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A. Tondl, H. Ecker:
"Suppression of self-excited vibrations in valve systems: passive means";
Talk: Dynamics of Machines 2007, Prague; 2007-02-06 - 2007-02-07; in: "Proceedings Dynamics of Machines 2007", L. Pesek (ed.); Institute of Thermomechanics, ASCR, Prague (2007), ISBN: 978-80-87012-03-1; 185 - 192.

Self-excited vibrations of valves due to the flowing medium represent an unfavorable effect and danger for some systems, e.g. pipe systems. The dynamics of a basic valve system is modelled by using an additional differential equation expressing the effect that the resulting dynamic force acting on the valve is delayed with respect to the static force component. The static force is created by the inertial force of the flowing medium at a steady state position of the valve. This basic system is connected to a mass-spring subsystem by which the opening of the valve is controlled. The subsystem is damped, which represents the passive means of vibration suppressing. The conditions for stabilization of the equilibrium position are presented using the transformation of the differential equations of the disturbed motion into the quasi-normal form.

Self-excitation, passive vibration suppression, valve system

Project Head Horst Ecker:
Schwingungsunterdrückung durch Parametererregung