Torsional Wave Propagation and Vibration Reducing of Phononic Crystal Pipe With Periodic Torsional Support

Author:

Wu Jiang-hai1,Zhu Hong-zhen2,Sun Yu-dong1,Su Ming-zhu1,Yin Zhi-yong1

Affiliation:

1. National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Center , Wuxi 214082, China

2. Department of Physics, Faculty of Science, Wuxi University , Wuxi 214045, China

Abstract

Abstract In this paper, torsional vibration band gap properties of a fluid filled pipe were studied by using the transfer matrix method (TMM). By comparing the results obtained from the fem software, the established torsional dynamic model and the proposed method were verified. The effects of pipe wall's material and parameters of support on the torsional vibration band gap properties were analyzed. Furthermore, the relationship between torsional displacement and vibration band gaps was investigated. These attenuation regions of responses show good agreement with the frequency of Bragg band gaps. Explained the locally resonant (LR) phononic crystals (PCs) band gaps form mechanism from the point of mechanical impedance mismatch theory, the results show that the peak frequency of impedance mismatch defines the beginning of both LRs and Bragg band gaps. In essence, the locally resonant is the same as periodic support from the impedance theory. The results of this paper could give some valuable suggestions on the vibration control of the pipeline system.

Funder

China Scholarship Council

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference27 articles.

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