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15-10-2018 | Original | Issue 7/2019

Archive of Applied Mechanics 7/2019

Bifurcation analysis of railway bogie with yaw damper

Journal:
Archive of Applied Mechanics > Issue 7/2019
Authors:
Yong Yan, Jing Zeng, Caihong Huang, Tingting Zhang
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Abstract

Yaw damper, widely employed in high-speed railway vehicles, has played an important role in improving the hunting stability. This paper mainly makes a comprehensive analysis on the effect of yaw damper with its series stiffness value on the stability and bifurcation type of the railway bogie. With the prerequisite of the linear critical speed calculated by mathematical method, Center Manifold Theorem is adopted to reduce the dimension of the model to a planar dynamical system. And the symbolic expression associated with yaw damper and its series stiffness to determine bifurcation type at the critical speed is obtained by the method of Normal Form. As a result, the influence of the variation tendency of the yaw damper and series stiffness on the bifurcation type of the bogie is given qualitatively in contrast to different couples. Finally, numerical analysis of corresponding bifurcation diagrams is given to verify the accuracy of the conclusion.

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