Investigation on the Acoustic Absorption of Flexible Micro-Perforated Panel with Ultra-Micro Perforations

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Li, Guoxin^1,2 ; Tang, Xiaoning^3 ; Zhang, Xiaoxiao^4 ; Qian, Y.J.^5 ; Kong, Deyi^1,2

State Key Laboratory of Transducer Technology, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei

230031, China^1

Hefei Institutes of Physical Science, University of Science and Technology of China, Hefei

230026, China^2

Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai

201620, China^3

XQuant Company Ltd, Hangzhou

310012, China^4

IOT Engineering College, Hohai University, Changzhou

213022, China^5

关键词: Acoustic absorption;    Air-gaps;    Computer numerical control millings (CNC);    Matrix materials;    Micro-perforated panels;    Micro-perforations;    Polyethylene terephthalates (PET);    Structural parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012023/pdf
DOI  :  10.1088/1757-899X/269/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Flexible micro-perforated panel has unique advantages in noise reduction due to its good flexibility compared with traditional rigid micro-perforated panel. In this paper, flexible micro-perforated panel was prepared by computer numerical control (CNC) milling machine. Three kinds of plastics including polyvinylchloride (PVC), polyethylene terephthalate (PET), and polyimide (PI) were taken as the matrix materials to prepare flexible micro-perforated panel. It has been found that flexible micro-perforated panel made of PET possessing good porosity and proper density, elastic modulus and poisson ratio exhibited the best acoustic absorption properties. The effects of various structural parameters including perforation diameter, perforation ratio, thickness and air gap have also been investigated, which would be helpful to the optimization of acoustic absorption properties.