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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (S1): 721544-721544.doi: 10.7527/S1000-6893.2017.721544

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Modelling of geometrically nonlinear structure of large flexible wing based on CR theory

WANG Wei, DUAN Zhuoyi, GENG Jianzhong, ZHANG Jian, LI Junfu   

  1. AVIC the First Aircraft Institute, Xi'an 710089, China
  • Received:2017-05-25 Revised:2017-07-04 Online:2017-11-30 Published:2017-07-04
  • Supported by:

    Provincial/Ministerial Level Project

Abstract:

The large flexible wing under aerodynamic loading is subject to distinct large deformation. Therefore, the assumption of small deformation according to the classical linear theory no longer holds, and structural modeling of such wing should consider the geometrically nonlinear effect. Based on Co-Rotational (CR) theory, the geometrically nonlinear large deformation is resolved into rotation and translation of the rigid body and elastic deformation described in the local coordination system. The structural model for description of the geometrically nonlinear deformation of the large flexible wing is constructed in this paper. With the large flexible camber beam as an example, the geometric nonlinear large deformation under the moment load is studied using the increment iterated method. The static method is validated, and the effect of geometrical nonlinear deformation due to coupling load is discussed. The geometrical nonlinear large deformation of a solar Unmanned Aerial Vehicle (UAV) with the layout similar to "Helios" is also studied.

Key words: large flexible, geometrically nonlinear, CR theory, statics, large deformation

CLC Number: