舶用ディ-ゼル機関クランク軸系縦振動に関する研究-1-クランク軸の縦ばね定数とクランク半径方向力の軸方向力への変換率 (振動・騒音特集号)

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概要

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• Recently, the axial stiffness of marine diesel engine crankshaft has decreased due to super long stroke application, and the mass of crankshaft has increased due to high supercharging. These have frequently resulted in the appearance of axial vibration for propulsion shafting in maneuvering range.<BR>It is evident that axial stiffness and mass of crankshaft, thrust block stiffness, propeller's entrained water, and exciting and damping forces are primary factors which affect axial vibration of propulsion shafting.<BR>In this paper, the theoretical formulae for calculating axial stiffness and transfer factor of axial to radial force for crankshaft were derived. The former was checked by comparing results of measured values of three actual crankshafts. The obtained results were also compared to those of 5 formulae previously derived by others. In addition, the axial damping force was also analyzed.<BR>Based on calculation results, the natural frequencies and resonance amplitudes of axial vibration for propulsion shafting on two ships were calculated and compared with measured values.

• 公益社団法人 日本マリンエンジニアリング学会の論文

著者

• 全 孝重

  韓国海洋大学

• 金 義〓

  東京大学大学院

関連論文

• 舶用往復内燃機関軸系縦ねじり連成自然振動の理論的解析
• 舶用ディ-ゼル機関クランク軸系縦振動に関する研究-1-クランク軸の縦ばね定数とクランク半径方向力の軸方向力への変換率 (振動・騒音特集号)

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