Damage Assessment Method of Aircraft Targets under Blast Wave
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摘要: 从飞机结构强度设计角度出发，研究了大当量爆炸冲击波作用下飞机目标毁伤效应评估方法。根据飞机结构强度设计准则，确定了典型飞机目标的失效判据。通过有限元分析，获得了典型飞机目标机翼在均布冲击波作用下完全失效的超压值，与试验数据对比表明，该方法具有较好的合理性。在此基础上，考虑动态加载下的结构响应，通过计算不同工况下飞机目标失效的超压值和相应的持续时间，获得了飞机失效的冲击波超压-冲量准则，为后继冲击波对飞机整体毁伤效应评估提供了更为合理的方法。Abstract: A new damage assessment method of aircraft targets under blast wave was studied based on the strength of aircraft structures. The failure criterion of typical aircraft targets was determined according to the strength design criterion of aircraft structure. Further, the critical blast wave overpressure causing the aircraft failure was obtained by the finite element analysis. It shows that the simulation results were consistent with the previous experimental results and the method was proved to be reasonable. Based on the method, the structural response under dynamic loading was further investigated. A series of blast wave overpressures and corresponding durations causing the aircraft failure were studied by the numerical simulations. Consequently, the overpressure-impulse damage criterion of typical aircraft target under blast wave was established. The results were considered to be a more reasonable method for assessing the aircraft overall damage effects under blast wave loading.
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Key words:
- blast shock wave /
- aircraft targets /
- structure strength design /
- damage criterion
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图 6 边界条件及加载条件示意图
Figure 6. Schematic of the boundary conditions and loading conditions
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