DYB-3航空有机玻璃风挡鸟撞数值模拟

Numerical Simulation of DYB-3 Aviation Organic Glass Windshield under Bird Impact

运用LS-DYNA有限元软件模拟了鸟撞飞机风挡的过程,风挡模型采用Lagrange方法定义,建立4种鸟体力学模型,定义撞速为450~650km/h,撞击位置为风挡对称线前1/3点、中点、后1/3点.重点研究了不同鸟体力学模型、不同撞击点对风挡鸟撞响应的影响,并对比两种常见的风挡材料在鸟撞下的响应.结果表明:采用光滑粒子流体动力学(SPH)方法和自定义材料的鸟体模型可以模拟鸟体高速撞击风挡呈流体状飞溅的过程,并能准确预测风挡的鸟撞动态响应;风挡前部抵抗飞鸟撞击能力最强,中后部较弱.DYB-3航空有机玻璃风挡在鸟撞仿真中表现出较高的耐冲击性.

The process of the aircraft windshield under bird impact was simulated by using LS^DYNA fi- nite element software, the windshield model was defined by the Lagrange method, four bird mechanics model were established, the speed of bird was 450~650 km/h, and the impact position was first 1/3 point, middle point and back 1/3 point of the windshield symmetry line. There are mainly studied the different bird mechanical models, the effect of windshield respond under bird impact in different impact points and the comparison of two common windshield materials response under bird impact. The follow- ing conclusions are drawn： the bird model using the smoothed particle hydrodynamics （SPH）method and the custom material can simulate the process of splashing in a fluid form of the bird impacting on wind- shield at high speed, and can accurately predict the bird impact dynamic response of windshield; the front of the windshield against the bird-impact is strongest while the middle and the rear of the wind- shield is weaker; the DYB-3 aviation organic glass ulation of bird impact. windshield shows higher impact resistance in the sim-ulation of bird impact.