Book ChapterDOI
Research on Whine Noise of Automotive Radiator Fan During Decelerating
Wei Li,Xiaoping Gong,Haifeng Xu +2 more
- pp 663-675
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TLDR
In this article, an experimental method and a theoretical analysis for the solution of automotive radiator cooling fan whine noise is presented, and the optimization direction for resolving fan whine problems is provided.Abstract:
This research introduces an experimental method and a theoretical analysis for the solution of automotive radiator cooling fan whine noise, and provides the optimization direction for resolving fan whine problems. The analysis of the whine root cause is put forward and validated by the modal tests with non-contact laser scanning vibrometry, in which the white noise signal is used to the fan motor as the excitation source. The results of the analysis and tests show the whine noise is mainly caused by the multiple resonances coincidentally between the excitations of the fan motor’s electromagnetic force and the vibration modes of the fan assembly simultaneously. So that to eliminate or reduce the harmonic excitation (magnetic field) from the rotor grooves will reduce the fan whine noise level significantly.read more
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Journal ArticleDOI
Reduction of vibration forces transmitted from a radiator cooling fan to a vehicle body
TL;DR: In this paper, the authors present methods for reducing transmitted vibration forces caused by mass unbalance of the radiator cooling fan during vehicle idling by using a dynamic simulation model to calculate the equivalent stiffness and damping of the shroud stators and rubber mountings.
References
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Proceedings ArticleDOI
Study on the Fan Noise Reduction for Automotive Radiator Cooling Fans
Atsushi Suzuki,Asuka Soya +1 more
TL;DR: In this article, the authors have successfully developed and applied a BPF noise prediction technique, which consists of a computational fluid dynamics (CFD) and sound wave propagation analyses prior to trial.