An Investigation of Three-Dimensional Vibrations of Diesel Engine Shaftings Using the Transfer Matrix Method

• Published in: JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN Vol. 31; no. 9; pp. 670 - 678
• Main Authors: Wakabayashi, Katsuhiko, Iwamoto, Shoichi, Kodama, Tomoaki, Honda, Yasuhiro
• Format: Journal Article
• Language: Japanese
• Published: The Japan Institute of Marine Engineering 1996
• Subjects: Coupled Vibration; Diesel Engine; Forced Vibration; Lateral Vibration; Longitudinal Vibration; Three Dimensional Analysis; Torsional Vibration; Transfer Matrix Method
• ISSN: 0388-3051; 1884-4758
• DOI: 10.5988/jime1966.31.670

In this report the longitudinal, torsional and two directions of lateral vibrations on the shaftings of large, low-speed, seven-cylinders, in-line marine diesel engines and a small, high-speed, ten-cylinders, V-type automobile diesel engine are calculated first by the 3 dimensional analysis of forced vibration using the transfer matrix method, which has been developed by the authors. Next, the calculated results are compared with the corresponding experimental results for investigating the characteristics of the 3 dimensional vibrations and also the adequacy of the analytical method. As a result of the comparisons of the calculated results with the measured results, the following conclusions are obtained; [1] The calculated results are approximately similar to the measured ones. From this comparison, it can be assured that the use of this 3 dimensional calculation methods enables the estimation of the longitudinal, torsional and two directions of lateral vibrations, including the coupled vibrations, provided that the correct input data are specified. [2] The characteristics of the forced vibrations of the large, low-speed, marine diesel engines and the small, high-speed, automobile diesel engine are partially made clear.