飞机壁板结构战伤的动力有限元仿真

根据已有实验方案分别建立了离散杆和射弹高速冲击飞机壁板结构的有限元模型,利用显式动力有限元计算程序进行了冲击损伤仿真。仿真得到的壁板损伤模式及尺寸结果与相应实验结果比较吻合,验证了仿真选用的Johnson-cook材料本构模型和Gruneison状态方程参数以及侵蚀接触算法的可靠性。

Dynamic Finite-element Simulation on Aircraft Panel Structure Battle Damage

The finite-element simulation models of the discrete rod and the projectile impacting on the aircraft panel structure at high velocity are established according to some experiment projects.Based on the explicit dynamic finite-element program,the forming of impact damage in the panel structure is simulated.Through comparing the simulation results of damage pattern and size in the panel to the experiment results,the reliability of the Johnson-cook material models and Gruneison equations of state and Eroding contact algorithm used in the simulations is testified.