Abstract:Due to the large pressure fluctuations caused by the high-speed train passing through the tunnel, the transient pressure changes transmit from the exterior to interior caused the problem of uncomfortable feelings of the passengers, which makes high-speed trains use airness body and pressure protection technology. It has significant to design the airtightness threshold under the premise of pressure comfort criteria of the train. Aiming at the characteristics of high-speed railway tunnel

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... lengths in mountainous areas of China, a large number of working conditions when the train pass through the tunnel are obtained under the premise of the method of generalized Riemann variables characteristics of one-dimensional, compressible, non-constant and unsteady flow model, and the effects of train-length, speed, tunnel length and tightness coefficient are summarized. The coupling analysis of the train-tunnel system is carried out and the most unfavorable tunnel length of internal pressure are proposed for different time interval criterial. According to the threshold requirements of different criteria of China, Germany, UIC and ERRI, the train air-tightness threshold is calculated, and the curve of the time constant threshold increasing with the tunnel length is fitted. The theoretical mathematical relationships between the air tightness threshold under four different standards are summarized and compared. Key words:mountain high-speed railway;high speed train;tunnel;pressure wave;air tightness threshold;comfort criteria 0 前言 * 截止 2018 年底,中国已投入运营的高速铁路总长 * 国家重点研发计划资助项目 (2016YFB1200506)。20191105 收到初稿, 20200305 收到修改稿 2.9 万 km,其中铁路隧道 15 117 座,总长 16 331 km。 仅长度不小于 10 km 的特长隧道就有 50 座,累计 长度约 640 km [1] 。 "隧线比高、特长隧道众多"是 我国山区高速铁路的典型特点。高速列车通过隧道 时诱发的压力波传递至车内也将影响司乘人员的耳 感舒适性。采用气密性车体很大程度上可以保证列 月 2020 年 6 月 梅元贵等:山区高速列车车体动态气密性阈值特征的数值模拟研究 197