非轴对称装药对杆式射流初速影响的数值仿真

为了增加杆式射流的威力,采用LS-DYNA研究了非轴对称装药对杆式射流初速的影响规律,并提出用装药的非轴对称度表征非轴对称装药。通过分析可知:长轴起爆半径对爆轰波波形和压力的影响较大,长轴装药半径则决定了长轴起爆半径的选择范围。随着长轴起爆半径的增加,爆轰波的相互作用区域增大,压力峰值提高。得到了起爆半径非轴对称度对杆式射流初速的影响规律:随着起爆半径非轴对称度的增加,杆式射流的初速开始增加较快,后来增加变慢。所研究的非轴对称杆式射流头部初速最高可以达到3510m/s。

Numerical Simulation on Influence of Axial Asymmetric Charge on Initial Velocity of Rod-like Jet

With the aim to enhance the power of rod-like jet,LS-DYNA is adopted to research the law of axial asymmetric charge influence on rod-like jet initial velocity,and the method of charactering the charge with axial asymmetric degree is put forward.The research shows that long axis initiation radius affects detonation wave shape and pressure much,long axis charge radius determines the change range of initiation radius.According to the increase of long axis initiation radius,interaction region of detonation wave is enlarged,and peak pressure is increased.The law of initiation radius axial asymmetric degree influence on rod-like jet initial velocity is obtained: according to the increase of axial asymmetric degree,the initial velocity is improved faster at first,and then improved slower.Initial head velocity of rod-like jet can reach 3510m/s.