著者

穂森 繁弘 鎌田 実 佐々木 康夫

出版者

公益社団法人日本船舶海洋工学会

雑誌

西部造船会会報 (ISSN:0389911X)

巻号頁・発行日

no.82, pp.199-208, 1991-09-04

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It has been becoming general that an axial vibration damper is installed on the crankshaft of long-stroke diesel engines in order to minimize the axial excitation forces transferred to the hull through the thrust bearing. But the report that the axial excitation force increased at MCR in spite of the establishment of the damper has been occasionally presented, and besides the fact that peak to peak value (P-P) of the stress fluctuation at crank pin fillet increased in some cases as compared with P-P of the case without the damper has been confirmed as a result of full scale measurement. Therefore, the authors developed the new evaluation system for the vibration and the crank pin fillet stress of the crank shaftings with the axial vibration damper, and introduce the details in this report. In this system, the natural vibration and forced vibration are evaluated by means of a complex eigen value solution. The calculated results of the axial vibration response and crank pin fillet stresses have been compared with the measured ones, and the both show a fairly good agreement respectively.