Prime Ship "CRANK-C"(Introduction of New Program)

概要

論文の詳細を見る
Difficulties in applying existing calculation methods to estimating the vibration and strength of crank shaftings of recent 2-stroke cycle marine diesel engines has highlighted the need for the development of a more suitable type of method. Theoretical analysis along with full scale measurements have been carried out by the Research Institute of Nippon Kaiji Kyokai (ClassNK). These efforts have resulted in the completion of a new analysis system to address this issue. The system is composed mainly of a natural vibration analysis routine, a forced vibration analysis routine, and a crank pin fillet stress (strain) calculation routine, which take into consideration crank shaftings both with and without axial vibration damping. Evaluation of crank throw stiffness based on Finite Element Method (FEM) analysis, a new method of determining crank excitation forces, and a calculation of crank pin fillet stress (strain) using a new "response factor" concept determined by FEM zooming calculations are newly defined. Torsional, axial, and coupled torsional-axial vibrations of a shafting system can be analyzed to obtain pin fillet stress (strain) wave forms including added components induced by these shaft vibrations. Calculation results show good agreement with actual measured ones.
一般財団法人日本海事協会の論文