Parameter Study on a Composite Sound-Absorbing Structure Liner in Elevator Shafts

作     者：Ting Qu Bo Wang Hequn Min 

作者机构：Key Laboratory of Urban and Architectural Heritage Conservation of Ministry of EducationSchool of ArchitectureSoutheast UniversityNanjing210096China 

出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)

年 卷 期：2023年第11卷第9期

页      面：3433-3446页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by Opening Foundation of Key Laboratory of New Technology for Construction of Cities in Mountain Area,Ministry of Education,China(LNTCCMA-20210104) This work was also supported by the Natural Science Foundation of China(Grant No.51408113) the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20140632) 

主　　题：Elevator shafts sound-absorbing liner porous material flow resistivity acoustic impedance 

摘      要：With the growing global environmental awareness,the development of renewable and green materials has gained increased worldwide interest to substitute conventional materials and are favorable for sustainable economic *** paper proposed a novel eco-friendly sound absorbing structure(NSAS)liner for noise reduction in elevator *** base layer integrated with the shaft walls is a damping gypsum mortarboard,and a rock wool board and a perforated cement mortarboard are used to compose the *** on the acoustic impedance theory of porous materials and perforated panels,the sound absorption theory of the NSAS was proposed;the parameter effects of the rock wool board(flow resistivity,porosity,structure factor)and perforated panel(perforated rates,thickness,density,perforated diameter)on NSAS absorption were discussed theoretically for absorption improvement,and experiments were also *** results showed that the perforation rate,the thickness of the perforated plate,and the porosity,flow resistance,and volume density of the rock wool board played a key issue in the absorption performances of the *** verified the accuracy of the proposed theoretical *** sound absorption performance of the NSAS at frequencies between 500–1600 Hz was achieved in both numerical analysis and experiments,and the sound absorption coefficient was improved to 0.72 around 1000 Hz after parameter *** NSAS proposed in this paper can also be made of other renewable materials with preferable structure strength and still has the potential to broaden the absorption *** can provide a reference for controlling the elevator shaft noise.