摘要
本文主要利用周期性结构可以阻挡一定频率范围波的传播特性,将周期性结构引入到基础工程中。通过对周期性结构的结构构型、材料参数、几何尺寸等进行合理设计,提出了一种具有短柱构型的周期基础结构,旨在阻隔振动波的传播。通过对本文所提周期基础结构能带图的计算,提取并确定了最优形式的具有短柱构型的周期基础结构的带隙范围。从时域响应、频域响应的角度分析了周期基础结构的衰减特性。频域响应分析发现,具有短柱构型的周期基础结构的结构层数越多,对带隙频率范围内波的衰减效果越好。时域响应分析可以看出,本文提出的具有短柱构型的周期基础结构对带隙范围内的单频简谐波和多频简谐波均具有良好的衰减效果。为结构隔振设计提供了一个新思路。
The periodic structure can block the propagation characteristics of waves in a certain frequency range and introduce them into the basic engineering.Based on the reasonable design of the structural configuration,material parameters and geometric dimensions of the periodic structure,a periodic basic structure with a short column configuration is proposed,which aims to block the propagation of vibration waves.Through the calculation of the periodic infrastructure band diagram proposed in this paper,the band gap range of the optimal form of the periodic base structure with short column configuration is extracted and determined.The attenuation characteristics of the periodic infrastructure are analyzed from the perspectives of time domain response and frequency domain response.Frequency domain response analysis shows that the more layers of the structure of the periodic structure with the short column configuration,the better the attenuation effect of the wave in the band gap frequency range.The time domain response analysis shows that the periodic basic structure with the short column configuration has good attenuation effect on the single-frequency simple harmonics and multi-frequency simple harmonics in the band gap range.It provides a new idea for the vibration isolation design of the structure.
作者
吴巧云
罗智高
李雨熹
吴应雄
丁兰
陈旭勇
WU Qiaoyun;LUO Zhigao;LI Yuxi;WU Yingxiong;DING Lan;CHEN Xuyong(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430073,China;School of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)
出处
《土木工程与管理学报》
2023年第4期9-15,共7页
Journal of Civil Engineering and Management
基金
中国地震局工程力学研究所地震工程与工程振动重点实验室开放基金项目(2019D01)
国家自然科学基金(52078395
51908521)
湖北省青年拔尖人才计划项目(鄂组通[2021]17号)。
关键词
周期性结构
带隙
衰减特性
频率响应分析
时域响应分析
periodic structure
band gap
attenuation characteristics
frequency response analysis
time domain response analysis
