Intergrid Transformation

The transfer of forces from the fluid to the structural mesh, and deflections back again, is a crucial part of an aeroelastic simulation. When the structural model is defined on a simplified geometry (which can be perfectly acceptable when presenting the structural dynamics) the mismatch with the fluid surface grid can give spurious dynamics arising from the transfer method. A method called Constant Volume Tetrahedron (CVT) has been developed and demonstrated to effect the transfer in a simple way that also avoids spurious dynamics.

The method has been extended and used by the following groups:

Publications

  1. Goura, G.S.L., Time Marching Analysis of Flutter Using Computational Fluid Dynamics. University of Glasgow, PhD Thesis 2001.
  2. Goura, G.S.L, Badcock, K.J., Woodgate, M.A. , Richards, B.E., A data exchange method for fluid-structure interaction problems, Aeronautical Journal, April, 2001, 15-221.
  3. Goura, G.S.L., Badcock, K.J., Woodgate, M.A., Richards, B.E., Implicit method for the time marching analysis of flutter, Aeronautical Journal, April, 2001, 199-214.
  4. Badcock, K.J., Rampurawala, A.M. and Richards, B.E., Intergrid Transformation for Aircraft Aeroelastic Simulations, AIAA Journal, Volume 42, Issue 9, pp. 1936-1932, 2005.
  5. Goura, G.S.L., Badcock, K.J., Woodgate, M.A. and Richards, B.E., Extrapolation Effects on Coupled Extrapolation Effects on Coupled Computational Structural Dynamics Simulations, AIAA Journal, 41(2), 321-312-313, 2003.
  6. Woodgate, M.A., Badcock, K.J., Rampurawala, A.M., Richards, B.E., Nardini, D. and Henshaw, M.J., Aeroelastic Calculations for the Hawk Aircraft Using the Euler Equations, Journal of Aircraft, Vol 42, No 4, pp 1005-1012, 2005.
  7. A.M. Rampurawala. Aeroelastic analysis of aircraft with control surfaces using CFD. University of Glasgow, PhD Thesis, 2006

CVT Tetrahedron

Hawk Trainer Aircraft Mode Shape

 

Contact: Ken Badcock