Control of sound and vibration for cylindrical shells by utilizing a periodic structure of functionally graded material |
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| Authors: | Huijie Shen Jihong Wen Michael P Païdoussis Dianlong Yu Meisam Asgari Xisen Wen |
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| Institution: | 1. Key Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073, China;2. Department of Mechanical Engineering, McGill University, Montreal, Québec, H3A OC3, Canada |
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| Abstract: | A periodic shell made of functionally graded material (FGM) is proposed in this Letter. Wave propagation and vibration transmission in the FGM periodic shell for different circumferential modes are investigated. By illustrating the dynamical behavior of the periodic FGM shell within the pass/stop band frequency ranges, the mechanism of wave propagation and vibration transmission in the shell are illuminated. Moreover, the suppression characteristics of structure-borne sound in the internal field of the shell, either within the stop or pass band frequency ranges, are studied. |
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| Keywords: | Functionally graded material Periodic shell Band gap Formation mechanism Acoustic pressure |
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