Dynamic vibration absorption-based noise reduction for fixed-frequency motors in clothes dryers
TAN Longlong
XU Liang
LIANG Quan
Abstract：In response to the issue of excessive low-frequency noise in a certain clothes dryer,this study focuses on a dynamic vibration absorption-based noise reduction solution.Noise source separation and localization were performed using a digital artificial head measurement system.Vibration analysis of the fixed-frequency motor via a vibration testing system identified it as the excitation source of the low-frequency noise.A dynamic vibration absorber was designed based on vibration absorption theory.Experimental results demonstrate that after installing the absorber on the motor's cantilever end:motor vibration velocity decreased by 69.14%,100 Hz low-frequency noise reduced by 10.3 dB(A),overall noise level dropped by 2.7 dB(A).The solution significantly improves silent operation performance for end-users and provides a novel reference for noise reduction in the clothes dryer industry.
Keywords：Fixed frequency motorVibrationNoiseDynamic vibration absorptionLow frequency
Publication Date：2025-08-01
Online Publishing Date：2025-10-14(First online date of this platform, not the publication date of the document)
Pages：5( 70-73,78 )