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Torsional vibration involves the whole shaft system of the propulsion plant, embracing engine crankshaft, intermediate shafts and propeller shaft, as well as engine running gear, flywheel, propeller and (where appropriate) reduction gearing, flexible couplings, clutches and PTO drives.
Torsional vibration is the angular vibration of an object - commonly a shaft - along its axis of rotation. Torsional vibration is often a concern in power transmission systems using rotating shafts or couplings, where it can cause failures if not controlled.
Torsional vibration refers to the oscillations that occur in a twisting motion, often studied in the context of controlling techniques to mitigate these vibrations in various systems. AI generated definition based on: Journal of Petroleum Science and Engineering, 2013
In the torsional vibration of rotating systems, it is generally the case that the excitation occurs at the same frequency as the rotational speed or at a multiple n of this frequency. For example, a shaft that drives a propeller can be subjected to torsional vibrations whose frequency is given by the number of blades of the propeller times the ...
Torsional vibration is oscillatory twisting of the shafts in a rotor assembly that is superimposed to the running speed. The frequency can be externally forced, or can be an eigenvalue (natural frequency of the torsional system). A resonance will occur if a forcing frequency coincides with a natural frequency.
Torsional vibrations are angular vibrations of an object, typically a shaft along its axis of rotation. Torsional vibrations are evaluated as the variation of rotational speed within a rotation cycle. RPM variations are typically induced by a rough driving torque or a varying load.
23 Φεβ 2023 · This chapter describes the basic theory of vibration. It starts with undamped single-degree-of-freedom (SDOF) systems in translation and torsion and equations of motion are derived. Various damping models used for dissipation of energy are described. Forced vibration...
