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Acta Mechanica Solida Sinica

, Volume 28, Issue 6, pp 639–646 | Cite as

Aeroelastic Properties of Sandwich Beam with Pyramidal Lattice Core Considering Geometric Nonlinearity in the Supersonic Airflow

  • Fengming Li
  • Zhiguang Song
  • Chunchun Sun
Article

Abstract

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 Words

sandwich beam pyramidal lattice core geometric nonlinearity aeroelastic flutter supersonic flow 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2015

Authors and Affiliations

  1. 1.College of Mechanical EngineeringBeijing University of TechnologyBeijingChina
  2. 2.School of AstronauticsHarbin Institute of TechnologyHarbinChina
  3. 3.Hong Du Aviation Industry GroupNanchangChina

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