Three Dimensional Numerical Analysis of Tunnel Inrushing Wave

高速列车冲进隧道时，在隧道入口周围产生压力波，称为隧道涌波。本研究的目的之一是分析隧道中心与铁路之间的偏移以及隧道入口周围的地形对波发射的影响。用CIP方法建立了一个三维计算机仿真分析系统。利用该系统计算了高速列车冲进隧道时排放的简单模型。该系统分为流体分析系统模拟列车冲进隧道，声学分析系统模拟涌浪发射。理论与仿真结果的距离衰减差异表明系统在守恒规则上存在问题。

When a high speed train inrushes a tunnel, pressure wave is emitted around the tunnel entrance as Tunnel Inrushing Wave. An objective of this research is to analysis influences on the emission of the wave by offset between the tunnel centre and rail way and by landform around the tunnel entrance. A three dimensional computer simulation system for analysis the objective was set up with CIP method. A simple model of emission by rush of high speed train into a tunnel was calculated by the system. The system split into fluid analysis system to simulate inrushing of train into tunnel and acoustic analysis system to simulate emission of inrushing wave. A difference of distance attenuation between a theory and results of simulation made clear that the systems have problems in conservation rule.