Energy absorption characteristics of energy⁃absorbing elements of civil aircraft flap crosslinking mechanism
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摘要:
采用有限元分析与冲击试验相结合的方式对膨胀管与波纹管的吸能特性进行探究：通过数值仿真分析对吸能元件的试验过程进行初步掌握，同时根据冲击试验结果对试验设计的不合理之处进行修正；然后开展两种吸能元件的动态冲击试验，探究其吸能特性，最终比较分析有限元仿真分析与落锤冲击试验的试验结果，选择效果理想的吸能元件应用到襟翼交联机构上。结果表明：无论是从吸能行程、吸能稳定性还是吸能结构的设计考虑，波纹管都是最适合应用到交联机构中的吸能元件，该吸能元件比吸能大，吸能过程平缓稳定，吸收能量之后只有塑性形变但结构不发生破坏，同时吸能行程短，吸能结构简单，便于安装拆卸。
Abstract:The energy absorption characteristics of expansion tube and bellows were explored by combining finite element analysis and impact test：the test process of energy⁃absorbing element was preliminarily mastered through numerical simulation analysis，and the irrationality of test design was corrected according to the impact test results；then the dynamic impact test of two kinds of energy⁃absorbing elements was carried out to explore their energy absorption characteristics.Finally，the test results of finite element simulation analysis and dropping⁃hammer impact test were compared and analyzed to select the energy⁃absorbing element with ideal effect to be applied to the flap crosslinking mechanism.The results showed that the bellows were the most suitable energy absorbing element for interconnecting strut，irrespective of considering the energy absorbing stroke，energy absorbing stability or the design of energy absorbing structure.The specific energy absorption of bellows was large.The energy absorption process was gentle and stable.There was only plastic deformation after absorbing energy and the structure was not damaged.Besides，the energy absorption stroke of bellows was short and the energy absorption structure was simple，making it convenient for installation and disassembly.
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图 8 高速摄像机下的膨胀管准静态压缩试验
Figure 8. Quasi⁃static compression test of expansion tube with high speed camera
图 9 准静态压缩试验后的吸能元件
Figure 9. Energy absorbing element after quasi⁃static compression test
图 13 波纹管和膨胀管的试验装配示意图
Figure 13. Schematic diagram of test assembly of bellows and expansion tube
图 14 高速摄像机下的波纹管与膨胀管动态冲击过程
Figure 14. Dynamic impact process of bellows and expansion tube with high speed camera
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