Blades Couple Dry Friction Connection

0446392 - ÚT 2016 RIV CZ eng J - Journal Article
Půst, Ladislav - Pešek, Luděk - Radolfová, Alena
Blades Couple Dry Friction Connection.
Applied and Computational Mechanics. Roč. 9, č. 1 (2015), s. 31-40. ISSN 1802-680X
Institutional support: RVO:61388998
Keywords : stick-slip dry friction * 3D friction characteristic * tangential contact stiffness * hysterezis loop * response curves
Subject RIV: BI - Acoustics

Vibration of blade couple damped by a dry friction contact in shroud is investigated by means of hysterezis loops and response curves analysis of blades couple. The studied system is excited by one harmonic external force in frequency range near to the lowest eigenfrequency of real blades. Blades are connected by means of damping element consisting of dry friction part linked in series with linear spring. This “stick-slip” damping element is supposed either weightless or with a very small mass modeling elastically deformed parts of contacting bodies near the friction surface. Two approximate mathematical models of “stick-slip” dry friction elements are suggested and analysed. Response curves of blades couple connected by stick-slip damping element are presented for different values of slip friction forces and two values of mass of elastically deformed parts.
Permanent Link: http://hdl.handle.net/11104/0248483