中低速磁浮最小曲线半径及缓和曲线长度研究

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Abstract In order to study the minimum curve radius and transition curve length of medium and low speed maglev, this paper deduces the calculation formula of curve radius and transition curve length suitable for medium and low speed maglev based on the calculation method of maglev traffic line parameters, related factors, and the characteristics of the line itself. On the basis of referring to relevant standards, a theoretical analysis is carried out on the minimum horizontal and vertical curve radius and the length of the transition curve when the medium and low speed maglev trains run at a speed of 20~160 km/h, and their recommended values are further given. The reliability of the value is verified with the dynamic simulation of the vehicle model with feedback control characteristics. The research results show that the radius of the minimum horizontal curve is controlled with the maximum lateral acceleration pointing to the outside, and the radius of the minimum vertical curve is controlled with the maximum normal acceleration on the concave curve. When the train speed is fixed, the larger the horizontal slope angle, the smaller the minimum flat curve radius value, and the longitudinal slope has almost no effect on the minimum vertical curve radius value; When the cross slope angle is 2° and the train is running under normal conditions, the length of the minimum transition curve is mainly controlled with the maximum lateral impact, when running under difficult conditions, the length of the minimum transition curve is mainly controlled with the maximum normal impact. When the cross slope angle is 4° or 6° and the train is running under normal/difficult conditions, the minimum transition curve length is mainly controlled with the maximum normal shock; Considering the maximum cross-slope angle of 6°, when the train is operating at 160 km/h under normal conditions, it is suggested that the radius of the minimum horizontal curve and the length of the transition curve should be taken as 970 m and 120 m respectively. The research results of this paper can provide theoretical basis and data reference for the route selection design of medium and low speed maglev traffic.

Key words： medium-low speed maglev curve radius transition curve acceleration impact

Received: 27 February 2023 Published: 28 March 2024

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	LIN Yuanyang
	LI Miao
	MA Weihua
	WANG Bo
	ZHANG Min
	ZUO Feifei

Cite this article:

LIN Yuanyang,LI Miao,MA Weihua, et al. Minimum curve radius and transition curve length of a medium and low speed maglev[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(6): 301-310.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I6/301

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