高铁隧道内气动效应形成损坏痕迹特点分析

动车高速通过隧道时,运行车体推动的空气由于受到隧道壁的约束能形成能量很强的冲击气流,有时会造成一些设备设施损坏、脱落,进而危及高铁行车安全。这类事件发生后,铁路部门往往误以为是人为破坏,并以破坏案件进行上报。本文通过对特定动车行车事故的现场勘验、调查访问,分析了高铁隧道内气动效应对特殊位置设施造成损坏的过程及形成痕迹特点,准确认定了事件性质和事故发生原因,并对气动效应形成损坏痕迹和常见工具形成痕迹的区别进行了探讨。

Analysis into the Characteristic Damaged Marks Resulted from Aerodynamic Impact in High-speed-railway Tunnel

When a high-speed train rolls through a tunnel at high speed,the air driven by the galloping bulky train body can form an energy-intensive impacting airfl ow as a result of the restraint of the tunnel’s wall,causing occasional damages and falling off from the involved equipment and facilities,thereby endangering the safety of high-speed-railway operation.The occurrence of such incidents is often mistakenly believed of man-contrived,bringing forth a report of destruction case that was requested to probe into.Through a real case of its on-site probing and investigation of an incident involving a high-speed train,the process was here analyzed about how the high-speed-railway tunnel formed the aerodynamic impact to damage the location-special facilities and the characteristics of the resulted marks,thus having accurately identifi ed the reality of the incident and its causation.Furthermore,discussion was made into the difference between the marks caused by aerodynamic impact and the ones formed by common tools.