Abstract
Due to increasing ship dimensions and installed propulsive powers resonance frequencies of the propeller-shaft system tend to decrease. Regarding transverse vibrations one has nowadays to be aware of the fact that resonance frequencies can fall within the operating range of the shaft RPM.
Therefore a calculation method was designed to have a fairly accurate estimate of the resonance frequencies in the design stage. The method being presented in the underlying report was applied to the shafting of the 3rd generation containerships owned by the Netherlands Shipping Union.
The results of the calculation and those of the measurements on the non-rotating shaft show an acceptable agreement.
Recommendations are given for future work on some aspects for which more quantitative data are needed.
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