Analysis of High Frequency Gear Whine Noise by Using an Inverse Boundary Element Method

Ando, Kouichi; Kanda, Yasunori; Fujita, Yoshihiko; Hamdi, Mohamed; Defosse, H.; Hald, Jørgen; Mørkholt, Jakob

doi:10.4271/2005-01-2304

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…The elastic degrees of freedom were reduced using the Craig-Bampton method. Finally, the Inverse Boundary Element Method (IBEM) has been employed for the identification of vibration modes contained within axle whine noise spectrum [19][20][21]. This paper presents a combined experimental and numerical investigation of axle whine phenomenon in a light truck.…”

Section: Introductionmentioning

confidence: 99%

Axle whine phenomenon in light trucks: a combined numerical and experimental investigation

Koronias

Theodossiades

Rahnejat

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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Axle whine is a continuous, steady state tonal sound, emitted from the differential unit’s hypoid gears. It is essentially induced by torque variations. This can be as a result of resonant conditions or torque fluctuations caused by engine order vibrations, compounded by gear transmission error. The principal mechanism of gear whine noise generation is, therefore, through transmission of vibration from the gear shafts and bearings to the differential housing, which is radiated as noise. Furthermore, interactions between the differential unit, axles and driveshafts often generate excessive tonal noises, which are the result of coupled bending and torsional resonances of assembled components. These resonances induce a magnification effect upon the noise source itself through exciting the gear shafts and distorting the alignment of the gear sets. Axle whine noise has become an important noise, vibration and harshness (NVH) concern, because of the nature of the noise; further compounded by the human aural system, which is highly sensitive in tonal memory. The result is continuously increasing warranty costs or use of expensive palliatives to mitigate the phenomenon. In this paper, a combined experimental and numerical investigation of axle whine in a rear-wheel-drive light truck is presented. The aim is to reveal some root causes of the drivetrain’s NVH behaviour, which can be related to the amplification/reduction of axle whine vibration and noise. Correlation of the experimental results with the vibration modes of the drivetrain has shown that for vehicle coasting conditions a number of modes are excited, which can interact with the vibrations of the hypoid gear pair. Finally, some light is shed on the role that differential bulk oil temperature plays in the severity of the ensuing vibration.

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Section: Introductionmentioning

confidence: 99%

Axle whine phenomenon in light trucks: a combined numerical and experimental investigation

Koronias

Theodossiades

Rahnejat

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…The HEAD acoustics and LMS Test.Lab, respectively, developed by the Head company of Germany and LMS company of Belgium, can accurately test and analyze the vibration and noise of transmission. They have the functions of order tracking, spectrum analysis and modulation analysis and define the sound quality parameters of noise for the psychoacoustic analysis of noise signals and the characterization of the auditory perception of human ears to different noise levels (Ando et al, 2005;Abe et al, 2003). Yang (2022) established a nonlinear dynamics model of the torsion-coupled gear transmission.…”

Section: Introductionmentioning

confidence: 99%

Noise analysis and optimization of the gear transmission system for two-speed automatic transmission of pure electric vehicles

Zhaoyao,

Shikai,

Huijun

et al. 2023

Mech. Sci.

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Abstract. In this study, the noise of the gear transmission system for two-speed automatic transmission (2EAT) of pure electric vehicles was analyzed and optimized. Firstly, through vehicle noise tests, poor working conditions and noise contribution of each gear pair were determined with the order analysis method. Secondly, a dynamics calculation model and a simulation model of the gear transmission system were established and the poor meshing state of the main reducer gear pair under specific conditions was determined as the main cause of noise. Finally, a genetic algorithm combined the weight method was used for gear modification. After gear modifications, the fluctuation range of transmission error was reduced and the contact condition of the tooth surface was significantly improved.

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Comparative Analysis of Transmission Housings to Evaluate Whining Noise Performance

Kalyan Deepak Kolla,

Ketan Paua,

V. Vikraman

et al. 2024

ARAI J. Mobi. Tech.

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A quite cabin is always a preferred choice of the customer. Powertrain acts as a source for many noise and vibration problems in a passenger car. Transmission plays a major role in modulating the power from engine to the drive train and is exposed to a high vibration and noise environments. Hence design of transmission for low vibration & noise is need of the hour. This paper attempts to perform a comparative study of 6 housings of different design of a two-wheel drive passenger car to evaluate the vibration performance and Noise radiation characteristics by using FEM (Finite Element Method) & BEM (Boundary Element Method) & finite element analysis techniques. The authors also try to put forward a layout comparison study for the housings and conclude what design is best suited for better NVH whine performance in view of vibrations & sound radiation. These indicative results from this paper can be referred by the design & analysis engineers during early product development of the transmission. Keywords: Transmission, Housings, Whining Noise, Bionic Design, NVH Analysis, Durability Analysis, Study of Housings, Housings NVH Analysis

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Analysis of High Frequency Gear Whine Noise by Using an Inverse Boundary Element Method

Cited by 6 publications

References 5 publications

Axle whine phenomenon in light trucks: a combined numerical and experimental investigation

Axle whine phenomenon in light trucks: a combined numerical and experimental investigation

Noise analysis and optimization of the gear transmission system for two-speed automatic transmission of pure electric vehicles

Comparative Analysis of Transmission Housings to Evaluate Whining Noise Performance

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