In order to investigate the distribution law of pressure on the liner surface and the effect of initiation point parameter on the pressure distribution, the interaction of detonation waves with each other and with the liner is simulated by LS-DYNA software. The simulation results coincide well with the experimental data. The results of the study indicate that detonation waves collide with each other on the symmetry plane of the initiation points, and the pressure of collision position increases, which make the pressure distribution of liner uneven. While the distance between initiation points is bigger, the pressure of tip liner increases quickly,but the pressure of edge region of liner decreases gradually. When the distance is 50 mm,the pressure drops suddenly,namely the distance has a maximum value. The pressure of liner increases with the number of initiation point,but the increase rate reduces gradually, and the pressure distribution laws on the liner surface with different initiation numbers are similar. The conclusions can supply a theoretical basis for choosing appropriate initiation point parameters of the explosively formed projectile with star shaped tail.%为了掌握多点起爆下药型罩表面压力的分布规律以及起爆点参数对压力分布的影响,运用LS-DYNA 3D有限元软件,对多点起爆时爆轰波相互碰撞并作用于药型罩的过程进行数值仿真研究.仿真结果与实验结果吻合较好.研究结果表明:多点起爆时,爆轰波在起爆点的对称平面处发生碰撞,碰撞位置出现超压现象,导致作用于药型罩表面的爆轰载荷分布不均匀,爆轰波碰撞区域的压力高于非碰撞区域；随着起爆点间距的增大,爆轰波作用于药型罩顶部的压力逐渐增大,而边缘部位的压力则逐渐减小,当间距为50 mm时压力发生突降,即起爆点间距存在上限值；随着起爆点数的增加,药型罩表面微元的压力逐渐增大,但增加幅度逐渐减小,压力的总体分布规律相似.研究结果为带尾翼爆炸成形弹丸战斗部中起爆点参数等关键技术设计提供了理论依据.
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