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Weight reduction design of floating raft vibration isolation structure by using nonlinear energy sink cell
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Hong-li WANG1, 2, Xue-wen YIN1, Hu DING2
Journal of Vibration Engineering | 2024, 37(10) : 1739 - 1746
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Journal of Vibration Engineering | 2024, 37(10): 1739-1746
Weight reduction design of floating raft vibration isolation structure by using nonlinear energy sink cell
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Hong-li WANG1, 2, Xue-wen YIN1, Hu DING2
Affiliations
  • 1China Ship Scientific Research Center, Wuxi 214082, China
  • 2School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
Published: 2024-10-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.10.012
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Floating raft vibration isolation systems in the ships or submarines have the requirement of low weight and small volume. To reduce the weight of floating raft vibration isolation systems and improve its vibration suppression effect，nonlinear energy sink cell （NES cell） is applied to the structural optimization of the floating raft vibration isolation system. NES cells are placed on all the substructures of the floating raft system. The mechanical model of the floating raft system with four degrees of freedom and the vibration damping system with NES cell are established. The modal analysis of the floating raft system is carried out. The approximate analytical expression of steady-state response for nonlinear system is derived by Harmonic balance method （HBM） and verified by Runge-Kutta （RK）. The vibration suppression effect under the different total weight and NES cell number is compared by force transitivity response，and the influence of the NES cell number and total weight of the system for the 1st-order mode is analyzed. The results show that NES cell can effectively improve the vibration suppression efficiency of the floating raft system for all the modes while reducing the total weight of the system and realize the structural optimization of the floating raft system effectively.

floating raft vibration isolation system  /  nonlinear energy sink cell  /  structure optimization  /  force transmissibility
Hong-li WANG, Xue-wen YIN, Hu DING. Weight reduction design of floating raft vibration isolation structure by using nonlinear energy sink cell[J]. Journal of Vibration Engineering, 2024 , 37 (10) : 1739 -1746 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.10.012
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2024.10.012
  • Receive Date：2023-12-29
  • Online Date：2026-02-12
  • Published：2024-10-28
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  • Received：2023-12-29
  • Revised：2024-02-28
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    1China Ship Scientific Research Center, Wuxi 214082, China
    2School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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