铁道科学与工程学报2024，Vol.21Issue(12)：5221-5231,11.DOI:10.19713/j.cnki.43-1423/u.T20240421
铁路超材料波阻垫设计与低频减振降噪应用研究
Research on the design and application of low-frequency vibration and noise reduction of railroad metamaterial wave-resistant pads
摘要
Abstract
This study addressed the challenges posed by low-frequency vibration and noise in urban rail transit systems,which have adverse effects on line equipment,surrounding structures,and human well-being.In response to these issues,the research focused on the development of a novel metamaterial wave resistor pad utilizing local resonance mechanism technology.The pad,constructed with a periodic arrangement of steel sheet nested rubber structures,aimed to enhance overall structural elastic wave attenuation and improve vibration damping efficiency.The study began by deriving the bandgap calculation formula and discussing the impact of geometric parameters on bandgap generation.Additionally,it employed frequency domain dynamics and boundary element methods to analyze indoor vibration and secondary noise distribution in adjacent buildings.Results demonstrate the effectiveness of the metamaterial wave-resistive pad in controlling vibration and secondary noise within the bandgap frequency range,achieving up to 20 dB vibration attenuation.Notably,within the optimal frequency range of 17～28 Hz,the pad exhibits significant noise reduction,with a maximum average sound pressure level reduction of 25 dB across all floors.Overall,the study underscored the effectiveness of the metamaterial wave-resistant pad in mitigating low-frequency vibration and noise induced by subway trains,offering valuable insights for real-world applications in subway vibration and noise reduction projects.关键词
超材料波阻垫/元胞/带隙/局域共振/减振降噪Key words
metamaterial wave-resistive pads/metacells/bandgaps/localized resonance/vibration and noise reduction分类
交通工程引用本文复制引用
余奇,赵才友,张鑫浩,师多佳,王平..铁路超材料波阻垫设计与低频减振降噪应用研究[J].铁道科学与工程学报,2024,21(12):5221-5231,11.基金项目
高速铁路基础研究联合基金资助项目(U1734207) （U1734207）
国家自然科学基金资助项目(51978585) （51978585）
国家重点研发计划项目(2023YFB2603700,2022YFB2603404) （2023YFB2603700,2022YFB2603404）
