Experimental and numerical simulation of shock wave propagation in plateau tunnels
In order to study the influence of the plateau effect on the propagation pattern of the explosive shock wave in the trench,the explosion test outside the tunnel mouth of the 4 500 m plateau range was carried out.Based on the correlation formula of atmospheric pressure,air density,internal energy and altitude proposed by the theory of aeronomy,the numerical calculation model of the pit under the conditions of sea level,altitude of 1 000 m,2 500 m and 4 500 m was established,and the validity of the numerical simulation was verified through the comparison of experimental data and simulation results.We investigated the effect of altitude conditions on the overpressure parameters of shock waves in the trench.The results show that with the increase of altitude,the peak overpressure of the shock wave at the same measurement point in the pit decreases,the positive pressure impulse of the shock wave decreases,and the duration of overpressure increases.Based on the above calculation results,a preliminary method for predicting the overpressure and impulse of shock waves in the trench was established.
万方数据
维普
