Tests for bird striking on a plate made of 45# steel under three kinds of different velocities were studied in detail by using dynamic data acquisition systems. The displacement-time history curves of three points and strain-time history curves of four points on the 45# steel plate were measured, and also, the time history curves of support reaction force along four striking directions were measured, at the same time, the whole processes of dynamic deformation and damage of the bird body and the plate were recorded using a high speed camera system. The good agreement of the results between two specimens in one group indicated that the test results are reliable. The dynamic response of the plate and the damage modes of the bird body influenced by striking velocity were analyzed. It was shown that the peak values of the displacement and support reaction force linearly enlarge with increase in striking velocity; the fluid features of the bird body are obvious with increase in striking velocity, so the bird body should be simulated using a fluid constitutive model under high velocity striking. The test results provided valuable data for establishing a bird body constitutive model, and abundant test data for a numerical simulation model applied in bird striking.%采用动态数据采集系统,对45#钢平板在不同撞击速度下的鸟撞动响应全过程进行了详细研究,得到了撞击过程中平板上三个点位移和四个点的应变、撞击方向4个支反力等物理量随时间变化历程,同时利用高速摄像系统记录了鸟撞过程中鸟体及平板动态变形的全过程.对重复试验的结果进行比较,二者良好的一致性表明试验结果的可靠性,在此基础上分析了平板动响应及鸟体破碎随撞击速度的变化规律.发现,位移及撞击支反力峰值随撞击速度的提高而线性增大；撞击速度越高,鸟体的流体特性越明显,表明高速撞击数值模拟中鸟体应采用描述流体行为的本构模型.该试验结果对建立合理的鸟体本构模型及验证鸟撞有限元计算方法具有重要意义.
展开▼
