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A Novel Snake-Like Model to Simulate Infinite Track for Vehicle–Track Coupling Vibration
International Journal of Structural Stability and Dynamics ( IF 3.6 ) Pub Date : 2021-07-29 , DOI: 10.1142/s0219455421501601
Tao Xin 1, 2 , Pengsong Wang 1 , Xiaopei Cai 1, 2 , Sen Wang 1 , Peng Chen 3
Affiliation  

The dynamic interaction between the vehicle and track is one of the most critical issues for railways, as it is closely related to running safety. Previously, many vehicle–track coupling models have been developed to study the vibration response of the system. Even though the track is periodic and infinitely extended, only a finite length of the track has often been used in the simulation, so as to reduce the effort of computation. For some special issues, it is necessary to consider the influence of long-wavelength track irregularities on the vehicle responses, and the characteristic track length can reach up to the scale of kilometer. In practice, the computational effort of using a model to accommodate kilometer-long tracks is costly and even unacceptable. To overcome this problem, this paper proposes a novel snake-like model inspired by the famous game Snake to simulate infinite tracks. In the snake-like model, each vehicle can travel on the track repeatedly via the transfer nodes installed at the end of the track. Two examples were presented to verify the accuracy and efficiency of the model proposed. The results showed that the accuracy of snake-like model is consistent with that of existing methods, but the computational effort has been reduced significantly.

中文翻译:

一种新的蛇形模型来模拟车辆-轨道耦合振动的无限轨道

车辆与轨道之间的动态相互作用是铁路最关键的问题之一,因为它与运行安全密切相关。以前,已经开发了许多车辆-轨道耦合模型来研究系统的振动响应。尽管轨道是周期性的且无限延伸的,但在模拟中经常只使用有限长度的轨道,以减少计算工作量。对于一些特殊问题,需要考虑长波轨迹不平顺性对车辆响应的影响,特征轨迹长度可达千米级。在实践中,使用模型来适应千米长的轨道的计算工作成本很高,甚至是不可接受的。为了克服这个问题,本文提出了一种新颖的类蛇模型,其灵感来自著名的游戏 Snake 来模拟无限轨迹。在蛇形模型中,每辆车可以通过安装在轨道末端的传输节点在轨道上重复行驶。给出了两个例子来验证所提出模型的准确性和效率。结果表明,蛇形模型的准确性与现有方法的准确性一致,但计算量明显减少。
更新日期:2021-07-29
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