台湾高速铁路隧道空气动力效应之量测—CJK3D—《隧道建设》2011年S1期

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5pD#R/e4M0【摘要】:为了验证隧道空气动力效应之理论现象,并证实设计阶段之数值模拟成果及风压标准,乃选定台湾高速铁路之2座长隧道,于隧道内布设气压计配合不同的位置、几个特定的列车速度进行实地测试。量测结果显示:高速铁路列车所引致空气动力效应之现象,大体上与先前研究文献及规划时期数值模拟之成果一致,车头进入、出隧道时会引发一个明显升高之压缩波,列车通过后(车尾进出洞口时)由于空气动力拖曳气流而压力骤降至形成张力波。不论正压或负压峰值,在车速达到220~230 km/h时,便可达1.0 kPa;当车速接近300 km/h时,实测得之最大压力值约1.35 kPa;所有现地实测之压力峰值尚低于设计规范之标准值。水利论文ef5?,^ MaW

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T*D,Z ZZ1x4?5pVP:?0隧道空气动力效应 高速铁路 现地量测 压力峰值

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P+s6E^I;L00引言日本与欧洲是最早发展高速铁路的国家,对于列车行经隧道所产生空气动力效应之研究已有相当多之论述。文献[1-2]以模型试验与数值分析,归纳得列车进入隧道口时,可概分为3阶段:1)列车进入隧道口。车头会推挤隧道内空气形成一压缩波(compression wave),以音速向列车前方传递水利论文cv dit_

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