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

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

doi:10.2514/6.2016-1574

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 proceeding › Conference Contribution (Conference Proceeding)

3 Citations (Scopus)

326 Downloads (Pure)

Abstract

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 language	English
Title of host publication	15th Dynamics Specialists Conference
Subtitle of host publication	AIAA SciTech Forum
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages	27
ISBN (Electronic)	9781624103988
DOIs	https://doi.org/10.2514/6.2016-1574
Publication status	Published - Jan 2017

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10.2514/6.2016-1574Licence: CC BY-NC

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via AAIA at http://arc.aiaa.org/doi/10.2514/6.2016-1574 . Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 2.35 MBLicence: CC BY-NC

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@inproceedings{6e80684f32e14c52ad731067f8810500,

title = "Nonlinear negative stiffness wing-tip spring device for gust loads alleviation",

abstract = "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.",

author = "Andrea Castrichini and Cooper, {Jonathan E} and T Wilson and Alex Carrella and Yves Lemmens",

year = "2017",

month = jan,

doi = "10.2514/6.2016-1574",

language = "English",

booktitle = "15th Dynamics Specialists Conference",

publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",

address = "United States",

}

Nonlinear negative stiffness wing-tip spring device for gust loads alleviation. / Castrichini, Andrea; Cooper, Jonathan E; Wilson, T et al.
15th Dynamics Specialists Conference: AIAA SciTech Forum. American Institute of Aeronautics and Astronautics Inc. (AIAA), 2017.

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

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AU - Cooper, Jonathan E

AU - Wilson, T

AU - Carrella, Alex

AU - Lemmens, Yves

PY - 2017/1

Y1 - 2017/1

N2 - 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.

AB - 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.

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U2 - 10.2514/6.2016-1574

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M3 - Conference Contribution (Conference Proceeding)

BT - 15th Dynamics Specialists Conference

PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)

ER -

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

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

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