【作者】 赵子豪； 刘璐璐； 潘波； 罗刚； 陈伟；

【Author】 ZHAO Zi-hao;LIU Lu-lu;PAN Bo;LUO Gang;CHEN Wei;College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics;Army Aviation Institute;State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics and Astronautics;

【机构】 南京航空航天大学能源与动力学院； 陆军航空兵研究所； 南京航空航天大学,机械结构力学及控制国家重点实验室；

【摘要】 本文针对涡轴发动机进气防护网会受到鸟冲击的问题进行了基础研究,作者基于LS-DYNA有限元计算软件,分别采用SPH(光滑质点流体动力学)方法和传统拉格朗日法建立了有限元计算模型,进行了数值模拟研究,分析了两种方法的优劣并对比了防护网钢丝直径、钢丝间距和鸟体撞击角度对防护网损坏情况的影响。研究表明:传统拉格朗日法建模更适用于这类问题;增加钢丝直径可以有效提高防撞效果,缩短钢丝间距则没有效果;鸟体斜撞击相比垂直撞击造成的损伤面积更大。更多还原

【Abstract】 This paper conducts a basic research on the problem that the protection net of turboshaft engine inlet will be impacted by birds. Based on the LS-DYNA finite element calculation software,the author uses the SPH(Smooth Particle Hydrodynamics) method and the traditional Lagrange method to establish the finite element model, numerical simulation research was carried out, the pros and cons of the two methods were analyzed, and the influence of the diameter of the wire diameter, the distance between the wires and the impact angle on the damage of the protective net was compared. Studies have shown that traditional Lagrange modeling is more suitable for this type of problem; increasing the diameter of the wire can effectively improve the anti-collision effect,while shortening the distance between the wires is not effective; the oblique impact of the bird body causes a larger damage area than the vertical impact.更多还原