Optimal design for torsional vibration suppression of non-smooth NES

Nonlinear energy sinks (NESs) have received increasing attention for their ability to passively inhibit a large amount of vibration energy over a wide range of frequencies. However, although many studies have focused on dynamics of NES, few have addressed the optimal design method of NES, especially...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2022-11, Vol.36 (11), p.5399-5412
Main Authors: Cao, Yanbo, Yao, Hongliang, Dou, Jinxin, Han, Shengdong
Format: Article
Language:English
Subjects:
Computer simulation
Control
Design optimization
Dynamical Systems
Energy dissipation
Engineering
Genetic algorithms
Industrial and Production Engineering
Mechanical Engineering
Military helicopters
Optimization
Original Article
Rotors
Stiffness
Torsional vibration
Vibration
Vibration control
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Summary:Nonlinear energy sinks (NESs) have received increasing attention for their ability to passively inhibit a large amount of vibration energy over a wide range of frequencies. However, although many studies have focused on dynamics of NES, few have addressed the optimal design method of NES, especially for the non-smooth NES (NSNES). Therefore, the parameter optimization method for an NSNES which can be applied to supress torsional vibration of rotor system was developed. First, the design variables were reduced by using piece-wise linear torsional stiffness to equivalently fit cubic torsional stiffness; then, taking the torsional vibration of single-disk rotor system as an example, the genetic algorithm (GA) was used to solve the optimization problem of the NSNES in torsional vibration suppression of rotor system. Finally, the optimized NSNES was verified by numerical simulation and experiment to suppress the torsional vibration of a rotor system. The results show that the optimally designed NSNES can effectively suppress torsional vibration of a rotor system. In transient vibration suppression, the optimal percentage of accumulated energy dissipation of NSNES can reach 95.3 %. For steady-state vibration suppression, the peak vibration suppression of NSNES can reach 82.2 % in the simulation and 81.9 % in the test.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-022-1006-9