Simulating the Torsional Vibration Signal of Two-Stroke Marine Diesel Engine with Normal Firing and Mis-Firing

The article presented the modelling of torsional vibration signal marine diesel engine, MAN B&W 6S46MC-C7, installed in general cargo ships 34000 DWT, built at Pha Rung Shipyard (Vietnam). authors imitated signal, based on established when engine works normal firing and mis-firing state, according to Class Regulation Rules for new building steel hull calculating measuring propulsion shaft-line system. used Matlab software imitate signals real time domain then converted them into frequency order by Fast Fourier Transform (FFT).