Technical Paper
Analysis of Crankshaft Three-Dimensional Vibrations in a Rotating Coordinate System
1995-05-01
951292
To decrease the noise and vibration of an engine powerplant, the three-dimensional vibration behavior of the crankshaft system must be clarified precisely. However, the description of dynamic behavior in fixed coordinates would be extremely complex, since many time-variable parameters must be introduced in the equation of motion for the rotating crankshaft. In this research, the vibration behavior of a rotating crankshaft system was analyzed by a rotating coordinate system attached to the crankshaft system: (1) by deriving the time-invariable characteristic matrices of multi-degrees of freedom for the crankshaft system, and (2) by calculating the forced vibration behavior of the crankshaft system under operating conditions.