CAJ | 학술논문

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。
위료연구진실항공발동궤궤갑적포용성,대평판조협편이불동초시속도당격구형파판적침철궤리진행료수치방진연구。통과분석당격과정중협편가속도、속도、위이적변화,료해료여시험상부적당격、변형、시렬화실효과정。이용유효적수치모형험증료협편초시속도여잔여속도지간적관계만족Recht-Ipson공식,차공정중상용적파배세능법가용우초보예측잔여속도。
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.