A baffle assembly capable of improving bird impact resistance of an aircraft nose end frame is characterized in that five support beams with n-shaped cross sections and eight angle sheets with n-shaped cross sections in the baffle assembly are riveted on an aircraft end frame panel, and rivets are respectively fixed on an end frame main beam. And a baffle consisting of an upper panel made of 2024-T3 aluminum alloy, a lower panel made of 7075-T6 aluminum alloy and an aluminum foam core material is arranged on the upper surface of the supporting beam. According to the airplane nose, the reasonable sandwich structure plays a key role in bird strike resistance of the baffle, the bird strike resistance of the airplane nose is improved, the structural weight is reduced, and the manufacturing cost is reduced. A test sample proves that under the condition that 1.8 kg of bird body impacts at the speed of below 200m/s, the baffle effectively utilizes the energy absorption effect of a foamed aluminum stress platform section generated when aluminum foam bears a compression load, so that the acting force of bird body tissues is dispersed, the bird body tissues are prevented from penetrating through the lower panel, and the bird body is prevented from being damaged. And the structural weight is effectively reduced on the premise that the bird strike resistance is kept and the sufficient rigidity is achieved at the same time.

    一种能够提高飞机机头端框抗鸟撞性能的挡板组件,挡板组件中的五个横截面均为“几”字形的支撑梁和横截面均为“几”字形的八个角片均铆接在飞机端框面板上,并使各铆钉分别固定在端框主梁上。由2024‑T3铝合金制成的上面板、7075‑T6铝合金制成的下面板和铝泡沫芯材组成的挡板置于支撑梁的上表面。本发明中,合理的夹芯结构对挡板抗鸟撞性能起到关键作用,提高了飞机机头抗鸟撞性能,并减轻结构重量和降低制造成本。试样证明,在1.8kg鸟体以200m/s以下速度撞击情况下,挡板有效利用铝泡沫在承受压缩载荷时产生的泡沫铝应力平台段的吸能作用,使鸟体组织的作用力分散,阻止其穿透下面板,并且在保持抗鸟撞性能的同时拥有足够刚度的前提下有效降低了结构重量。


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    Title :

    Baffle assembly capable of improving bird strike resistance of aircraft nose end frame


    Additional title:

    一种能够提高飞机机头端框抗鸟撞性能的挡板组件


    Contributors:
    LI YULONG (author) / HUANG JIA (author) / LI RUOBAI (author)

    Publication date :

    2022-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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