Tehnički vjesnik, Vol. 27 No. 1, 2020.
Izvorni znanstveni članak
https://doi.org/10.17559/TV20190620055930
Experiment-simulation Study on Noise Reduction of Cylinder Shell with Horn Helmholtz Resonator
Wenjie Yan
; Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, Wuhan University of Technology, Wuhan, Hubei 430070, China
Shilin Yan*
; Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, Wuhan University of Technology, 122 Luoshi Road,Wuhan, Hubei 430070, China
Bin Li
; School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China
Yongjing Li
; Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, Wuhan University of Technology, Wuhan, Hubei 430070, China
Sažetak
This paper focuses on the noise reduction of the cylindrical structure at low frequency (130 Hz-180 Hz). The low-frequency noise response spectrum in the cylindrical cavity is obtained by using the Helmholtz resonator (HR) to reduce the noise peak amplitude. The acoustic simulation software Virtual.Lab is used to establish the finite element model of the cylindrical shell with HR, and to obtain the low-frequency acoustic response in the cylindrical cavity. The simulation model is validated by the experimental results. Then, the influence of installation position, the number of installed resonators and the resonators with different resonance frequencies in the cylindrical cavity are discussed. The results indicate that both the noise reduction band and peak amplitude are increased by installing the HR's on the cylinder shell. The noise reduction of the cylinder shell with HR installed on the upper position is larger than other situations. As the number of resonators increased, the frequency range of the noise reduction in the cylindrical cavity gradually increases, and the noise reduction of the cylinder cavity increases first and then decreases.
Ključne riječi
cylindrical shell; Helmholtz resonator; low-frequency noise; noise reduction
Hrčak ID:
234170
URI
Datum izdavanja:
15.2.2020.
Posjeta: 1.353 *