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http://dx.doi.org/10.5050/KSNVE.2015.25.5.321

Transient Torsional Vibration Response due to Ice Impact Torque Excitation on Marine Diesel Engine Propulsion Shafting  

Barro, Ronald D. (Training Ship, Mokpo National Maritime University)
Eom, Ki Tak (Outfitting Machinery Design Dep't, Hyundai-Samho Heavy Industries Co., Ltd)
Lee, Don Chool (Mokpo National Maritime University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.25, no.5, 2015 , pp. 321-328 More about this Journal
Abstract
In recent years, there has been an increasing demand to apply the new IACS(International Association of Classification Societies) standards for ice and polar-classed ships. For ice-class vessel propulsion system, the ice impact torque design criterion is defined as a periodic harmonic function in relation to the number of the propeller blades. However, irregular or transient ice impact torque is assumed to occur likely in actual circumstances rather than these periodic loadings. In this paper, the reliability and torsional vibration characteristics of a comparatively large six-cylinder marine diesel engine for propulsion shafting system was examined and reviewed in accordance with current regulations. In this particular, the transient ice impact torque and excessive vibratory torque originating from diesel engine were interpreted and the resonant points identified through theoretical analysis. Several floating ice impacts were carried out to evaluate torque responses using the calculation method of classification rule requirement. The Newmark method was used for the transient response analysis of the whole system.
Keywords
Diesel Engine; Ice Impact Torque; Marine Propulsion Shafting; Transient Torsional Vibration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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