Dynamics with Friction: Modeling, Analysis and Experiment

Guran, Ardéshir; Pfeiffer, Friedrich; Popp, Karl

doi:10.1142/3110

Cited by 23 publications

(8 citation statements)

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“…7a and 8a displays that a hundredfold increase in the frequency causes almost a hundredfold decrease in the friction force. This fact can be explained by the hydrodynamic lubrication effect (squeeze effect) described in Guran et al (1996). Hence, lack of tappet revolutions, depicted in Fig.…”

Section: Discussionmentioning

confidence: 92%

Analysis of dynamics and friction resistance in the cam-tappet system

Siczek

Stefański

2019

Journal of Theoretical and Applied Mechanics

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In this paper, the influence of friction resistance and mutual contact interaction on dynamical properties of the cam-tappet mechanism is analyzed. A dynamical model of the cam-tappet contact has been developed. Chosen results of numerical simulations of this model are presented for cases with and without oil lubrication in contact zones. Various phenomena accompanying the cam-tappet contact dynamics have been observed, e.g., change of the global direction of tappet rotation, local oscillation of these revolutions, changes of friction in function of frequency of the camshaft longitudinal vibrations. We confirm, that the growing amplitude of camshaft longitudinal vibration causes an increase in the tappet rotational speed, whereas its reducing to small values leads to stopping the tappet rotation.

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Section: Discussionmentioning

confidence: 92%

Analysis of dynamics and friction resistance in the cam-tappet system

Siczek

Stefański

2019

Journal of Theoretical and Applied Mechanics

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“…So one resorts to approximate representations at a macro scale, e.g., by using multibody dynamics and finite element modeling. But also at the macro scale it is very difficult to construct universally valid phenomenological models of material damping, internal friction and friction forces, [13,14].…”

Section: Derivation Of the Disk Brake Modelmentioning

confidence: 99%

Numerical methods for parametric model reduction in the simulation of disk brake squeal

Gräbner

Mehrmann

Quraishi

et al. 2016

Z. Angew. Math. Mech.

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We present numerical methods for model reduction in the numerical simulation of disk brake squeal. Automotive disk brake squeal is a high frequency noise phenomenon based on self excited vibrations. Our method is based on a variation of the proper orthogonal decomposition method and involves the solution of a large scale, parametric eigenvalue problem. Several important challenges arise, some of which can be traced back to the finite element modeling stage. Compared to the current industrial standard our new approach is more accurate in vibration prediction and achieves a better reduction in model size. This comes at the price of an increased computational cost, but it still gives useful results when the classical modal reduction method fails to do so. We illustrate the results with several numerical experiments, some from real industrial models, some from simpler academic models. These results indicate where improvements of the current black box industrial codes are advisable.

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“…However, the mathematical treatment of non-linear dynamics linked with friction, see e.g. [20][21][22][23][24][25][26], is subject of intensive research world wide and is not further considered here.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Passive Damping Device for Sandwich Structures

Romberg¹

2010

MENG

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In many technical areas structural vibration loads are safety critical design drivers. Here, the improvement of reliability and safety, the reduction of mass, the extension of service life, as well as the reduction of manufacturing cost are desired. Especially lightweight structural design in general is a compromise between mass and robustness with regard to dynamic loads. The structural stresses and strains due to displacements caused by dynamic loads can be reduced by mechanical damping based on passive or active measures. Passive damping systems do not require electronics, control algorithms, power, actuators, sensors or complex maintenance. The simple physical effect of passive dampers is based on the dissipation of load induced energy. The patent DE10138250 (November 2008) described in the present paper is based on the function of a very simple passive friction-damping device for sandwich structures. Regarding this invention, passive friction elements are placed between the face sheets of composite sandwich panels. The damping effect is verified by simple tests.

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Dynamics with Friction: Modeling, Analysis and Experiment

Cited by 23 publications

References 0 publications

Analysis of dynamics and friction resistance in the cam-tappet system

Analysis of dynamics and friction resistance in the cam-tappet system

Numerical methods for parametric model reduction in the simulation of disk brake squeal

Passive Damping Device for Sandwich Structures

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