Self-sustained oscillations of a magnetic track brake frame

被引：0

作者：

Avramov, Konstantin ^{[1
,2
,3
]}

Ebner, Bernhard ^{[4
]}

Edelmann, Johannes ^{[4
]}

Mikhlin, Yuri V. ^{[5
]}

Uspensky, Borys ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Anatolii Pidhornyi Inst Power Machines & Syst, Kharkiv, Ukraine

[2] Kharkiv Natl Univ Radio Elect, Dept Tech Syst, Kharkiv, Ukraine

[3] Natl Aerosp Univ N Ye Zhukovsky KhAI, Dept Aircraft Strength, Kharkiv, Ukraine

[4] TU Wien, Christian Doppler Lab Enhanced Braking Behav Railw, Vienna, Austria

[5] Natl Tech Univ, Kharkiv Polytech Inst, Dept Appl Math, Kharkiv, Ukraine

来源：

NONLINEAR DYNAMICS | 2024年

基金：

新加坡国家研究基金会;

关键词：

Electromagnetic track brake; Self-excited vibration; Poincare sections; Nonlinear normal mode; Bifurcation; Electromagnetic-mechanical coupling; STICK-SLIP VIBRATIONS; DRY-FRICTION; STABILITY; DYNAMICS; BIFURCATION; SYSTEMS; MOTION; CHAOS; FORCE;

D O I：

10.1007/s11071-024-10643-6

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Magnetic track brakes (MTBs) are additional brake systems for railway vehicles used in low-adhesion and emergency conditions. In particular, the frame of this brake may exhibit self-sustained vibrations. To study the underlying mechanisms of these oscillations, a nonlinear mathematical model of the MTB is derived that consists of two submodels: a mathematical model of the mechanical subsystem and a model of the coupled electro-magnetic subsystem. Mechanical vibrations of the brake-frame are described by four degrees of freedom. Nonlinear dry friction, which is observed between the rail and the frame, is accounted for in the mechanical model. The coupled electromagnetic subsystem is modelled by a lumped parameter approach, describing the oscillating magnetic fluxes due to the mechanical motion of each electromagnet. The self-sustained vibrations are studied numerically for different vehicle velocities. The Neimark-Sacker bifurcation is observed. As a result of this bifurcation, the self-sustained quasi-periodic vibrations are originated. The stick-slip motions of the frame are observed, caused by the dry friction between the rail and the magnet.

引用

页数：22

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