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

(1 citation statement)

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

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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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Experimental Transfer Path Analysis of Gear Whine

Kanda¹,

Saka²,

Fujikawa³

et al. 2005

SAE Technical Paper Series

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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

Comparative Analysis of Transmission Housings to Evaluate Whining Noise Performance

Experimental Transfer Path Analysis of Gear Whine

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