High-speed railway line design and evaluation method based on train-track system dynamics

Abstract

The invention discloses a high-speed railway line design and evaluation method based on train-track system dynamics. Body vibration response caused by high-speed railway line types is mainly concentrated within the range of low frequency below 1Hz, in order to effectively distinguish body vibration caused by the line types, line smoothness, offline structure rigidity and the like, indexes such as motion sickness, comfort, transition curve comfort and instantaneous comfort in standards such as ISO2631 and EN12299 are introduced by a system dynamic simulation method, reasonableness of line type parameters and line schemes is comprehensively analyzed and evaluated according to acceleration frequency distribution and cumulative frequency distribution, and basis is provided for determining the line type parameters and optimizing the line schemes. The method can overcome the shortcomings of a traditional line analysis method, running safety and riding comfort are forecasted, analyzed and evaluated under the condition of optional plane and profile section line type combination, a scientific analysis method is provided for high-speed railway line design, and the method has an important theoretical significance and engineering application values.

Description

technical field [0001] The invention relates to the technical field of railway engineering; in particular, it relates to a high-speed railway line design and evaluation method based on train line system dynamics. Background technique [0002] The operating speed of high-speed railways has been greatly increased, and the dynamic interaction between trains and lines has been significantly enhanced. Operation practice shows that the vibration attenuation period of high-speed trains is long, and the superposition of vibrations has a significant impact on comfort. Low-frequency vibrations caused by line shape changes under high-smooth conditions have become one of the main factors affecting passenger ride comfort. The reasonable selection of alignment parameters of high-speed railway lines and the evaluation and optimization of alignment have become important issues to be solved urgently. [0003] For a long time, the determination of railway line design parameters in my country...

AI Technical Summary

Problems solved by technology

However, the dynamic response of the system caused by the alignment of the line is very different from that caused by the offline structure. First, the vibration generated is mainly in the low frequency range. Under high-speed driving conditions, the vibration generated by adjacent alignments is similar to that of long-wave irregularities. The second is the analysis of vibration. From the consideration of pure amplitude, it is difficult to distinguish the influence of linearity.

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