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高速列车通过隧道时所诱发的压力波不仅会使乘客耳感舒适性变差,而且会造成车辆零部件疲劳。基于计算流体力学软件中有限体积方法,本文使用重叠网格法模拟了复杂外形高速列车完全通过隧道时引起的隧道内的压力波动。描述了重叠网格法及使用该方法进行列车过隧道建模的过程。利用文献提供的数据,分别采用滑移网格法和重叠网格法建模计算,并进行对比。通过与京沪线高速列车实车试验数据的对比,结果表明:对于模拟高速列车隧道气动效应,重叠网格法不仅网格设计简单,对车体、隧道复杂外形适应性强,且计算结果具有较高的计算精度及可靠性,具有较高的工程价值,可为今后高速铁路隧道气动效应的相关研究提供参考。
The pressure waves induced by high-speed trains passing through the tunnel will not only make the comfort of passengers’ ears less accessible, but also cause fatigue of vehicle parts. Based on finite volume method in Computational Fluid Dynamics software, this paper simulates the pressure fluctuation in the tunnel caused by the complex shape high-speed train passing through the tunnel completely by using the overlap-grid method. An overlay grid method and the process of modeling the train over the tunnel using this method are described. Using the data provided in the literature, we use the sliding mesh method and the overlap mesh method respectively to calculate and compare them. The comparison between the experimental data and the experimental data of Beijing-Shanghai line high-speed train shows that: for simulating the aerodynamic effect of high-speed train tunnels, the overlapping grid method not only has simple grid design, but also has strong adaptability to complex shapes of vehicle body and tunnel, High computational accuracy and reliability, with high engineering value, can provide reference for future research on aerodynamic effects of high-speed railway tunnel.