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- Title
A study of torsional vibration attenuation in closed-loop crankshaft model using absorbers with cubic and quintic smooth nonlinearities.
- Authors
Ma, Kai; Du, Jingtao; Liu, Yang
- Abstract
Currently, the design of torsional vibration attenuator is mostly based on the open-loop model coupled with a single nonlinear factor. However, in the actual operation status of engine, the torsional vibration of crankshaft is usually affected by multiple nonlinear factors. Motivated by such limitation, a nonlinear closed-loop self-excited coupling oscillation model is constructed in this work. The model considers various nonlinear factors such as combustion pressure, inertia force, piston ring friction, bearing friction, angular velocity feedback and angular displacement feedback. On the basis of model validation, various nonlinear energy sinks (NES) (including cubic smooth nonlinear NES, quintic smooth nonlinear NES and their series–parallel combination NES) are applied to the closed-loop model to suppress the torsional vibration amplitude. An improved Newmark-β integral method is proposed to solve the strong nonlinear model in longer time domain. Meanwhile, particle swarm optimization algorithm is proposed to design NES to avoid falling into local optimal solution. The results show that different NES design forms have different effects on the crankshaft torsional vibration reduction, which has important guiding significance for the engineering application of crankshaft torsional vibration NES absorber.
- Subjects
TORSIONAL vibration; PARTICLE swarm optimization; ANGULAR velocity; PISTON rings; FRICTION; VIBRATION absorbers; MATHEMATICAL optimization
- Publication
Nonlinear Dynamics, 2023, Vol 111, Issue 7, p6017
- ISSN
0924-090X
- Publication type
Article
- DOI
10.1007/s11071-022-08165-0