JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
Dynamic Damper with Damping for Torsional Vibration
Masao SugimotoHideo OhashiToshihiro Takenaka
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1983 Volume 18 Issue 12 Pages 993-998

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Abstract

In recent years, two-stroke slow speed diesel engines with long stroke, large bore and a small number of cylinders are on the increase, to get higher propulsion efficiency of the engine and the propeller and less maintenance of the engine.
Diesel engines with a small number of cylinders, however, have some kinds of vibration problem. Torsional vibration problem is one of them. In case of five-cylinder engines, for instance, 1-node 5th-order torsional vibration is often dangerous for normal shafting design, so some countermeasure is necessary. In such cases, ‘the tuning disk with hydrodynamic damping’ is useful.
Of course, to get the optimum tuning for each different shafting, computer aided design (C.A.D.) is very useful.
Using Geislinger damper, optimum tuning can be obtained by choice of suitable elasticity and damping.

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