离散元件建模实形杆角度对卧床侧面阻力影响的效果
Jafar Chalabii1, Richard Nagy2, Majid Movahedi Rad3
1Department of Structural and Geotechnical Engineering, Széchenyi István University, Egyetem tér 1, Győr, 9026, Hungary.
Scientific reports
|December 11, 2025
概括
压力板的角性显著影响铁路轨道床的稳定性和列车负载下的横向阻力. 更多的角质压载物颗粒导致降低降解和增强轨道稳定性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 地质技术工程 地质技术工程
- 铁路工程 铁路工程是指铁路工程.
背景情况:
- 铁路轨道床的性能对于安全和高效的火车运行至关重要.
- 压载物质的特性,特别是粒子角性,显著影响轨道床的机械行为.
- 了解压角度的作用是提高轨道稳定性和寿命的关键.
研究的目的:
- 为了研究压载物颗粒角度对侧面阻力和降解的影响.
- 使用离散元件方法 (DEM) 验证模拟框架,使用现实的压载体几何形状.
- 为优化铁路工程中的压载物选择和维护提供数据驱动的见解.
主要方法:
- 使用3D扫描 (Artec Space Spider) 来捕获现实的压载粒子几何形状.
- 在PFC3D中使用离散元件方法 (DEM) 模拟来模拟压载物行为.
- 在横向负载下使用B70混凝土卧床进行模拟单条领带推力测试.
主要成果:
- 模拟结果显示,与实验数据对横向力位移行为的高度一致.
- 更多的角质压载物颗粒表现出较低的降解 (压载物断裂指数,断裂比率).
- 增加压载器角度与较高的横向阻力相关,通过回归分析验证.
结论:
- 压载物颗粒的角度是提高横向阻力和最大限度地降低铁路轨道床的退化的一个关键因素.
- 经过验证的DEM模拟框架为分析压载物行为提供了可靠的工具.
- 研究结果支持改善铁路基础设施的压载物选择和维护策略.
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