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Torsional vibration silencers used in vessels propulsion systems

Homik W.

Zeszyty Naukowe / Akademia Morska w Szczecinie

2014

nr 40 (112)

9--16

The main source of vibration in the engine piston is the work of the piston – crank, and swapping reciprocating motion to the rotary motion. In this paper are described among others the crankshaft vibration which result in the occurrence of cyclic forces such as forces pressure of gas and inertia forces. In addition were made the analysis of longitudinal vibration of the crankshaft, which are these vibrations are an important problem in high-power vessels’ engines. Regardless of the dynamic system in which the engine is running the greatest threat for crankshaft are the torsional vibrations. The possibilities of vibration damping of the crankshaft in the engine also were discussed.

The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper

Homik W.

Polish Maritime Research

2012

nr 4

71--77

The article discusses causes of the appearance of transverse, longitudinal and torsional crankshaft vibrations in multi-cylinder internal combustion engines. Particular attention is paid to the torsional vibration which is the most severe threat to engine crankshafts. Damping methods making use of torsion dampers are presented. With the reference to viscotic dampers, problems with their damping efficiency are discussed in the context of viscosity changes of the damping liquid. The article also presents the amplitude-frequency characteristics of a series of viscotic dampers, which were recorded experimentally on the research rig and on a real object. An idea of vibration damper metric is given.

Damping of torsional vibrations of ship engine crankshafts – general selection methods of viscous vibration damper

Chomik W.

Polish Maritime Research

2011

nr 3

43-47

This paper describes causes of torsional vibrations generated in ship engine crankshafts. Means for damping the torsional vibrations as well as general methods for selection of viscous torsional vibration dampers for a given type of engine are also presented. Exemplary results of calculations connected with selection of a viscous torsional vibration damper intended for a six-cylinder engine, are attached.