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Survey of aircraft structural dynamics non-linear problems and some recent solutions

  • J. L. Pérez (a1), L. H. Benítez, M. Oliver and H. Climent


Structural dynamics is a key discipline in aircraft design and certification. The realm of structural dynamics includes problems in which structure flexibility is important, such as dynamic loads (landing, taxi, gust, turbulence...), but it also includes other areas like environmental vibration or impacts technology. This is closely related with its sister discipline Aeroelasticity.

Linearity has been the cornerstone assumption in aircraft design engineering solutions. In the past, linearity allowed to solve many structural dynamics problems that otherwise would have been unaffordable. Nowadays, the necessity of highly optimised structures, combined to an increase of computer power, has made this assumption to be reconsidered.

This paper presents a wide survey on non-linear topics in structural dynamics and the way they have been solved at EADS-CASA (Airbus military) in the past 25 years. Although the paper has been mainly focused on numerical simulation using the Finite Element Method technique, component tests and full aircraft tests are also presented.


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7. Palacios, R., Climent, H., Karlsson, A. and Winzell, B. Assessment of Strategies for Correcting Linear Unsteady Aerodynamics using CFD or Test Results. International Forum of Aeroelasticity and Structural Dynamics 2001. Madrid, Spain, 5-7 June, 2001.
8. Oliver, M., Climent, H. and Rosich, F. Non-linear Effects of Applied Loads and Large Deformations on Aircraft Normal Modes. RTO Meeting Proceedings 36. Structural Aspects of Flexible aircraft Control. Chapter 21. Papers presented at the Specialists’ Meeting of the RTO Applied Vehicle Technology Panel (AVT) held in Otawa, Canada, 18-20 October 1999.
9. Oliver, M., Rodriguez Ahlquist, J., Martinez Carreño, J. AND Climent, H. A400M GVT: the challenge of nonlinear modes in very large GVT’s. International Forum of Aeroelasticity and Structural Dynamics 2009, Seattle, USA, 20-25 June 2009.
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16. Ramos, J. and Kamoulakos, A. ESI Report describing Development of SPH/Lagrangian Bird Model, CRAVHI Deliverable D1.4.2. October 2002.
17. Pérez-Galán, J.L. and Climent, H. EADS-CASA, Final Report on HTP Stochastic Impact/Crash Simulation using ST-ORM with Monte Carlo Simulation Method, CRAVHI Deliverable D3.3.1 February 2004.
18. Pérez-Galán, J.L., Strömberg, A.M. and Climent, H. Stochastic Approach to Bird Strike Numerical Simulation. International Forum of Aeroelasticity and Structural Dynamics 2005. Munich, Germany. 28 June – 1 July 2005.
19. Beltrán, F., Rueda, F. and Climent, H. EADS-CASA NT-J-ADD-01006, EF-2000. Production A/C. Bird strike analysis of wing slats, July 2001.
20. Ibáñez, P., Benítez, L. and Climent, H. EADS-CASA NT-A4-AA0-08004, A400M: Bird impact on the HTP leading edge. Numerical simulations, sensitivity analyses and suggested structural improvements, June 2008.
21. Ibáñez, P. Benítez, L., Pérez-Galán, J.L. and Climent, H. EADS-CASA NT-A4-AA0-07016 issue B, A400M: Bird Impact on the Nacelle Centre Upper Cowl. Deterministic and Stochastic Numerical Simulations, August 2008.
22. Pérez-Galán, J.L. and Climent, H. EADS-CASA, Assessment Report on the use of Stochastic Techniques for HVI Simulations applied to complex metallic and composite aeronautical structures, CRAHVI deliverable D.6.1.2, April 2004.
23. Rueda, F., Correal, A., De Castro, A., Benitez, L. and Climent, H. A new Approach for the Wheels-Up Landing Analysis and Certification of the A400M, EuroPAM 2008. The 17th European Conference and Exhibition on Simulation-Based Design, Prague, Czech Republic, 29-30 May 2008.
24. Benitez, L., Climent, H., Rueda, F. and Ibáñez, P. New approach for Crashworthiness of Aircraft Wheels Up Landing. 6th International KRASH User’s Seminar (IKUS6), Stuttgart, Germany. 15-17 June 2009.
25. Benitez, L., Climent, H., Rueda, F. and Pérez de la Serna, A. Impact Loads in Aircraft Wheels Up Landing. International Forum of Aeroelasticity and Structural Dynamics 2009, Seattle, USA. 20-25 June 2009.
26. Climent, H., Benitez, L., Rosich, F., Rueda, F. and Pentecote, N. Aircraft Ditching Numerical Simulation. 25th Congress of International Council of the aeronautical Sciences ICAS 2006. Hamburg, Germany, 3-8 September 2006.
27. Wernsdorfer, T., Keller, K. and Climent, H. EADS-CASA NT-3-AA0-04004, CN-235-300M Deepwater Ditching Tests Evaluation Report, March 2005.
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29. Triviño, V., Pérez-Galán, J.L. and Climent, H. Ice impacts on Aeronautical Structures, International Forum of Aeroelasticity and Structural Dynamics 2007, Stockholm, Sweden, 18 – 20 June 2007.
30. Benítez, L. and Climent, H. EADS-CASA NT-T-AA0-07005 Parametric Vulnerability Studies of Fluid Filled CFRP Structures, April 2007.

Survey of aircraft structural dynamics non-linear problems and some recent solutions

  • J. L. Pérez (a1), L. H. Benítez, M. Oliver and H. Climent


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