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Excitation Response Estimation of Polar Class Vessel Propulsion Shafting System
로날드 디 바로(Barro, Ronald D.),이돈출(Lee, Don-Chool) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.12
The prospect in opening the arctic trade transportation route on a year-round basis offers vast opportunity of exploring untapped resources and shortened navigational routes. In addition, the environment's remoteness and lack of technical experiences remains a big challenge for the maritime industry. With this, engine designers and makers are continually investigating, specifically optimizing propulsion shafting system design, to meet the environmental and technical challenges of the region. The International Association of Classification Society, specifically machinery requirements for polar class ships(IACS UR13), embodies the propulsion shafting design requirements for ice class vessels. However, the necessity to upgrade the various features of the unified rules in meeting current polar requirements is acknowledged by IACS and other classification societies. For the polar class propulsion shafting system, it is perceived that the main source of excitation will be the propeller - ice load interaction. The milling - and the impact load, in addition to the load cases interpreted by IACS, contribute greatly to the overall characteristic of the system and due considerations are given during the propulsion design stage. This paper will expound on the excitation load estimation factors affecting the dynamic response of the different propulsion shafting system design. It is anticipated that detailed understanding of these factors will have a significant role during propulsion shafting design in the future.
저속 2행정 디젤엔진과 직결된 축발전기 비틀림 진동 특성
로날드 디 바로(Ronald D. Barro),김홍렬(HongRyul Kim),트릉헝 남(Truong Hoang Nam),이돈출(Donchool Lee) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
Fuel oil consumption cost varies depending on every ship operation and this roughly amounts to 70% of shipping companies’ total revenue. As such, efforts towards improved fuel economy are being pursued. An annual 1% reduction in fuel consumption is perceived to result in saving tens million US dollars on the global fleet operation. One approach is the application of power take-off configurations which are seen to increase fuel oil economy and are suitable for power generation. In this study, the dynamic properties of a shaft generator coupled on a 10S90ME main engine of an 18,600TEU container vessel is presented. The vibratory torque and angular velocity variation was examined through theoretical analysis and actual vibration measurement. The result of the study suggests a review on existing classification rules for generator design and the lowering of vibratory torque and angular velocity variation guideline.
원형 고무 세그먼트를 갖는 탄성커플링의 동특성과 적응성
이돈출(Lee, D.C.),로날드 디. 바로(Barro, Ronald D),김진경(Kim, J.K.),남택근(Nam, T.K.),유정대(Yu, J.D.) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.4
Medium and high speed marine diesel engines with reduction gear have been widely used as prime mover in small car ferries and fishing vessels. The elastic coupling should be installed and complemented the propulsion shafting system to isolate the vibratory torque between engine and reduction gear. In this paper, the dynamic characteristics of elastic coupling with rubber type circular segments is confirmed by theoretical analysis using the FEM and the hydraulic excitation test at shop. Further adaptation was investigated with the torsional vibration test at diesel engine factory shop.