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Gearbox Noise: Description and Modelling of the Two Main Internal Acoustic Sources

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In this paper, the two main acoustic sources of a gear pair radiating in free space are investigated. First, a model of the fluid-pumping noise source is proposed, which takes into account the effects of the meshing frequency and of some geometrical parameters of the gear. Then, analytical and numerical results regarding the vibroacoustic behaviour of the gear wheels are exposed. It is found that harmonic excitation in the region of tooth contact leads to a non-harmonic vibratory response of the wheels due to their rotation, but that the noise heard in a global coordinate system is harmonic. The influence of the rotation speed on the acoustic properties of the wheels is described.

Document Type: Research Article

Publication date: 1999-11-01

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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