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http://dx.doi.org/10.5916/jkosme.2016.40.3.185

A case study on the optimal shafting alignment concerning bearing stiffness for 10,100 TEU container carrier  

Lee, Jae-Ung (Korean Register)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.40, no.3, 2016 , pp. 185-190 More about this Journal
Abstract
Damages of the main engine aftmost bearing and the after stern tube bearing tend to increase due to misalignment. And as the shafting system becomes stiffer due to the large engine power, whereas the hull structure becomes more flexible due to optimization by using high tensile thin steel plates. And this is the reason that more sophisticated shaft alignments are required. In this study, the optimum shafting alignment calculation was carried out, considering the thermal expansion effect, exploiting the sensitivity index, which indicates the reasonable position of forward intermediate shaft bearing for shaft alignment. and as the main subject in this study, the elastic deformation on intermediate shaft and main engine bearings occurred by vertical load of shaft mass were examined thoroughly and analyzed allowable load of bearings, reaction influence numbers of all bearings. As the result, a reliable optimum shafting alignment was derived theoretically. To verify these results, they were referred to the engine maker's technical information of main engine installation and being used shafting alignment programs of both Korean Register of Shipping and Det Norske Veritas, their reliability were reviewed.
Keywords
Shaft alignment; Sensitivity index; Bearing stiffness; Reaction influence number;
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