Regularity of Vibration Superposition after the Vehicle Passes through the Intermediate Straight Line between Curves

DOI

10.2991/msam-17.2017.46How to use a DOI?

Keywords

intermediate straight line; regularity of vibration superposition; genetic algorithms; horizontal alignment combination; vehicle-line vibration model

Abstract

In order to analyze the regularity of vibration superposition after the vehicle passes through the intermediate straight line between reverse (same-sense) curves, a vertical dynamic model of vehicle-line system was established in the study. First, the most unfavorable horizontal alignment combination for carbody vibration at different riding speeds and the maximum vertical vibration acceleration of carbody were determined using Genetic Algorithms (GA). And then the change characteristics of the maximum carbody vibration acceleration with the length of intermediate straight line, riding speed and superelevation gradient of transition curve in rear of intermediate straight line were analyzed. The results show that: when a vehicle travels through the reverse (same-sense) curve of most unfavorable alignment combination corresponding to different speeds, the maximum vertical carbody vibration acceleration in transition curve in rear of intermediate line will increase with the riding speed. Within a certain length, longer intermediate straight line may not help mitigating the superposition effect of carbody vibration, and greater riding speed do not necessarily result in greater vertical carbody vibration. The maximum vertical vibration acceleration of carbody when the train travels in reverse (same-sense) curve follows the same attenuation rule. It attenuates as per the natural vibration period and stabilizes basically after two periods. The maximum vibration acceleration of carbody after stabilization increases with enlarging the riding speed and the superelevation gradient of the transition curve in rear of intermediate straight line; further, the maximum vibration accelerations of carbody at the same riding speeds and superelevation gradients are the same.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Biao Wang
AU  - Kaize Xie
AU  - Ping Wang
AU  - Ying Zhu
PY  - 2017/03
DA  - 2017/03
TI  - Regularity of Vibration Superposition after the Vehicle Passes through the Intermediate Straight Line between Curves
BT  - Proceedings of the 2017 2nd International Conference on Modelling, Simulation and Applied Mathematics (MSAM2017)
PB  - Atlantis Press
SP  - 203
EP  - 208
SN  - 1951-6851
UR  - https://doi.org/10.2991/msam-17.2017.46
DO  - 10.2991/msam-17.2017.46
ID  - Wang2017/03
ER  -