Experimental and Numerical analysis of Metallic Bellow for Acoustic Performance

International Conference on Materials, Alloys and Experimental Mechanics 2017

材料科学;金属学;机械制造

Panchwadkar, Amit A.^1 ; Awasare, Pradeep J.^2 ; Ingle, Ravidra B.^3

Research Scholar Sinhgad College of Engineering, Assoc. Prof. PCCoE, SPPU, Pune, India^1

PCCoE, SPPU, Pune, India^2

MKSSS's Cummins COEW, SPPU, Pune, India^3

关键词: Acoustic performance;    Experimental and numerical analysis;    Hard boundary conditions;    Helmholtz resonators;    Incident sound waves;    Measurement techniques;    Metallic bellows;    Noise attenuation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/225/1/012216/pdf
DOI  :  10.1088/1757-899X/225/1/012216

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Noise will concern about the work environment of industry. Machinery environment has overall noise which interrupts communication between the workers. This problem of miscommunication and health hazard will make sense to go for noise attenuation. Modification in machine setup may affect the performance of it. Instead of that, Helmholtz resonator principle will be a better option for noise reduction along the transmission path. Resonator has design variables which gives resonating frequency will help us to confirm the frequency range. This paper deals with metallic bellow which behaves like inertial mass under incident sound wave. Sound wave energy is affected by hard boundary condition of resonator and bellow. Metallic bellow is used in combination with resonator to find out Transmission loss (TL). Microphone attachment with FFT analyzer will give the frequency range for numerical analysis. Numerical analysis of bellow and resonator is carried out to summarize the acoustic behavior of bellow. Bellow can be numerically analyzed to check noise attenuation for centrifugal blower. An impedance tube measurement technique is performed to validate the numerical results for assembly. Dimensional and shape modification can be done to get the acoustic performance of bellow.