Impact-induced vibration in vehicular driveline systems: Theoretical and experimental investigations

Gnanakumarr, M.; Theodossiades, Stephanos; Rahnejat, Homer; Menday, M.T.

doi:10.1243/146441905x10023

Cited by 21 publications

(20 citation statements)

References 14 publications

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“…Analytic radiated noise and its frequency characteristics. The presence of lash zones in the drivetrain (clutch, description of how these loads have been calculated is presented in reference [10]. The rig is designed in transmission and differential gears, spline joints, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…Clonk is a shortone of single solid-mass construction and another of dual-mass form. Full description of the basic rig duration (a few milliseconds), audible, high-frequency, elastoacoustic phenomenon that occurs as a result configuration is provided elsewhere [10,11]. The essential modification to the clutch-transmission of load reversal in the presence of lashes in the driveline (1500-5000 Hz) [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Full description of the basic rig duration (a few milliseconds), audible, high-frequency, elastoacoustic phenomenon that occurs as a result configuration is provided elsewhere [10,11]. The essential modification to the clutch-transmission of load reversal in the presence of lashes in the driveline (1500-5000 Hz) [10][11][12]. It is an onomatopoeic assembly (as described in references [10] and [11]) is the replacement of the conventional solid-mass term, given the metallic nature of the radiated noise.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a Dual-Mass Flywheel on the Impact-Induced Noise in Vehicular Powertrain Systems

Theodossiades

Gnanakumarr

Rahnejat

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part D:

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DOI: 10.1243/09544070JAUTO55Abstract: The appearance and persistence of impact-induced clonk noise in rear wheel drive light truck drivelines has led to an urgent need for remedial action. The pressure for delivering results within tight schedules and financial constraints has resulted in palliative actions rather than fundamental investigations. It has been speculated that the use of a dual-mass flywheel (DMF) can lead to attenuation of clonk metallic noise, even though its main purpose has been to counter transmission rattle by reducing the input torsional impulse. The present work investigates the effect of DMF on impact-induced clonk noise and its severity through experimentation. Sound measurements in the driveline only reveal a slight reduction in the overall levels of impact-induced noise, but a significant change in its quality -the sharpness associated with the typical metallic content of clonk is absent. The effect is also highlighted by the main frequency content of the response when DMF is employed. The duration of the clonk phenomenon is altered from the case where a traditional single solid-mass flywheel is employed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of a Dual-Mass Flywheel on the Impact-Induced Noise in Vehicular Powertrain Systems

Theodossiades

Gnanakumarr

Rahnejat

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…These appropriate mode shapes within the frequency range of interest are selected using component mode synthesis [28]. Detailed explanation of the process is provided in references [29] and [30]. Fig.…”

Section: Inertial Dynamicsmentioning

confidence: 99%

A multi-physics multi-scale approach in engine design analysis

Perera

Theodossiades

Rahnejat

2007

Proceedings of the Institution of Mechanical Engineers, Part K:

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• This is an article from the journal, Proceedings of the Institution of Me- Abstract: Vibration behaviour of an internal combustion engine depends on rigid body inertial dynamics, structural modal characteristics of its elastic members, tribological behaviour of loadbearing contacts, and piston-cylinder interactions. Therefore, it is essential to use a multi-physics approach that addresses all these physical properties in a single integrative model as presented in this paper. This approach can be regarded as holistic and a good aid for detailed design. Particular attention is paid to the critical elements in the system, such as load-bearing conjunctions (crankshaft main bearings) and piston-cylinder wall interactions. Another important feature is the integrated analysis across the physics of motion from microscale fluid film formation to submillimetre structural deformations and onto large displacements of inertial members. In order to succeed in predictions within sensible industrial time scales, analytical methods have been used as far as possible rather than numerical approaches. Model predictions show good agreement with fired engine test data.

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“…On account of the increasing demand for high NVH performance, the research in the field of parameter matching on the transmission system becomes very important. As one of the major parameters in a shaftfinal drive system, the bearing stiffness significantly affects the performance of a high-speed pinion shaft and leads to the coupled vibration of the rear axle assembly [1,2].…”

Section: Introductionmentioning

confidence: 99%

Influence of Bearing Stiffness on the Nonlinear Dynamics of a Shaft-Final Drive System

Wan

Luo

2016

Shock and Vibration

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The bearing stiffness has a considerable influence on the nonlinear coupling vibration characteristics of the shaft-final drive system. A 14-DOF nonlinear coupled vibration model was established by employing the lumped mass method so as to identify the coupling effects of the bearing stiffness to the vibration response of the shaft-final drive system. The engine's torque ripple, the alternating load from the universal joint (U-joint), and the time-varying mesh parameters of hypoid gear of the shaft-final drive system were also considered for accurate quantitative analysis. The numerical analysis of the vibration response of the coupled system was performed and the experimental measurements were carried out for the validation test. Results show that, at the given driving speed, improving the bearing stiffness can reduce the vibration response of the given coupled system; however, when the bearing stiffness increases to a critical value, the effects of bearing stiffness on the vibration reduction become insignificant; when the driving speed changes, the resonance regions of the coupled system vary with the bearing stiffness. The results are helpful to determine the proper bearing stiffness and the optimum control strategy for the shaft-final drive system. It is hoped that the optimal shaft-final drive system can provide good vibration characteristics to achieve the energy saving and noise reduction for the vehicle application.

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Impact-induced vibration in vehicular driveline systems: Theoretical and experimental investigations

Cited by 21 publications

References 14 publications

Effect of a Dual-Mass Flywheel on the Impact-Induced Noise in Vehicular Powertrain Systems

Effect of a Dual-Mass Flywheel on the Impact-Induced Noise in Vehicular Powertrain Systems

A multi-physics multi-scale approach in engine design analysis

Influence of Bearing Stiffness on the Nonlinear Dynamics of a Shaft-Final Drive System

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