| 高速铁路隧道长度对压缩波波前变形的影响研究 |
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| 引用本文： | 刘洪涛,梅元贵,刘坤.高速铁路隧道长度对压缩波波前变形的影响研究[J].现代隧道技术,2007,44(3):6-10. |
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| 作者姓名： | 刘洪涛 梅元贵 刘坤 |
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| 作者单位： | 兰州交通大学工业空气动力学研究中心,兰州,730070 |
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| 摘 要： | 依据一维可压缩非定常不等熵流动理论,以及黎曼变量特征线方法,在控制方程中计入瞬态摩擦项及传热项,对不同长度无碴隧道内压缩波波前变形进行数值模拟。与国外现场试验比较验证,表明本文计算方法和程序是正确的;在长隧道计算工况下,隧道长度对出口处压缩波的压力梯度影响明显,为进一步研究微压波强度提供依据。
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| 关 键 词： | 高速列车 压缩波 改进特征线法 瞬态摩擦 |
| 文章编号： | 1009-6582(2007)03-0006-05 |
Effect of high-speed railway tunnel length on distortion of the wavefront of compression wave |
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| Liu Hongtao,Mei Yuangui,Liu Kun.Effect of high-speed railway tunnel length on distortion of the wavefront of compression wave[J].Modern Tunnelling Technology,2007,44(3):6-10. |
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| Authors: | Liu Hongtao Mei Yuangui Liu Kun |
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| Abstract: | Based on one-dimensional unsteady compressible nonisentropic flow prediction and the method of characteristics for hyperbolic equations,accounting for the terms of transient friction and heat transfer in the flow equation,the paper carried out the numerical simulation of distortion of the wavefronts of compression waves in ballastless tunnels of different lengths.Comparison with the data of experiments for moving trains in foreign countries justified the proposed method and program of computation.The effect of tunnel length on the pressure gradient is obvious for the entrance,which offers the basis for further investigating the intensity of micro-pressure wave. |
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| Keywords: | High-speed train Compression wave Improved method of characteristics Transient friction |
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