平板条叶片侵彻靶板的动响应研究

Dynamic Response of Flat Blade Projectile Penetrate Plate

为了研究真实航空发动机机匣的包容性,对平板条叶片以不同初始速度撞击矩形靶板的侵彻机理进行了数值仿真研究。通过分析撞击过程中叶片加速度、速度、位移的变化,了解了与试验相符的撞击、变形、撕裂和失效过程。利用有效的数值模型验证了叶片初始速度与残余速度之间的关系满足Recht-Ipson公式,且工程中常用的破坏势能法可用于初步预测残余速度。

In order to study the real aircraft engine casing containment capability,the different blade projectiles impacting plates by different initial velocities were simulated numerically.The impact,deformation,penetration or perforation of the plates were studied by analyzing the changes of blade＇s acceleration,velocity and displacement during the penetration process.Taking advantage of an effective numerical model,it is proved that the relationship between initial velocity and residual velocity of the projectile meet the Recht-ipson formula.The damage potential energy method used in engineering can be used to predict residual velocity.