Static validation of a model of a disc valve system used in shock absorbers

Czop, Piotr; Sławik, D.; Śliwa, P.

doi:10.1504/ijvd.2010.034104

Cited by 14 publications

(26 citation statements)

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“…The relation between vertical displacement at a specified radius and applied pressure is fairly linear for small deflections. For deflections larger than one-half the disc thickness, stress in the middle surface is not negligible and the relation turns nonlinear [27]. The radial tension of the middle surface is balanced with circumferential compression, which may cause buckling.…”

Section: Prmentioning

confidence: 99%

A shock absorber model for structure-borne noise analyses

Benaziz

Nacivet

Thouverez

2015

Journal of Sound and Vibration

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Section: Prmentioning

confidence: 99%

A shock absorber model for structure-borne noise analyses

Benaziz

Nacivet

Thouverez

2015

Journal of Sound and Vibration

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“…where A rod , A com , A reb are the areas (m 2 ) of the rod, compression, and rebound side of the piston; p com , p reb are the pressures (Pa) in the compression and rebound chambers; p 0 is the atmospheric pressure, p 0 = 1 × 10 5 Pa; and F fric is the dry friction force between the piston and pressure tube.…”

Section: The Model Of a Hydraulic Damper And Servo-hydraulic Testermentioning

confidence: 99%

“…The roles of a hydraulic damper working in vehicle suspension are, in a sense, contradictory. First, an ideal hydraulic damper should guarantee good road handling, 1 second, it has to be designed for durability, 2 third, the radiated noise and emitted vibrations should have as little power as possible, 3 and lastly, it should ensure passenger comfort. Noise is the audible effect of structural and forced vibrations, and its reduction is carried out by hydraulic damper manufacturers as a product design and optimization activity.…”

Section: Introductionmentioning

confidence: 99%

Development of an optimization method for minimizing vibrations of a hydraulic damper

2013

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The aim of this paper is to provide a mathematical method for minimizing the vibrations produced by hydraulic dampers, while maintaining the same damping force characteristics. The vibration level depends on the force–pressure characteristics of valve systems, which determine the damping force and high-frequency acceleration characteristic of a damper, and which need to be optimally tuned to lower the noise level. The paper considers a model-based approach to obtain the optimal pressure–flow characteristic via simulations conducted with the use of coupled models, including the damper and the servo-hydraulic tester model. The objectives of this work were as follows: (i) develop or adapt a double-tube damper model including pressure–flow valve characteristics; (ii) define key parameters of the valve characteristics influencing the high-frequency piston-rod acceleration, which is considered as a measure of vibration level; (iii) identify the parameter values (trends) minimizing the piston-rod acceleration using two alternative methods, namely a quick-and-dirty method based on a design of experiment (DOE) plan and a nonlinear programming method; (iv) obtain the optimal pressure–flow characteristic minimizing the vibration level by means of simulation; and (v) perform an experimental study comparing the high-frequency content of acceleration produced by the damper assembled with the original and optimized valve system using a laboratory setup.

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“…To further explain the contribution of a stack of plates’ corresponding components, including the plastic deformation phenomenon and simulation of complex cases, an advanced valve-system model has been developed by Czop et al 15 The proposed method uses FE discretization to model the behavior of a circular plate stack.…”

Section: Problem Descriptionmentioning

confidence: 99%

“…The bottom support is modeled as a rigid body. In the paper, an advanced nonlinear FE model described originally by Czop et al is used 15 . The model was prepared in the Abaqus software environment.…”

Section: Problem Descriptionmentioning

confidence: 99%

A nonlinear, data-driven model applied in the design process of disc-spring valve systems used in hydraulic dampers

et al. 2012

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This paper proposes an analytical tool that supports the design process of a disc-spring valve system used in hydraulic dampers. Such a valve is representative of a broader family of valve systems used in many industrial applications. The tool will speed up the valve-system design process. The paper considers a valve system that combines a number of circular metal plates, referred to further in the paper as ‘a stack of plates’. The proposed analytical tool obtains a key design characteristic of a valve, the flow rate, and the corresponding maximum stress level in the stack of plates as a function of pressure load. The stress level enables the ranking of valve settings in terms of durability. The calculation process is based on the response of a nonlinear, data-driven model that approximates the a priori simulated cases to cover the complete range of input design parameters, namely the number of plates, their thickness and their diameter. The cases are produced by a first-principle model using a Finite Element (FE) approach. The model was calibrated based on experimental results to provide accurate results in the entire range of input parameters. The advantage of the analytical tool is its ability to immediately provide the pressure-stress-flow characteristic of a valve instead of repeating time-consuming calculations for each new setting of input parameters. The objectives of the paper are as follows: to (a) adapt the model to a three-plate stack by applying large strain theory, (b) select and rank the Artificial Neural Networks used in order to approximate simulation data, and (c) demonstrate validation and application results obtained with the Approximation Tool.

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Static validation of a model of a disc valve system used in shock absorbers

Cited by 14 publications

References 0 publications

A shock absorber model for structure-borne noise analyses

A shock absorber model for structure-borne noise analyses

Development of an optimization method for minimizing vibrations of a hydraulic damper

A nonlinear, data-driven model applied in the design process of disc-spring valve systems used in hydraulic dampers

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