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Approach to Evaluate and to Compare Basic Structural Design Concepts of Landing Gears in Early Stage of Development Under Uncertainty

  • Roland PlatzEmail author
  • Benedict Götz
  • Tobias Melz
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Structural design concepts for load bearing mechanical systems vary due to individual usage requirements. Particularly strut-configurations for landing gears in airplanes push the envelope according to tight requirements in shock absorption, normal, lateral and torsional load capacity, rolling stability, storage dimensions, low drag, low weight, and maintenance as well as reliability, safety and availability. Since the first controlled and powered flight of the Wright-Brothers in 1903, design evolution generated different structural design concepts. Today’s structures may have, seemingly, reached mature conformity with distinct load path architectures that have been prevailed. In the proposed contribution, the authors evaluate and compare distinctive performance requirements like stroke ability and ride quality, elastic force retention, structure strength, and weight of mechanisms resulting from significant structural design concepts for main and nose landing gears. Loads in landing gears have always been distributed in struts with high and low amounts of strut members such as rods, beams, torque links, and joints as well as different types of absorbers. This paper’s goal is to clarify pros and cons of the four different concepts with respect to their vulnerability due to uncertainty. Here, uncertainty mainly occurs due to variations in elastic force retention and their effect on the performance requirements. For that, simple mathematical models are derived to evaluate and compare the most significant characteristics of the four concepts in the earliest stage of development in order to make early decisions for or against a concept before time and cost consuming detailed development work including manufacturing and test takes over.

Keywords

Landing gear Design concepts Early stage of development Decision making Uncertainty 

Notes

Acknowledgements

The authors like to thank the German Research Foundation DFG for funding this research within the SFB 805.

References

  1. 1.
    Barfield, N.A.: Fifty years of landing gear development: a survey of the pioneering contribution to aircraft undercarriage development made by Vickers and B.A.C. at Weybridge. Aircr. Eng. Aerosp. Technol. 40 (1), 17–22 (1968)Google Scholar
  2. 2.
    Bruhn, E.F.: Analysis and Design of Flight Vehicle Structures. Jacobs, Indianapolis (1973)Google Scholar
  3. 3.
    Chai, S.T., Mason, W.H.: Landing gear integration in aircraft conceptual design. Report MAD 96-09-01, Multidisciplinary Analysis and Design Center for Advanced Vehicles. Virginia Polytechnic Institute and State University, Blacksburg, 24061-0203 (1997)Google Scholar
  4. 4.
    Conway, H.G.: Landing Gear Design. Chapman and Hall, London (1958)Google Scholar
  5. 5.
    Currey, N.S.: Aircraft Landing Gear Design: Principles and Practices. AIAA Education Series. American Institute of Aeronautics and Astronautics, Washington (1988)CrossRefGoogle Scholar
  6. 6.
    Gudmundsson, S.: General Aviation Aircraft Design. Elsevier, Amsterdam (2014)Google Scholar
  7. 7.
    Hoare, R.G.: Aircraft landing gear: an account of recent developments in undercarriage design an the materials used. Aircr. Eng. Aerosp. Technol. 40 (1), 6–8 (1968)CrossRefGoogle Scholar
  8. 8.
    Niu, M.C.Y.: Airframe Structural Design. Conmilit Press Ltd., Burbank (1988)Google Scholar
  9. 9.
    Pragadheswaran, S.: Conceptual design and linear static analysis of nose landing gear. In: International Conference on Robotics, Automation, Control and Embedded Systems – RACE 2015, 18–20 February 2015. Hindustan University, Chennai (2015)Google Scholar
  10. 10.
    Veaux, J.: New design procedures applied to landing gear development. J. Aircr. 25 (10), 904–910 (2014)CrossRefGoogle Scholar
  11. 11.
    Wang, H., Xue, C.J., Jiang, W.T.: Fuzzy fatigue reliability analysis for a landing gear structure. In: 2010 Third International Joint Conference on Computational Science and Optimization (CSO), vol. 1, pp. 112–115 (2010). doi:10.1109/CSO.2010.130Google Scholar
  12. 12.
    Xue, C.J., Dai, J.H., Wei, T., Lui, B.: Structural optimization of a nose landing gear considering its fatigue life. J. Aircr. 49 (1), 225–236Google Scholar

Copyright information

© The Society for Experimental Mechanics, Inc. 2016

Authors and Affiliations

  1. 1.Fraunhofer Institute for Structural Durability and System Reliability LBFDarmstadtGermany
  2. 2.Technische Universität DarmstadtSystem Reliability and Machine Acoustics SzMDarmstadtGermany

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