Vibro-acoustic Noise Reduction of a Washing Machine Using Vibration Absorbing Material

Publish Year:

1398

نوع سند:

مقاله کنفرانسی

زبان:

English

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شناسه ملی سند علمی:

ISAV09_056

تاریخ نمایه سازی: 11 دی 1398

Abstract:

This paper proposing a method to decrease the noise level of a washing machine (WM) using vibration absorbing material in low-frequency band. This method is based on identifying an octave band related to the mode shape generating highest sound power level (SWL) and at-tenuating corresponding vibro -acoustic noise. A finite element modal analysis was carried out to find the dominant mode shape. An experimental modal test was also performed to veri-fy the numerical model. An approach using absorbing material along with acoustic pads was suggested to achieve a significant reduction in vibro-acoustic and airborne noise of WM, re-spectively. Optimal locations of the vibration absorbing materials were determined based on the modal analysis results. Acoustic measurements were conducted in a semi-anechoic cham-ber in order to demonstrate the effectiveness of the proposed method.

Authors

Esmaeil Nouri

Researcher, Sound and Vibration Research Center, R&D Department, Entekhab Industrial Group, ۸۳۳۳۱۱۴۴۴۵, Isfahan, Iran

Saeid Shiralian

Researcher, Sound and Vibration Research Center, R&D Department, Entekhab Industrial Group, ۸۳۳۳۱۱۴۴۴۵, Isfahan, Iran

AliLoghmani
Ali Loghmani

Assistant Professor, Department of Mechanical Engineering, Isfahan University of Tech-nology, ۸۴۱۵۶-۸۳۱۱۱, Isfahan, Iran