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Title: Optimization of geometrical parameters for periodical structures applied to floating raft systems by genetic algorithms
Authors: Wang, Z 
Mak, CM 
Keywords: Floating raft
Genetic algorithms
Geometric optimization
Periodic structure
Vibration isolation
Issue Date: 2018
Publisher: Pergamon Press
Source: Applied acoustics, 2018, v. 129, p. 108-115 How to cite?
Journal: Applied acoustics 
Abstract: This paper presented a theoretical study of the vibration control of a floating raft system using periodic structures. The band gap properties of the periodic structures, the power flow and the power transmissibility of the floating raft system were investigated by using the transfer matrix method. To minimize the power flow through periodic structures in a floating raft system, the geometrical parameters of the periodic structures were optimized by using a genetic algorithm. The numerical results demonstrated that the optimum periodic structure can provide broader stop band regions. The stop band regions of the optimum periodic structure contained all the harmonic frequencies of the force excitation in the floating raft system. The numerical results validated that the proposed optimization approach is sufficiently capable for the design of periodic structures. The proposed optimization approach has potential use for the development of vibration and shock isolation systems such as floating raft systems.
ISSN: 0003-682X
EISSN: 1872-910X
DOI: 10.1016/j.apacoust.2017.07.018
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