Hopf bifurcation analysis of railway bogie

Hopf bifurcation analysis of railway bogie
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铁路转向架Hopf分岔分析

DOI:
10.1007/s11071-017-3634-7
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发表时间:
2018-04
期刊:
影响因子:
5.6
通讯作者:
曾京
曾京
中科院分区:
工程技术2区
文献类型:
--
作者:
Yan Yong;曾京

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铁路转向架作为铁路最重要的运行部件,直接关系到整个车辆系统的动力性能。转向架的分岔类型受车辆参数的影响,将决定车辆狩猎稳定性的行为。本文主要分析了偏航阻尼器和车轮踏面形状对铁路转向架稳定性和岔型的影响。采用中心流形定理对转向架动力学模型进行降维,并采用范式法得到了确定转向架临界转速分岔类型的符号表达式。定性地给出了偏航阻尼器对转向架分岔类型的影响,并与典型的高低胎面有效圆锥度的车轮型线进行了对比。此外,给出了车轮踏面参数变化的分岔类型判别式,描述了车轮踏面参数动态特性的变化趋势。最后,通过数值分析给出了相应的分岔图。
The railway bogie, the most important running component, has direct association with the dynamic performance of the whole vehicle system. The bifurcation type of the bogie that is affected by vehicle parameters will decide the behavior of the vehicle hunting stability. This paper mainly analyzes the effect of the yaw damper and wheel tread shape on the stability and bifurcation type of the railway bogie. The center manifold theorem is adopted to reduce the dimension of the bogie dynamical model, and the symbolic expression for determining the bifurcation type at the critical speed is obtained by the method of normal form. As a result, the influence of yaw damper on the bifurcation type of the bogie is given qualitatively in contrast to typical wheel profiles with high and low wheel tread effective conicities. Besides, the discriminant of bifurcation type for the wheel tread parameter variation is given which depicts the variation tendency of dynamics characteristics. Finally, numerical analysis is given to exhibit corresponding bifurcation diagrams.
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