Nonlinear negative stiffness wing-tip spring device for gust loads alleviation

Andrea Castrichini, Jonathan E Cooper, T Wilson, Alex Carrella, Yves Lemmens

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

3 Citations (Scopus)
288 Downloads (Pure)


A recent consideration in aircraft design is the use of folding wing-tips with the aim of enabling higher aspect ratio configurations with less induced drag whilst also meeting airport gate limitations. This study builds on previous work investigating the effect of exploiting the folding wing-tips in-flight as a device to reduce dynamic gust loads, but now with the introduction of a passive nonlinear negative stiffness hinge spring. A single degree of freedom model and a representative civil jet aircraft aeroelastic model were used to investigate the dynamic gust response for different hinge device designs. It was found that significant reductions in the dynamic loads were possible.
Original languageEnglish
Title of host publication15th Dynamics Specialists Conference
Subtitle of host publicationAIAA SciTech Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages27
ISBN (Electronic)9781624103988
Publication statusPublished - Jan 2017

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