Szukana fraza: [Abstract = "The numerical calculations results of torsional vibration of the multi\-cylinder crankshaft in the serial combustion engine \(MC\), including a viscous damper \(VD\), at complex forcing, were shown. In fact, in the MC case the crankshaft rotation forcings spectrum is the sum of harmonic forcing whose amplitude can be compared with the amplitude of the 1st harmonic. A significant impact, in the engine operational velocity, on the vibration damping process of MC, may be the amplitude of the 2nd harmonic of a forcing moment."]

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