engleski

A study into resonant phenomena in the catamaran ferry propulsion system

This paper describes the problem of torsional vibration resonance in the propulsion system of a catamaran ferry. The research was inspired by a practical engineering problem. During the ferry service, the ship crew noticed significant vibrational motions in some operating modes. A series of measurements has been conducted to detect the causes of vibration and to determine ship propulsion system shortcomings. In the first part of the paper some typical causes of propulsion system torsional vibrations are indicated, providing a detailed description of the considered problem. Along with the description of the problem, the goal of measurement, plan, methodology and used instrumentation are described in detail. Special attention is paid to the way measurements are performed. Three measurement programs, which have been established and are already presented in literature, are now expanded to investigate the influence of oil level in the governor box on its operating stability. Further on, measurement results are presented and commented on. Finally, conditions causing torsional vibration resonance have been determined.

Torsional vibrations; Resonance; Propulsion system; Catamaran ferry

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