摘要
为满足航空航天、船舶海洋、土木建筑等领域对轻质多功能结构的迫切需求,本文设计了一种兼具轻量化、高承载和具有优异隔声性能的新型声学超结构。基于声子晶体及声学超材料的设计思想,提出了一种新型类手性拉胀型声学超结构,采用局域共振理论,建立了多层复合谐振局域共振型声子晶体的数值模型,通过与已有结果对比,验证了模型的准确性。基于此,研究了结构在变结构参数条件下的传声损失特性,以及杨氏模量、泊松比等材料参数对结构隔声性能的影响。研究发现:采用多重复合谐振型局域共振声子晶体与橡胶框架进行错层排列,并设置弧度边界,可以同时保障声学和力学性能,并进一步分析了材料、布局对隔声效果的影响。研究结果可为新型轻质隔声结构的设计提供理论参考。
To meet the urgent needs of lightweight multifunctional structures in aerospace,marine,and civil construction fields,a new acoustic superstructure with light weight,high load capacity,and excellent sound insulation performance is designed in this study.Based on the design ideas of phononic crystals and acoustic metamaterials,this paper proposes a new chiral dilating-type acoustic superstructure and establishes a numerical model of multilayer composite locally resonant phononic crystals(LRPCs)by using the local resonance theory.The accuracy of the model is verified by comparing it with the results of previous literature studies.Based on this,the sound transmission loss characteristics of the structure under variable structural parameters and the effects of material parameters,such as Young′s modulus and Poisson′s ratio,on the sound insulation performance of the structure are studied.It is found that the acoustic and mechanical properties can be guaranteed simultaneously by using the multilayer composite LRPCs,rubber frame staggered arrangement,and setting the radian boundary.The effects of material and layout on sound insulation performance is further analyzed.The research results can provide the theoretical reference for designing novel lightweight sound insulation structures.
作者
李鸿泽
刘琪
杨金水
佟丽莉
LI Hongze;LIU Qi;YANG Jinshui;TONG Lili(School of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China;Qingdao Innovation and Development Base,Harbin Engineering University,Qingdao 266000,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2022年第9期1283-1292,共10页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(12172098)
黑龙江省自然科学基金优秀青年项目(YQ2020A001)。
关键词
局域共振
声子晶体
拉胀结构
隔声特性
有限元法
结构优化
local resonance
phononic crystal
dilating-type structure
sound insulation characteristics
finite element method
structure optimization
作者简介
李鸿泽,男,硕士研究生;通信作者:杨金水,男,副教授,博士生导师.E-mail:yangjinshui@hrbeu.edu.cn.
