Numerical Study on the Propagation Law of Shock Wave in Turning Tunnel

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Zhao, Beilei^1 ; Zhao, Jiguang^2 ; Cui, Cunyan^1 ; Wang, Yan^1

Department of Aerospace Science and Technology, Space Engineering University, Beijing

101416, China^1

Department of Electronic and Optical Engineering, Space Engineering University, Beijing

101416, China^2

关键词: Attenuation coefficient;    Equivalent diameter;    Overpressure;    Propagation process;    Protection designs;    Turbulent zones;    Turning angles;    Turning corner;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/3/032055/pdf
DOI  :  10.1088/1755-1315/237/3/032055

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

To study the propagation law of the shock wave in turning tunnel, the propagation process of shock wave in underground turning tunnels of 15°, 30°, 45°, 60°, 75° and 90° was simulated based on ANSYS/LS-DYNA. Results show that at the turning corner, the overpressure on the outside wall is 2 times that on the inside wall. According to the overpressure ratio criterion, the length of the turbulent zone is no more than 3.2 times the equivalent diameter of the tunnel. With the increase of the turning angle, the attenuation coefficient of shock wave decreases gradually, which indicates that the overpressure attenuation becomes less obvious. The results can provide an important reference for the protection design of the turning tunnel.