The effect of friction in coulombian damper

The study aimed to analyze the damping phenomenon in a system with variable friction, Stribeck type. Shock absorbers with limit and dry friction, is called coulombian shock-absorbers. The physical damping vibration phenomenon, in equipment, is based on friction between the cushioning gasket and the...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-02, Vol.174 (1), p.12021
Main Authors: Wahad, H S, Tudor, A, Vlase, M, Cerbu, N, Subhi, K A
Format: Article
Language:English
Subjects:
Coefficient of friction
Contact pressure
Differential equations
Dry friction
Friction
Lubricants
Mathematical analysis
Shock absorbers
Vibration damping
Washing machines
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Summary:The study aimed to analyze the damping phenomenon in a system with variable friction, Stribeck type. Shock absorbers with limit and dry friction, is called coulombian shock-absorbers. The physical damping vibration phenomenon, in equipment, is based on friction between the cushioning gasket and the output regulator of the shock-absorber. Friction between them can be dry, limit, mixture or fluid. The friction is depending on the contact pressure and lubricant presence. It is defined dimensionless form for the Striebeck curve (µ friction coefficient - sliding speed v). The friction may damp a vibratory movement or can maintain it (self-vibration), depending on the µ with v (it can increase / decrease or it can be relative constant). The solutions of differential equation of movement are obtained for some work condition of one damper for automatic washing machine. The friction force can transfer partial or total energy or generates excitation energy in damper. The damping efficiency is defined and is determined analytical for the constant friction coefficient and for the parabolic friction coefficient.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/174/1/012021