engleski

Vibration measurement procedures for monitoring propeller modifications impact on ship propulsion characteristics

Ship energy efficiency measures became dominant in maritime industry in effort to drastically reduce exhaust gas emissions and fuel oil consumption. Project “Improving the ship propulsion efficiency by propeller optimization” aims to research possible fuel savings, vibration and exhaust gas emissions reduction as well as other positive impacts on the ship’s propulsion system by optimizing her propeller(s). The research activities are carried out in several steps and on different types of ships. The first step is to measure the ship’s parameters in the current state at different engine loads before the drydock. Next step is to remove the propeller and perform 3D scan and numerical analysis. Optimisation of the propeller shape, in order to modify it to the desired class, is then performed. After the propeller shape modification to the desired class and the on-site installation, measurement of the ship’s parameters with the optimized propeller is then performed. Final step is to analyse the measured parameters after the propeller modification process and to perform adequate comparison with the measurements taken before any modification in order to evaluate afore mentioned optimization procedures. The presented results of this ongoing project will show how different propeller design, manufacturing processes and damage during operation influence the ship vibrations, fuel oil consumption and consequently the ship’s speed

propulsion efficiency, propeller modification, vibration analysis, fuel oil consumption

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