Aeroelastic Properties of Sandwich Beam with Pyramidal Lattice Core Considering Geometric Nonlinearity in the Supersonic Airflow
The equation of motion of sandwich beam with pyramidal lattice core in the supersonic flow considering geometric nonlinearity is formulated using Hamilton’s principle. The piston theory is used to evaluate aerodynamic pressure. The structural aeroelastic properties are analyzed using frequency- and time-domain methods, and some interesting phenomena are observed. It is noted that the flutter of sandwich beam occurs under the coupling effect of low order modes. The critical flutter aerodynamic pressure of the sandwich beam is higher than that of the isotropic beam with the same weight, length and width. The influence of inclination angle of core truss on flutter characteristic is analyzed.
Key Wordssandwich beam pyramidal lattice core geometric nonlinearity aeroelastic flutter supersonic flow
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- 3.Hoffmann, F., Lu, T.J. and Hodson, H.P., Heat Transfer Performance of Kagome Structures, Paper HX07, 8th UK National Heat Transfer Conference, Oxford, 9–10 September, 2003.Google Scholar
- 4.Kim, T., Fluid-Flow and Heat-Transfer in a Lattice-Frame Material. PhD Thesis, Department of Engineering, University of Cambridge, 2003.Google Scholar
- 13.Chattopadhyay, A., Kim, J.S. and Liu, Q., Aeromechanical stability analysis and control of smart composite rotor blades. Journal of Vibration and Control, 2002, 8: 847–860.Google Scholar
- 14.Ghoman, S.S. and Azzouz, M.S., Supersonic aerothermoelastic nonlinear flutter study of curved panels: time domain. Journal of Aircraft, 2012, 49(4): 1179–1183.Google Scholar