摘要
研究目的:针对列车横截面积与隧道横截面积比值阻塞比的不同,分析计算长隧道内运行的高速列车在不同速度下,由于空气动力学效应引起的列车阻力及热量增加,综合考虑辅助设备发热及隧道壁面热传导导致的能量损失,合理预测不同阻塞比下高速列车运行引起的隧道内温度升高及隧道内温度随时间的变化,得出长隧道内由于高速列车运行引起的热、力效应。研究结论:通过计算与分析表明,列车高速运行导致隧道内阻力变化及热效应的大小,受到列车隧道系统阻塞比的影响比车速的影响更大,列车空调放热是隧道内温度升高的主要因素,壁面摩擦等因素也会导致隧道内热量的进一步增加,行车密度对温度的影响将是非常关键的。对于高阻塞比的列车隧道系统,隧道中部残留的热量还较多,热量积聚效应不容忽视。
Research purposes：According to the difference between the blockage ratios for the train cross-sectional area and the tunnel cross-sectional area,the analysis and calculation are made for the increases of train resistance and heat quantity caused by the aerodynamic effect when train runs through in a long tunnel at the different speeds,and the temperature rising and variations at the different times in tunnel caused by high-speed train running in tunnel are predicted rationally at the different blockage ratios on full consideration to the heat given out by auxiliary equipments and the heat loss during transmission on the wall face of tunnel for the purpose of knowing the thermal and mechanics effects of high-speed train running through a long tunnel.Research conclusions：The results of calculation and analysis show the resistance change and thermal effect caused by high-speed train running through a long tunnel are more influenced by blockage ratio than train speed.Heating from air conditioning system of train is the main factor for temperature rising in long tunnel.The friction of the tunnel wall can further increase the heating.The train density is a key link to the temperature in tunnel.In railway tunnel with high blockage ratio,there is much heat remained,and more attention should be paid to it.
出处
《铁道工程学报》
EI
北大核心
2010年第4期66-70,共5页
Journal of Railway Engineering Society
基金
国家自然科学基金(50678076)
甘肃省自然科学基金(0710RJZA050)
高等学校博士点专项科研基金(20080732002)
关键词
高速列车
长大隧道
热、力效应
温度升高
high-speed train
long tunnel
thermal and mechanics effect
temperature rising
