroke low speed diesel engine which has higher efficiency, mobility and durability. However, severe torsional vibration in these diesel engines may be induced by higher fluctuation of combustion pressures. Consequently, it may lead sometimes to propulsion shafting failure due to the accumulated fatigue stresses. Shaft fatigue strength analysis had been done traditionally in time domain but this method is complicated and difficult in analysing bi-modal vibration system such as the case of cylinder misfiring condition. In this paper authors introduce an assessment method of fatigue strength estimation for propulsion shafting system with two stroke low speed diesel engine in the frequency domain.
Keywords
- Dirlik Method;
- Frequency Domain;
- Power Spectral Density;
- Probability Density Function;
- Propulsion Shafting System;
- Fatigue Strength;
- Torsional Vibration;
- Two Stroke Low Speed Diesel Engine
- Dirlik 법;
- 주파수 영역;
- 파워 스펙트럼 밀도;
- 확률 밀도 함수;
- 추진축계;
- 피로 강도;
- 비틀림 진동;
- 저속 2행정 디젤엔진;