Mechanism and Shape Control of Variable Guide Frame to Inspect Inner Wall Tunnel

(Part 6, Numerical Analysis of Pressure Fluctuation Caused by Passing by Vehicles in Tunnel)

Abstract

To improve the inspection method in the inner wall of the tunnel that became superannuated, the mechanism that was flexibly transmutable of the guide frame shape for the inspection according to the object in the tunnel was developed. In part 5, numerical analysis was performed on the influence of pressure fluctuation caused by the movement of the vehicle on the guide frame as the vehicle passes through the tunnel. The pressure and flow around the vehicle and the guide frame were analyzed in the guide frame using the polymerization lattice of the inside of the tunnel and the moving vehicle. As a result, when the car passed through the guide frame, it was presumed that large pressure fluctuation propagated and vibration occurred.