Dynamic analysis of high speed gears by using loaded static transmission error

Özgüven, H. Nevzat; Houser, Donald R.

doi:10.1016/0022-460x(88)90416-6

Cited by 195 publications

(62 citation statements)

References 15 publications

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“…In practice it is impossible to completely remove eccentricity. In this paper we are interested in modelling the interaction between external drive fluctuations and the static transmission error [4,14], which incorporates profile errors due to tooth deflection [15], eccentricity, and other manufacturing errors such as the surface finish on each tooth, which are known to have a large effect on gear vibrations [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Intermittent gear rattle due to interactions between forcing and manufacturing errors

Ottewill

Neild

Wilson

2009

Journal of Sound and Vibration

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The interaction between eccentricity and an external forcing fluctuation in gear rattle response is investigated experimentally. The experimental rig consists of a 1:1 ratio steel spur gear pair, the input gear being controlled in displacement and the output gear being under no load. Gear transmission errors recorded using high accuracy encoders are presented. Large variations in backlash oscillation amplitude are observed as the relative phase of the input forcing and the sinusoidal static transmission error due to eccentricity is varied. A simplified mathematical model incorporating eccentricity is developed. It is compared with experimental findings for three different gear eccentricity alignments by way of plots relating backlash oscillation amplitude to forcing amplitude and phase relative to eccentricity sinusoid. It is shown that eccentricity does not fully account for the experimentally observed large variations in amplitude. Through analysis of the experimental data, it is suggested that further tooth profiling errors may explain the discrepancies.

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Section: Introductionmentioning

confidence: 99%

Intermittent gear rattle due to interactions between forcing and manufacturing errors

Ottewill

Neild

Wilson

2009

Journal of Sound and Vibration

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“…1-At each pinion angle, an initial guess is made for the central oil film thickness, using equation (2). The data for contact geometry, load and speed of entraining motion required for this purpose are obtained through TCA.…”

Section: Methodsmentioning

confidence: 99%

“…These fluctuations initiate vibrations within the growling-sound frequency range. A number of publications have been reported on the dynamics of parallel axis transmissions, such as that by Ozguven et al [2]. However, a relatively small number of investigations can be found on the dynamics of non-parallel axis gears (such as hypoid and bevel gears) because of the complexity of gear kinematics and meshing characteristics.…”

Section: Introductionmentioning

confidence: 99%

Elastohydrodynamics of Hypoid Gears in Axle Whine Conditions

Mohammadpour

Rahnejat

Theodossiades

2012

SAE Technical Paper Series

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This paper presents an investigation into Elastohydrodynamic (EHL) modeling of differential hypoid gears that can be used in coupling with Newtonian (or multibody) dynamics to study Noise, Vibration and Harshness (NVH) phenomena, such as axle whine. The latter is a noise of a tonal nature, emitted from differential axles, characterised by the gear meshing frequency and its multiples. It appears at a variety of operating conditions; during drive and coasting, high and low torque loading. Key design targets for differential hypoid gears are improved efficiency and reduced vibration, which depend critically on the formation of an EHL lubricant film. The stiffness and damping of the oil film and friction generated in the contact can have important effects and cannot be neglected when examining the NVH behaviour of hypoid gears. The operating conditions in hypoid gears are usually characterized by high load, relatively low speeds, angled flow and elliptical contact footprint of high aspect ratio. Some extrapolated/empirical equations to estimate friction and film thickness have been reported for moderate loads. However, their use in hypoid gears is questionable. Additionally, the majority of reported numerical models for film thickness and friction have not been applied under such operating conditions. In this paper a numerical model of EHL elliptical point contact has been presented to obtain the EHL film behaviour under the usual range of operating conditions of hypoid gears. Realistic engine torque-speed characteristics are used. For these conditions, the load share per teeth pair contact is in the region of 500-6000N. A suitable method of solution is applied to ease the convergence of the numerical method, namely the distributed line low relaxation effective influence Newton-Raphson method. As the result of the angled direction of the entraining flow in the contact of hypoid gear teeth pairs, this method has been found to be suitable, thus adopted. The geometric and kinematic input data for EHL calculations are calculated using Tooth Contact Analysis (TCA).

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“…Substituting the relative displacements of gear meshes given by Equations (3) to (8) into Equations (11) to (17), yields the transverse and translational displacements of gears.…”

Section: Derivation Of Equationsmentioning

confidence: 99%

Dynamic Analysis of Wind Turbine Gearbox Components

Zhao

2016

Energies

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This paper studies the dynamic response of a wind turbine gearbox under different excitation conditions. The proposed 4 degree-of-freedom (DOF) dynamic model takes into account the key factors such as the time-varying mesh stiffness, bearing stiffness, damping, static transmission error and gear backlash. Both the external excitation due to wind and the internal excitation due to the static transmission error are included to represent the gearbox excitation conditions. With the help of the time history and frequency spectrum, the dynamic responses of wind turbine gearbox components are investigated by using the numerical integration method. This paper explains under which conditions the fretting corrosion, as one of the wind turbine gearbox failure modes, may occur. Furthermore, it is observed that the external excitation fluctuation has large influence on the dynamic responses of both the gears and bearings.

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Dynamic analysis of high speed gears by using loaded static transmission error

Cited by 195 publications

References 15 publications

Intermittent gear rattle due to interactions between forcing and manufacturing errors

Intermittent gear rattle due to interactions between forcing and manufacturing errors

Elastohydrodynamics of Hypoid Gears in Axle Whine Conditions

Dynamic Analysis of Wind Turbine Gearbox Components

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