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Complex band structure characterization of elastic waves in amplitude enhanced metamaterial beams
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Wenjie GUO, Xian HONG, Wenjun LUO, Jianwei YAN, Biao NEI
Journal of Vibration Engineering | 2025, 38(3) : 499 - 506
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Journal of Vibration Engineering | 2025, 38(3): 499-506
Complex band structure characterization of elastic waves in amplitude enhanced metamaterial beams
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Wenjie GUO, Xian HONG, Wenjun LUO, Jianwei YAN, Biao NEI
Affiliations
  • State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure，East China Jiaotong University，Nanchang 330013，China
Published: 2025-03-10 doi: 10.16385/j.cnki.issn.1004-4523.2025.03.006
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Ultra-long beam structure has large vibration frequency span. To control the wide frequency vibration of ultra-long beam structures，amplitude-enhanced dynamic vibration absorbers with damping are arranged periodically on the beam. The amplitude magnification device artificially magnifies the amplitude at the controlled point，thereby increasing the operating ability of the absorber. To be able to consider the effect of damping，a complex band structure analysis model is established，and a new complex band structure calculation method is proposed based on the artificial spring model and the energy method. This method is used to analyze the effect of amplification device type，absorber damping and magnification factor on the complex band structure in detail. The effect of the relative position of the connection points of the ungrounded magnification device on its vibration damping performance is studied. The results show that the magnitude amplification device type，absorber damping and magnification factor have great influence on the complex band structure. The suitably relative position can significantly improve the working ability of the ungrounded magnification device.

metamaterial beam  /  dynamic vibration absorber  /  complex band structure  /  amplitude magnification  /  artificial spring
Wenjie GUO, Xian HONG, Wenjun LUO, Jianwei YAN, Biao NEI. Complex band structure characterization of elastic waves in amplitude enhanced metamaterial beams[J]. Journal of Vibration Engineering, 2025 , 38 (3) : 499 -506 . DOI: 10.16385/j.cnki.issn.1004-4523.2025.03.006
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Year 2025 volume 38 Issue 3
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2025.03.006
  • Receive Date：2023-05-01
  • Online Date：2026-02-11
  • Published：2025-03-10
Article Data
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  • Received：2023-05-01
  • Revised：2023-08-17
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    State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure，East China Jiaotong University，Nanchang 330013，China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
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Number of
species		 占总种数比例
Percentage of
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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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