列车交会时周围的流场特性分析与模拟  

Analysis and Simulation on the Characteristics of Flow Flied at Trains Crossing

作　　者：赵庆贤[1] 葛秀坤[1] 邵辉[1] 丁香香[1] 

机构地区：[1]常州大学环境与安全工程学院,常州讲师213164

出　　处：《城市轨道交通研究》2012年第11期75-78,82,共5页Urban Mass Transit

摘　　要：分析研究两列动车交会时周围的流场特性,对于减少列车交会过程的安全隐患非常重要。经过对列车交会时周围流场的模拟分析得出:其一,列车同向交会时其内侧压力较低,内外两侧会形成较大的压力差,列车的侧向力增加;其二,在列车反向交会过程中,车头相遇和车尾离开时,两列列车的阻力达到两个极大值点,升力在交会过程中先增加后减小,两列车并列瞬间升力值最大,侧向力在交会过程中不仅大小发生变化,而且还有一次方向的变化。所以,反向交会过程的安全隐患更多,应予足够重视。It is very important to reduce the hidden danger of trains meeting because of the circumambient flow flied characteristics, which are simulated and analyzed in this paper. The result shows： 1. when two trains run in the same direction and meet, the inner side pressure is lower, thus a greater pressure difference between the inside and the outside is formed, which will increase the lateral mo- ment of the train; 2. when two trains run in the opposite directions and meet, two trains＇ resistance achieves two maximum points at the time when their heads meet and when their rears leave, the lift-force first increases and then decreases, and a maximum value of the lift-force hap- pens when the trains run side by side. In such a case, the side-force value not only changes but also turns the direc- tion. So, there will be more risks when two trains cross in the opposite directions, more attention shall be give to this situation.

关 键 词：动车组 压力差 同向交会 反向交会 安全隐患 

分 类 号：U270.1[机械工程—车辆工程]