针对多光谱硫化锌（zinc sulfide，ZnS）光学玻璃材料用于飞行器时的鸟撞问题进行了研究。对多光谱硫化锌玻璃进行了中高应变率下的压缩试验获得其材料属性。鸟体采用光滑粒子流体动力学(smoothed particle hydrodynamics,SPH)方法建模，引入Gruneisen状态方程定义鸟体本构模型。对建立的鸟体模型进行撞击铝板的仿真并进行试验验证，验证结果表明建立的鸟体模型具有较高的精度，可以用于其它碰撞情景下的仿真。建立鸟撞玻璃平板的模型对多光谱硫化锌玻璃的耐鸟撞性能进行预测分析，仿真结果表明ZnS玻璃撞击部位和边缘约束的地方容易达到极限应变并发生失效；另外，随着鸟体撞击角度的减小玻璃表面的接触力峰值也逐渐减小。该研究所得结果可以为鸟体SPH方法的数值模拟以及多光谱硫化锌玻璃在飞行器上的应用提供参考。
Abstract
Here, the bird impact problem of multispectral zinc sulfide (ZnS) optical glass material used in aircraft was investigated. Firstly, dynamic compressive tests were conducted on multispectral ZnS glass at high-medium strain rate to obtain its material properties. Secondly, a bird body was modeled using the smoothed particle hydrodynamics (SPH) method, and Gruneisen state equation was introduced to define the bird body constitutive model. The established bird body model impacting aluminum plate was simulated and verified with tests. The verification results showed that the established bird body model has higher accuracy and can be used for simulation in other impact cases. Finally, a model of bird impact glass plate was established to predict the anti-bird impact performance of multispectral ZnS glass. Simulation results showed that the ultimate strain and failure of ZnS glass are easy to reach at impact position and place of edge constraint; contact force peak value of glass surface decreases with decrease in bird impact angle; the study results can provide a reference for numerical simulation of the bird body SPH method and application of multispectral ZnS glass in aircraft.
关键词
多光谱硫化锌(ZnS)；鸟撞；光滑粒子流体动力学(SPH)方法；数值计算 /
试验
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Key words
multispectral zinc sulfide (ZnS) /
bird impact /
smoothed particle hydrodynamics (SPH) method /
numerical simulation /
test
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