【摘要】 运用ANSYS/LS-DYNA3D程序模拟了水下钻孔爆破产生的冲击波传播过程,得到了地震动水压力和冲击波的波形曲线及压力数据,分析了其特性及传播规律,并利用Cole经验公式拟合模拟了取得的数据。结果表明,在与炮孔轴线夹角约45°范围内,地震动水压力与冲击波叠加使冲击波峰值压力随爆距增加单调减小,Cole经验公式对水下钻孔爆破产生的地震动水压力和冲击波的传播规律均具有良好的适应性。更多还原

【Abstract】 Using ANSYS/LS-DYNA3D software,shock wave of underwater drilling blasting is simulated numerically.Time histories of seismically hydrodynamic pressure and shock wave are obtained.Characteristics of hydrodynamic pressure and shock wave due to underwater drilling blasting are analyzed.Based on the Cole empirical formula,the relations between peak hydrodynamic pressure and blasting distance are fitting.The above results illustrate that seismically hydrodynamic pressure and shock wave are superposed in the range of 45 degree of the angle with respect to drilling axis,which causes that peak pressure of shock wave monotonously decreases with the increase of blasting distance.Cole empirical formula has a good agreement with the propagation rule of seismically hydrodynamic pressure and shock wave.更多还原