Hydro Bushings - Innovative NVH Solutions in Chassis Technology

Sauer, Wolfgang; Guy, Yoram

doi:10.4271/2003-01-1475

Cited by 18 publications

(34 citation statements)

References 2 publications

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“…X Y 1 is the so-called dynamic stiffness; 1 Φ is the so-called loss angle. In general, the DF can be computed evaluating the expression:…”

Section: Dynamic Characteristicsmentioning

confidence: 99%

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Notice of Retraction: Development of an innovative method for researching the structural and related parameters effect on the dynamic behavior of hydrobushings

Xuebing

2011

2011 IEEE 2nd International Conference on Software Engineering and Service Science

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due to their own inherent physical limitations conventional elastomeric bushings cannot simultaneously satisfy the conflicting requirements of low frequency shake control versus high frequency structure-borne noise isolation. These contradicting requirements have brought about the development of hydrobushings. The operational principle of hydrobushings was introduced simply. Meanwhile, two most important dynamic characteristic parameters were illustrated. The novel and innovative model of hydrobushing was built in multi-disciplinary simulation software AMESim (Advanced Modeling and Simulation Environment for systems Engineering).The mathematical software MATLAB (Matrix Laboratory) was used to process the simulation results of model in software AMESim. The dynamic characteristic tests were performed with MTS 831 servo-controlled hydraulic test rig. And experimental data are conformable to the simulation results. Therefore, it proves that virtual prototype model is correct and believable. Finally, this innovative model was used to research how the structural and related parameters have an effect on the dynamic behavior of hydrobushings.

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“…X Y 1 is the so-called dynamic stiffness; 1 Φ is the so-called loss angle. In general, the DF can be computed evaluating the expression:…”

Section: Dynamic Characteristicsmentioning

confidence: 99%

“…Suspension bushings and mounts influence the noise and vibration transmissibilities crucially as the elastic and damping links between powertrain, chassis and body structure [1] .…”

Section: Introductionmentioning

confidence: 99%

Notice of Retraction: Development of an innovative method for researching the structural and related parameters effect on the dynamic behavior of hydrobushings

Xuebing

2011

2011 IEEE 2nd International Conference on Software Engineering and Service Science

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“…Hydraulic bushings are widely used as compliance joints in automotive suspension because their unique, amplitude and frequency dependent dynamic properties are beneficial for both ride quality and vibration isolation [1][2]. Design features in these devices typically include pumping chambers with working fluid, flow channels, elastomeric structure, and stoppers-all of which may introduce nonlinearity into the system.…”

Section: Introductionmentioning

confidence: 99%

“…Design features in these devices typically include pumping chambers with working fluid, flow channels, elastomeric structure, and stoppers-all of which may introduce nonlinearity into the system. As a result, hydraulic bushing configurations are often analyzed in terms of a "black box" [1,2,3]. The linear system theory could be used to characterize the device as a cross-point stiffness magnitude and loss factor, but only at a given displacement amplitude and preload.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Hydraulic Bushings with Measured Nonlinear Compliance Parameters

Fredette

Dreyer

Singh

2015

SAE Int. J. Passeng. Cars - Mech. Syst.

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Hydraulic bushings with amplitude sensitive and spectrally varying properties are commonly used in automotive suspension. However, scientific investigation of their dynamic properties has been mostly limited to linear system based theory, which cannot capture the significant amplitude dependence exhibited by the devices. This paper extends prior literature by introducing a nonlinear fluid compliance term for reduced-order bushing models. Quasi-linear models developed from step sine tests on an elastomeric test machine can predict amplitude dependence trends, but offer limited insight into the physics of the system. A bench experiment focusing on the compliance parameter isolated from other system properties yields additional understanding and a more precise characterization. Amplitude dependence predictions are improved in numerical simulations of the system while using the experimentally determined nonlinear compliance parameter, expanding the capabilities of reduced-order hydraulic bushing models.

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“…Hydraulic elastomeric devices are often employed in automotive powertrain and suspension systems because of their unique dynamic properties, leading to both vibration isolation and motion control [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. These properties are achieved by an internal fluid system working in tandem with the elastomeric structure of a bushing.…”

Section: Introductionmentioning

confidence: 99%

Harmonic amplitude dependent dynamic stiffness of hydraulic bushings: Alternate nonlinear models and experimental validation

Fredette

Dreyer

Rook

et al. 2016

Mechanical Systems and Signal Processing

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The dynamic stiffness properties of automotive hydraulic bushings exhibit significant amplitude sensitivity which cannot be captured by linear time-invariant models. Quasi-linear and nonlinear models are therefore proposed with focus on the amplitude sensitivity in magnitude and loss angle spectra (up to 50 Hz). Since the model parameters of a production bushing are unknown, dynamic stiffness tests and laboratory experiments are utilized to extract model parameters. Nonlinear compliance and resistance elements are incorporated, including their interactions in order to improve amplitude sensitive predictions. New solution approximations for the new system equations (containing both nonlinear compliance and resistance elements) refine the multi-term harmonic balance term method. Quasi-linear models yield excellent accuracy but lack the ability to predict trends in amplitude sensitivity since they rely on available dynamic stiffness measurements. Nonlinear models containing both nonlinear resistance and compliance elements yield superior predictions to those of prior models (with a single resistance or compliance nonlinearity), while also providing more physical insight. Suggestion for further work is briefly mentioned.

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Hydro Bushings - Innovative NVH Solutions in Chassis Technology

Cited by 18 publications

References 2 publications

Notice of Retraction: Development of an innovative method for researching the structural and related parameters effect on the dynamic behavior of hydrobushings

Notice of Retraction: Development of an innovative method for researching the structural and related parameters effect on the dynamic behavior of hydrobushings

Dynamic Analysis of Hydraulic Bushings with Measured Nonlinear Compliance Parameters

Harmonic amplitude dependent dynamic stiffness of hydraulic bushings: Alternate nonlinear models and experimental validation

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