Forced Torsional Vibration of a Two-Degree-of-Freedom System Including a Clearance and a Two-Step-Hardening Spring.

Kataoka, Masumi; Ohno, Shinichi; Sugimoto, Takanao

doi:10.1299/jsmec1988.34.345

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…In the past decade models of the driveline have been used to predict the dynamic characteristic of a system. Kataoka et al. (1991) described an engine–clutch–gearbox set with two degrees of freedom applying a nonlinear model using an analytical solution.…”

Section: Introductionmentioning

confidence: 99%

Modeling of nonlinear torsional vibration of the automotive powertrain

Idehara

Flach²,

Lemes³

2016

Journal of Vibration and Control

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A vibration model of the powertrain can be used to predict its dynamic behavior when excited by fluctuations in the engine torque and speed. The torsional vibration resulting from torque and speed fluctuations increases the rattle noise in the gearbox and it should be controlled or minimized in order to gain acceptance by clients and manufactures. The fact that the proprieties of the torsional damper integrated into the clutch disc alter the dynamic characteristic of the system is important in the automotive industry for design purposes. In this study, bench test results for the characteristics of a torsional damper for a clutch system (torsional stiffness and friction moment) and powertrain torsional vibration measurements taken in a passenger car were used to verify and calibrate the model. The adjusted model estimates the driveline natural frequency and the time response vibration. The analysis uses order tracking signal processing to isolate the response from the engine excitation (second-order). It is shown that a decrease in the stiffness of the clutch disc torsional damper lowers the natural frequency and an increase in the friction moment reduces the peak amplitude of the gearbox torsional vibration. The formulation and model adjustment showed that a nonlinear model with three degrees of freedom can represent satisfactorily the powertrain dynamics of a front-wheel drive passenger car.

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Section: Introductionmentioning

confidence: 99%

Modeling of nonlinear torsional vibration of the automotive powertrain

Idehara

Flach²,

Lemes³

2016

Journal of Vibration and Control

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Zur Minimierung der Losteilgeräusche von Fahrzeuggetrieben

Doğan¹

2001

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Modeling of Automotive Gear Rattle Phenomenon: State of the Art

Padmanabhan¹,

Rook²,

Singh³

1995

SAE Technical Paper Series

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The sources of gear rattle in automotive transmission and other components are clearance non-linearities, which include backlashes, multi-valued springs, hysteresis, etc. Periodic vibro-impacts are generated because of the single sided or double sided impacts. It is obviously desirable to develop an appropriate computer simulation model which can aid in the control of transient noise and vibration signatures. Such models can also be used to design experiments and to interpret measured data. Several approaches have been attempted in the past, but most common is the digital simulation of the governing differential equations describing the non-linear, torsional dynamics of the drivetrain. Some progress has been made in understanding the basic rattle phenomenon and in developing suitable mathematical models. This article intends to be a status report on the mathematical or computer models including pre-and post-processing considerations. Various topics that will be briefly discussed include dimensionality and reduced order models, numerical difficulties encountered by solution algorithms, design analysis and optimization, etc. Two specific case histories are analyzed in this paper. The first deals with a reverse-idler gear pair rattle problem, and the second case examines flywheel-clutch-hub spline subassembly.

show abstract

Forced Torsional Vibration of a Two-Degree-of-Freedom System Including a Clearance and a Two-Step-Hardening Spring.

Cited by 3 publications

References 2 publications

Modeling of nonlinear torsional vibration of the automotive powertrain

Modeling of nonlinear torsional vibration of the automotive powertrain

Zur Minimierung der Losteilgeräusche von Fahrzeuggetrieben

Modeling of Automotive Gear Rattle Phenomenon: State of the Art

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