Analysis of aerodynamic loading properties on hood of high-speed railway tunnel

Summary When high-speed train passing through tunnel, aerodynamic effect will be created, which may arise micro-pressure wave at tunnel exit and affect the surrounding environment around tunnel. Setting hood at tunnel entrance is effective and economical method. Using numeral simulation method, two kinds of hood mechanics character under deadweight and aerodynamic load were analysed. The stress concentration field on the hood and the magnitude of the stress caused by aerodynamic loading was defined. By comparing the aerodynamic loading method of pseudo-static and dynamic real-time, the necessity for doing real-time dynamic analysis is shown. The recommended kind of hood also was point out.