Trees as large-scale natural phononic crystals: Simulation and experimental verification

作     者：Jiankun Huang Yifan Liu Yaguang Li 

作者机构：Key Laboratory of State Forestry Administration on Soil and Water ConservationSchool of Soil and Water ConservationBeijing Forestry UniversityBeijingChina 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2019年第7卷第2期

页      面：196-202页

核心收录：

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant 31700637) Fundamental Research Funds for the Central Universities of China(Grant.2015ZCQ-SB-01 and 2017ZY22) 

主　　题：Urban trees Phononic crystal Dispersion curve Band gap Rayleigh wave 

摘      要：Urban trees are usually planted on a periodic layout in the spatial *** regard urban trees as large-scale natural phononic *** entire forest is reduced to a reasonable tree-soil unit cell based on the phononic crystal theory and finite element method by COMSOL software is used to obtain the dispersion *** Rayleigh wave band gaps of phononic trees are distinguished by the sound cone *** influences of soil elastic modulus and tree height on band gaps are investigated.A three-dimensional simulation model and experiment test are applied to validate the effect of phononic trees on vibration *** numerical frequency reduction zones coincide exactly with the theoretical band *** soil stiffness results in a higher-frequency and wider band *** increasing tree height is beneficial to obtain low-frequency band gaps.A periodically arranged plantation that Rayleigh wave band gaps at frequency ≤60 Hz could be *** study opens up a new theoretical basis for the quantitative analyses of urban trees to the ground vibration mitigation at a certain frequency range.