Modeling of Gearbox Whining Noise

Perret-Liaudet, Joël; Carbonelli, Alexandre; Rigaud, Emmanuel; Nelain, Brice; Bouvet, Pascal; Vialonga, C. Jacques

doi:10.4271/2014-01-2090

Cited by 12 publications

(4 citation statements)

References 3 publications

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“…θ a and θ p are the torsional angles of the driver gear and passive gear, respectively. The overall circumferential displacement at the meshing point on the driver and passive sides is, respectively, given by y ac e a + θ a R a (2) where e a is the circumferential displacement of the driver gear, and…”

Section: Whine Noise Generation Theory and Dynamic Model Of Gear Systemmentioning

confidence: 99%

“…The simulation results were validated using test data. The finite element analysis (FEA) model was then used to identify the main parameters that influenced the whine noise [2]. Meier et al described the powertrain NVH development process for EV at Daimler and developed a new "whining intensity factor" to evaluate the annoyance caused by tonal noise.…”

Section: Introductionmentioning

confidence: 99%

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Parameter Study and Improvement of Gearbox Whine Noise in Electric Vehicle

Zhang¹

2018

Automot. Innov.

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Gearbox whine noise can seriously reduce the interior sound quality in an electric passenger car. In this work, a six-degree-offreedom (6-DOF) dynamic model of a helical gear system was constructed and the mechanism for generation of whine noise was analyzed. The root cause of the problem was found through noise, vibration and harshness (NVH) testing of the gearbox and the vehicle. A rigid-elastic coupling dynamics model of the reducer assembly was then developed. The accuracy of the model was then validated via modal testing. The structure-borne noise of the reducer under full acceleration conditions was predicted using the acoustic structure coupling model and the rigid-elastic coupling model of the reducer. Gear parameters including the pressure angle, the helix angle and the contact ratio were studied to determine their effects on the whine noise. Gear tooth microgeometry modification parameters were then optimized to reduce the transmission error of the first pair of meshing gears. Finally, the whine noise from the gearbox was eliminated.

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Section: Whine Noise Generation Theory and Dynamic Model Of Gear Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parameter Study and Improvement of Gearbox Whine Noise in Electric Vehicle

Zhang¹

2018

Automot. Innov.

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“…Smith studied about reducing gear transmission error according to contact ratio changes. Park [3] and Perret-Liaudet [4] classified transmission error into static transmission error (STE) and dynamic transmission error (DTE). Many traditional scientists studied method to reduce transmission error in gear system.…”

Section: Introductionmentioning

confidence: 99%

Geometry Modification of Helical Gear for Reduction of Static Transmission Error

et al. 2018

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Abstract. Gear systems are extensively employed in mechanical systems since they allow the transfer of power with a variety of gear ratios. So gears cause the inherent deflections and deformations due to the high pressure which occurs between the meshing teeth when transmit power and results in the transmission error. It is usually assumed that the transmission error and variation of the gear mesh stiffness are the dominant excitation mechanisms. Predicting the static transmission error is a necessary condition to reduce noise radiated from the gear systems. This paper aims to investigate the effect of tooth profile modifications on the transmission error of helical gear. The contact stress analysis was implemented for different roll positions to find out the most critical roll angle in view point of root flank stress. The PPTE (peak-to-peak of transmission error) is estimated at the roll angles by different loading conditions with two dimensional FEM. The optimal profile modification from the root to the tip is proposed.

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“…In order to model this internal source, the elastic forces between gears are usually introduced by a combination of time-periodic stiffnesses and an imposed displacement function, both acting along the lines of action. The steady state dynamic responses of this kind of model with a constant external load are extensively studied [3], with in mind the problem of the whining noise [4].…”

Section: Introductionmentioning

confidence: 99%

Stationary Responses of Gear Systems With Combined Periodically Time-Varying Stiffness and Stochastic External Excitations

Perret-Liaudet

Garambois

Rigaud

2017

MPT

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The stationary dynamic response of a geared system with time-varying mesh stiffness subjected to stationary stochastic external excitation is examined in this paper. To this end, a spur gear pair model with periodical timevarying mesh stiffness is extended to include stochastic external force excitations. These random forces are introduced as second-order stationary and ergodic processes. In order to compute the stationary response, a very efficient method, called the iterative spectral method is used. This method is derived in the frequency domain and provides the explicit power spectral density of the response. The PSD response is expressed as a function of the bispectrum which is the bilinear Fourier transform of the bitemporal impulse response of the parametric system.

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Modeling of Gearbox Whining Noise

Cited by 12 publications

References 3 publications

Parameter Study and Improvement of Gearbox Whine Noise in Electric Vehicle

Parameter Study and Improvement of Gearbox Whine Noise in Electric Vehicle

Geometry Modification of Helical Gear for Reduction of Static Transmission Error

Stationary Responses of Gear Systems With Combined Periodically Time-Varying Stiffness and Stochastic External Excitations

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