MENG Xiangrui, LI Jianqiao, NING Jianguo, XU Xiangzhao. Numerical Simulation of Explosive Shock Wave Propagation in Imitation Bridge Structure[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 042301. doi: 10.11858/gywlxb.20180649
Citation:
HU Liangliang, HUANG Ruiyuan, LI Shichao, QIN Jian, WANG Jinxiang, RONG Guang. Shock Wave Simulation of Underwater Explosion[J]. Chinese Journal of High Pressure Physics, 2020, 34(1): 015102. doi: 10.11858/gywlxb.20190773
MENG Xiangrui, LI Jianqiao, NING Jianguo, XU Xiangzhao. Numerical Simulation of Explosive Shock Wave Propagation in Imitation Bridge Structure[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 042301. doi: 10.11858/gywlxb.20180649
Citation:
HU Liangliang, HUANG Ruiyuan, LI Shichao, QIN Jian, WANG Jinxiang, RONG Guang. Shock Wave Simulation of Underwater Explosion[J]. Chinese Journal of High Pressure Physics, 2020, 34(1): 015102. doi: 10.11858/gywlxb.20190773
The state equation of water, artificial viscosity coefficient and mesh size have a great influence on the numerical results of underwater explosion shock wave. In order to improve the simulation accuracy of underwater explosion shock wave, the peak pressure and specific impulse of the conventional TNT explosive underwater explosion are taken as the measurement indicators, and the influence of these factors on the numerical simulation results is studied. For the five kinds commonly state equations of water, the specific values of the artificial viscosity coefficients under different working conditions and appropriate grid size for different explosive equivalents are given. These parameters can provide reference for improving simulation accuracy of underwater explosion shock wave under different working conditions. First, through a series of simulations of the commonly used five kinds of state equations of water, the calculation results of peak pressure and specific impulse are compared with the empirical formula, and the error analysis is carried out to give the applicable scope of each state equation. Secondly, the influence of the artificial viscosity coefficient on the calculation results is discussed, and a series of calculations are carried out for the primary and secondary artificial viscosity coefficients under different working conditions. The recommended range of values for the primary and secondary artificial viscosity coefficients under different working conditions is given. Finally, through a series of calculations on 0.1, 0.5, 1, 10, 50, 100, 500 and 1 000 kg equivalent explosives and different grid sizes, the recommended mesh sizes corresponding to different explosive equivalents under the requirement of engineering calculation accuracy are obtained by limiting the relative error of peak pressure less than 10%. The expressions of the recommended mesh sizes corresponding to different explosive equivalents are also given.
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MENG Xiangrui, LI Jianqiao, NING Jianguo, XU Xiangzhao. Numerical Simulation of Explosive Shock Wave Propagation in Imitation Bridge Structure[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 042301. doi: 10.11858/gywlxb.20180649
MENG Xiangrui, LI Jianqiao, NING Jianguo, XU Xiangzhao. Numerical Simulation of Explosive Shock Wave Propagation in Imitation Bridge Structure[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 042301. doi: 10.11858/gywlxb.20180649