Key Takeaways & Executive Findings
- •• Machine vision monitoring of five posture parameters reveals that the anti-wind tunnel with holes provides superior posture stability compared to other windbreaks. • In tunnel sections, the tail car exhibits larger posture amplitudes than the head car, while the opposite is observed in non-tunnel sections. • During tunnel transit, posture amplitudes peak at a specific speed, indicating a critical speed that most adversely affects operating posture. • The findings provide crucial insights for enhancing operating safety and ride comfort of conventional passenger trains under crosswind conditions.
Abstract
Considering passenger trains' key role in remote regions, this study employed machine vision technology to monitor five posture parameters of the second car of a conventional passenger train, aiming to investigate the influence of windbreaks and crosswinds along railways on the operating postures of conventional passenger trains. The study found that when passing through the anti-wind tunnel with holes, the amplitudes of posture parameters were smaller than those of other windbreaks, demonstrating the superior performance of this windbreak in maintaining posture stability compared to others. In tunnel sections, larger amplitudes of these parameters were observed for the tail car than the head car, while the opposite occurred in non-tunnel sections. Notably, during tunnel transit, their amplitudes did not increase monotonically with speed but peaked at a specific speed that most adversely affected the operating posture. These conclusions have a great significance for improving operating safety under crosswinds.
1. Introduction
With the continuous expansion of China's railway network, newly built railways increasingly cross regions with frequent strong winds. Under the influence of strong winds, the operating postures of the trains can become complex, polytropic, or even extreme. Most existing studies have focused on safety, particularly the overturning potential of trains under strong winds [1−6]. Fortunately, owing to the continuous progress in railway technology as well as the construction and improvement of wind protection facilities along railways in regions of China with frequent strong winds, the risk of train overturning or derailment is low, and safe train operation is effectively guaranteed. However, ride comfort has also become an important indicator of train performance, and the stability of the train operating posture is critical for ensuring a comfortable ride [7].
Most existing studies on operating posture focus on high-speed trains, whereas research on the operating posture of conventional passenger trains is primarily based on simulation. In regions with complex geographic environments and frequent strong winds, e.g., Xinjiang and Xizang, extreme weather often causes severe operational disruptions, and derailment incidents have even occurred—for example, Train 5807 suffered a derailment on the Southern Xinjiang Railway in 2007 due to strong crosswinds. An in-depth study under strong crosswinds of the operating posture of conventional passenger trains is needed to ensure a good riding experience and to understand the effects of different windbreaks in regions of strong wind. This study is also of great significance for enhancing train speed in Xinjiang, Xizang, and other regions.
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PANG Jia-hong, ZHOU Wei, SHI Chong, LI Tian, LIU Dong-run (2025). Full-scale test of the effects of crosswinds on the operating posture of passenger trains. Journal of Central South University. https://doi.org/10.1007/s11771-025-6152-7
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Frequently Asked Questions
What is the main objective of this study?
The study aims to investigate the influence of windbreaks and crosswinds on the operating postures of conventional passenger trains using machine vision technology, focusing on five posture parameters of the second car.
Which windbreak showed superior performance in maintaining posture stability?
The anti-wind tunnel with holes demonstrated superior performance, as posture parameter amplitudes were smaller compared to other windbreaks.
How did posture amplitudes differ between head and tail cars in tunnel and non-tunnel sections?
In tunnel sections, the tail car exhibited larger posture amplitudes than the head car, while the opposite was observed in non-tunnel sections.
What was the notable finding regarding speed and posture amplitudes during tunnel transit?
During tunnel transit, posture amplitudes did not increase monotonically with speed but peaked at a specific speed that most adversely affected the operating posture.
What is the significance of this study for railway operations?
The findings are significant for improving operating safety and ride comfort of conventional passenger trains under crosswind conditions, particularly in regions with frequent strong winds like Xinjiang and Xizang.
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