Fatigue model of a disc valve system used in shock absorbers

Czop, Piotr; Sławik, D.

doi:10.1504/ijhvs.2017.10007644

Cited by 6 publications

(11 citation statements)

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“…Based on the literature [6,8,28], deformations of the valve shims are solved by choosing relevant algorithms from Roark's formulas for stress and strain described in the literature [27].…”

Section: Shim Valve Mathematical Modelmentioning

confidence: 99%

“…Nevertheless, in both above-mentioned works, it is proposed to apply Roark's formulas for stress and strain for calculation of deformation of a shim valve; in addition, an application of the superposition principle in the process of shim valve modelling is discussed. Linear and nonlinear models of a shim valve based on the principles of the finite element method, which evaluate the geometrical dimensions of the shims and the properties of the material, are presented in [6]. In this source, the results obtained on applying a linear model and a nonlinear model are compared between each other, their differences, complexity, variables of models are discussed; however, the results obtained on applying the mentioned models are not compared to the results obtained during experimental tests.…”

Section: Introductionmentioning

confidence: 99%

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Development and veriﬁcation of a shock absorber and its shim valve model based on the force method principles

Skačkauskas¹,

Žuraulis²,

Vadluga³

et al. 2016

EiN

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Development anD verification of a shock absorber anD its shim valve moDel baseD on the force methoD principles moDelowanie i ocena amortyzatora i jego zaworu talerzowego oparte na zasaDach metoDy sił SkAčkAuSkAS P, ŽurAuliS V, VAdlugA V, NAgurNAS S. development and verification of a shock absorber and its shim valve model based on the force method principles. Eksploatacja i Niezawodnosc -Maintenance and reliability 2017; 19 (1): 126-133, http://dx.doi.

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“…Based on the literature [6,8,28], deformations of the valve shims are solved by choosing relevant algorithms from Roark's formulas for stress and strain described in the literature [27].…”

Section: Shim Valve Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and veriﬁcation of a shock absorber and its shim valve model based on the force method principles

Skačkauskas¹,

Žuraulis²,

Vadluga³

et al. 2016

EiN

View full text Add to dashboard Cite

show abstract

“…In that aspect the models of Lang and Duym remain well-known benchmark models (Lang, 1977;Duym, 1997). Notable research studies include the extension of the original models towards higher frequencies (Czop, 2011;Benaziz et al, 2013), and improvements in modelling of the shims stiffness in the valves (Czop, 2009;Farjoud, 2012).…”

Section: Damper Modelingmentioning

confidence: 99%

Modeling and Operational Analysis of an Automotive Shock Absorber with a Tuned Mass Damper

Sikora¹

2018

Acta Mechanica Et Automatica

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Recently, the topic of energy dissipation efficiency of vehicle suspension dampers has become a research and engineering problem due to structural requirements of vehicle manufacturers and the introduction of electric/hybrid cars. By principle, any disturbances in the damping force generation process translate into pressure fluctuations to be then transferred to the body of the vehicle. The effect known as rattling within the damper engineering community is perceived as detrimental to ride comfort. To improve the performance of a vehicle damper several methods can be devised and used. One approach is to optimize the settings of the valves in the damper. The approach, however, often influences the force output of the damper. Another technique involves the application of add-on systems. One such system is the tuned mass damper concept originally developed by Frahm for structural engineering applications. In the paper the author proposes a damper concept equipped with an external/internal tuned mass damper component for improving the dynamic characteristics of vehicle dampers. The author presents modeling details followed by simulations of the damper with the tuned mass damper concept subjected to oscillatory inputs, and a critical analysis of the presented results.

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“…This triggers changes in the courses of damping forces for high frequencies on low amplitudes. A specific maximum value of input velocity may be obtained in two ways, that is, by changing the operating stroke length on constant input function frequency ( Figure 13) or, on constant stroke length, by changing the input function frequency (Figure 14) [26,[32][33][34][35].…”

Section: Effect Of Input Function Parameters On Damping Characteristicsmentioning

confidence: 99%

Analysis of Simplifications Applied in Vibration Damping Modelling for a Passive Car Shock Absorber

Konieczny

2016

Shock and Vibration

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The paper presents results of research on hydraulic automotive shock absorbers. The considerations provided in the paper indicate certain flaws and simplifications resulting from the fact that damping characteristics are assumed as the function of input velocity only, which is the case of simulation studies. An important aspect taken into account when determining parameters of damping performed by car shock absorbers at a testing station is the permissible range of characteristics of a shock absorber of the same type. The aim of this study was to determine the damping characteristics entailing the stroke value. The stroke and rotary velocities were selected in a manner enabling that, for different combinations, the same maximum linear velocity can be obtained. Thus the influence of excitation parameters, such as the stroke value, on force versus displacement and force versus velocity diagrams was determined. The 3D characteristics presented as the damping surface in the stoke and the linear velocity function were determined. An analysis of the results addressed in the paper highlights the impact of such factors on the profile of closed loop graphs of damping forces and point-type damping characteristics.

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Fatigue model of a disc valve system used in shock absorbers

Cited by 6 publications

References 0 publications

Development and veriﬁcation of a shock absorber and its shim valve model based on the force method principles

Development and veriﬁcation of a shock absorber and its shim valve model based on the force method principles

Modeling and Operational Analysis of an Automotive Shock Absorber with a Tuned Mass Damper

Analysis of Simplifications Applied in Vibration Damping Modelling for a Passive Car Shock Absorber

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