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| Band-gap model improvement of tunable locally resonant beams |
| CHEN Sheng-bing 1, WANG Gang 2 |
1.China Aerodynamics Research and Development Center, Mianyang 621000；
2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082 |
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Abstract Locally resonant crystals possess elastic wave band-gaps, which can be used for vibration and noise control of structures. By introducing piezoelectric shunting arrays in host structures, band gaps can also be generated. Particularly, locally resonant gaps can be induced by resonant shunting circuits. Moreover, the properties of locally resonant gaps are conveniently tuned by modifying the circuit parameters. The modeling method of beams with piezoelectric shunting arrays is investigated in this paper, where deficiency of conventional model is pointed out and an improved model is proposed. By transfer matrix method, propagation constants of conventional and improved models are predicted and compared. The results demonstrate that conventional model presents great errors. Hence, improved model effectively boosts accuracy of locally resonant gap prediction.
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Received: 28 December 2015
Published: 15 July 2017
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