Investigation of Frictional Stick-Slick Effect in Disk Brake NVH

Úradníček, Juraj; Kraus, Pavel; Musil, M; Bachratý, Michal

doi:10.1515/scjme-2017-0010

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…In a real physical environment, more physical aspects are involved in the process of dynamic destabilization. It can be demonstrated that nonlinear effects in friction contact, such as stick slip [10] or contact surfaces detaching [11], lead into limit cycles of vibrations. These effects bring perturbations to the system.…”

Section: Resultsmentioning

confidence: 99%

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Eigenvalues Evaluation of Generally Damped Elastic Disc Brake Model Loaded With Non-Conservative Friction Force

Úradníček¹,

Musil²,

Bachratý

2020

Acta Polytech

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This paper deals with the evaluation of eigenvalues of a linear damped elastic two-degrees-of-freedom system under a non- onservative loading. As a physical interpretation of a proposed mathematical model, a simplified disk brake model is considered. A spectral analysis is performed to predict an eigenvalues bifurcation, known as the Krein collision, leading to double eigenvalues, one of them having a positive real part causing a vibration instability of the mechanical systems. This defective behaviour of eigenvalues is studied with respect to a magnitude of non-conservative Coulomb friction force, through the variation of the friction coefficient. The influence of a proportional versus general damping on the system stability is further analysed. The generalized non-symmetric eigenvalue problem calculation is employed for spectral analyses, while a modal decomposition is performed to obtain a time-domain response of the system. The analyses are compared with an experiment.

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Section: Resultsmentioning

confidence: 99%

“…the homogeneous response of the system can be expressed as a weighted superposition of the system modes e λit v ri where an initial condition y(0) affects the strength of an excitation of each mode ri (r ri y(0) (10) where the scalar coefficient c i = r ri y(0).…”

Section: Modal Decompositionmentioning

confidence: 99%

Eigenvalues Evaluation of Generally Damped Elastic Disc Brake Model Loaded With Non-Conservative Friction Force

Úradníček¹,

Musil²,

Bachratý

2020

Acta Polytech

Self Cite

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“…However, in Figure 13, it is observable that the function has an exponential course, with the rolls diameter of the proposed production compactor not reaching 0.185 m, so that the proposed diameter is also able to compensate for the local maximum pressure extremes p m between the rolls of the compactor. This method of designing the compactor roll could be used in the design of processing technology not only for fertilizers but also for other applications of the compacting of a particulate material (for example, dust from production of brake linings [12,20] following the elimination of the problems in this area [21,22] …”

Section: Resultsmentioning

confidence: 99%

Design of Particulate Material Compactor Rolls Diameter

et al. 2017

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Abstract. At present, in a period of an industrial expansion great emphasis is placed on the environment. That means aiming for a reduced energy consumption, and also lessening dustiness from very fine powder material. This category also includes particulate material agglomeration processes. Because this process is very energy-intensive, it is necessary to correctly design these devices. The aim of this paper is to focus on a theoretical design of a production compactor with the rolls diameter for an experimental particulate material, based on Johanson's theory and experimentally measured material properties. The material used for experimental measurements was an NPK-based industrial fertilizer consisting of several components. The results of this paper is the dependence of the ratio of the maximum compression pressure to the initial compression pressure from the rolls diameter of the proposed compactor.

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“…Cha [6] proposed the numerical model to describe the stick-slip phenomenon. Juraj [7] investigated the effect of stick-slip friction in disk break NVH to find out self-excited vibrations due to stick-slip and also stability conditions by using a 1-DOF mechanical system.…”

Section: Introductionmentioning

confidence: 99%

The Structural Material Property Analysis of CNC Machine Tools Based on Tribology Applied Method

Hwang

Adhitya

2021

Advances in Science and Technology

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Tribology applied method (TAM) is a method to investigate the interacting surface in relative motion includes the principles of friction, lubrication, and wear. The main objective of this study is to investigate the effect of structural material property on Multi-body dynamic. The stick-slip friction (SSF) and the contact normal force is used as influence of machine tools in numerical simulation. The numerical simulation is conducted on three axes CNC machine without friction, with sliding friction and with SFF to find out the effect of the influence parameter. The PID controller is used as the compensation in the numerical simulation. The result show that the unsmooth motion of CNC machine due the friction will affect the accuracy and the performance of the CNC machine.

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Investigation of Frictional Stick-Slick Effect in Disk Brake NVH

Cited by 6 publications

References 8 publications

Eigenvalues Evaluation of Generally Damped Elastic Disc Brake Model Loaded With Non-Conservative Friction Force

Eigenvalues Evaluation of Generally Damped Elastic Disc Brake Model Loaded With Non-Conservative Friction Force

Design of Particulate Material Compactor Rolls Diameter

The Structural Material Property Analysis of CNC Machine Tools Based on Tribology Applied Method

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