Bird strike simulation on sandwich composite structure of aircraft radome
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摘要: 运用非线性动力学有限元软件PAM-CRASH对鸟撞击蜂窝夹芯结构雷达罩的过程进行了数值分析。在有限元建模中对材料模型的选取做了详细的讨论。根据适航标准,使用1.80 kg的鸟体进行鸟撞分析。在不考虑材料应变率强化作用的情况下,计算了鸟体对结构上21个不同位置的撞击,给出了雷达罩结构吸收冲击能量随撞击位置的变化规律。对玻璃纤维面板材料的应变率强化作用进行讨论,对比分析了应变率强化作用对计算结果的影响,数值模拟结果可为雷达罩鸟撞实验提供参考。Abstract: A methodology for the numerical simulation of bird strike on a nose radome structure of an aircraft is presented. The simulation technique is based on a non-linear dynamic finite element analysis and is performed in two steps. The first step deals with the choice of suitable material models capable of representing the behaviors of the material systems used in the impact process. The second step deals with the numerical simulation of bird strike on aircraft radome structure. The influence on the numerical results of the critical modeling issues such as the mesh density, the substitute bird flexibility and contact interfaces parameters are discussed briefly, and the of strain rate effect of material is presented by comparing the calculations. Then, the analytical method is employed to predict the amount of energy absorbed by the radome structure. As the impact location varys, the tendency of the energy absorbed by the structure is given.
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Key words:
- solid mechanics /
- impact energy /
- finite element analysis /
- radome /
- bird strike
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