Nonlinear Negative Stiffness Wingtip Spring Device for Gust Loads Alleviation

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

Research output: Contribution to journalArticle (Academic Journal)peer-review

40 Citations (Scopus)
320 Downloads (Pure)


A recent consideration in aircraft design is the use of folding wing-tips with the aim of having higher aspect ratio aircraft with less induced drag, but also meeting airport gate limitations. This study builds on previous work investigating the effect of exploiting 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
Pages (from-to)627-641
Number of pages15
JournalJournal of Aircraft
Issue number2
Early online date3 Nov 2016
Publication statusPublished - Mar 2017
Event15th Dynamics Specialists Conference, 2016 - San Diego, United States
Duration: 4 Jan 20168 Jan 2016

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