CLC number: U213.212
On-line Access: 2018-06-04
Received: 2017-04-12
Revision Accepted: 2017-12-13
Crosschecked: 2018-04-13
Cited: 0
Clicked: 7057
Citations: Bibtex RefMan EndNote GB/T7714
Xi Sheng, Cai-you Zhao, Qiang Yi, Ping Wang, Meng-ting Xing. Engineered metabarrier as shield from longitudinal waves: band gap properties and optimization mechanisms[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A1700192 @article{title="Engineered metabarrier as shield from longitudinal waves: band gap properties and optimization mechanisms", %0 Journal Article TY - JOUR
超屏障在工程结构纵波抑制中的应用:带隙特性及优化机理创新点:1. 探究超屏障导波模态,获取其带隙频率范围,建立带隙边界频率的简化模型;2. 建立三维半轨道模型,分析新型浮置板轨道结构的整体减振效果;3. 提出一种基于现场测试结果的超屏障带隙频率范围优化机理. 方法:1. 采用有限元法,筛选沿轴向传播的纵波模态,推导带隙边界频率计算公式;2. 通过计算传递谱,研究超屏障结构的纵波抑制效果;3. 建立三维半轨道模型,计算力传递率,并研究采用超屏障的浮置板轨道结构的整体减振效果;4. 基于带隙边界频率计算公式,采用多目标遗传算法,得到超屏障关键参数的Pareto最优解集,并依据现场测试结果选取关键参数最优解. 结论:1. 所保留的现有浮置板轨道隔振效果、超屏障的纵波抑制效果以及带隙频率范围的可控性均有助于提高新型浮置板轨道的整体减振效果.2. 超屏障可提供与现有浮置板轨道隔振器相近的静垂向刚度,且该静垂向刚度与第一带隙频率范围是相互独立的.3. 简化模型及边界频率计算公式可用于获取具有更低起始频率且更宽频率范围的带隙;结合多目标遗传算法及现场测试结果,选取了第一带隙为50~113 Hz的最优解. 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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