紧固件连接平板结构抗鸟撞动态损伤试验研究
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1.中航西飞民用飞机有限责任公司;2.西北工业大学航空学院;3.江苏交盾检测技术有限公司;4.西北工业大学

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V215

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工信部渠道项目(MJZ1—11N22).


Experimental Study on the Dynamic Response and Damage of Fastener-Jointed Flat Plate Structures Subjected to Bird Strike
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1.AVIC XAC Civil Aircraft Co,Ltd,Xi’an;2.School of Aeronautics,Northwestern Polytechnical University,Xi’an;3.Jiangsu Jiaodun Testing Technology Co,Ltd

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    摘要:

    鸟撞是威胁航空飞行安全的重要因素,而紧固件连接部位作为结构的传力关键节点,其在冲击载荷下的失效行为直接影响飞行器的适航安全性。本文以铝合金平板与碳纤维增强热塑性复合材料(CCF800G/EC-PAEK2)平板为研究对象,设计了单排与双排高锁/沉头螺栓连接试件,利用空气炮发射速度为68.1 m/s的明胶鸟撞击试验。通过高速摄像系统记录了鸟弹流体化变形与结构破坏的全过程,并结合应变时程曲线分析了载荷传递路径。研究结果表明:单排连接呈现由撞击中心向边缘扩展的渐进式对称失效;而双排连接则由于受载初期的微小非对称性,诱发了剧烈的动力学载荷重分配与应力波叠加,最终呈现出单侧连锁式的突发连锁破坏。本文提炼了热塑性复材/金属混合连接结构在强冲击下的损伤演化规律,为航空平板连接结构的抗鸟撞容错设计与适航符合性验证提供了核心实验依据与理论支撑。

    Abstract:

    Aviation safety is critically threatened by bird strikes. Airworthiness and structural integrity are directly determined by the failure behavior of fastener joints under impact loading, as these joints serve as the key load-transfer nodes of aircraft structures. In this study, single-row and double-row joint specimens were designed and investigated. These specimens consisted of 7075-T6 aluminum alloy and CCF800G/EC-PAEK2 thermoplastic composite plates connected by hi-lok or countersunk bolts. Impact experiments were conducted by using an air gun to launch gelatin bird projectiles at a velocity of 68.1 m/s. The fluid-like deformation of the bird and the transient structural failure process were captured by high-speed cameras. Meanwhile, the load transfer paths were analyzed through dynamic strain histories. According to the results, single-row joints exhibit a progressive and symmetric failure mode that propagates outward from the impact center to the edges. In contrast, due to minor initial load asymmetries, double-row joints trigger intense dynamic load redistribution and stress wave superposition, ultimately resulting in a sudden, unilateral chain-reaction failure. This study extracts the damage evolution law of thermoplastic composite/metal hybrid joints under high-energy impact, providing critical experimental evidence and theoretical support for the fault-tolerant design against bird strikes and the airworthiness compliance verification of aeronautical fastened structures.

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王新年,许宇开,金安,等. 紧固件连接平板结构抗鸟撞动态损伤试验研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2026-05-22
  • 最后修改日期:2026-09-12
  • 录用日期:2026-09-23
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