Nonlinear vibration analysis of a pyramid lattice sandwich plate in subsonic airflow

• Autores: Zhiwei Cao Guo Yao, Lisha Zhu
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 51, Nº. 9, 2023, págs. 4912-4928
• Idioma: inglés
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• Resumen

  • The lattice sandwich structure is a new type of artificial structure developed in recent years. It is light in weight and rigid in stiffness, which is naturally suitable for the aviation engineering. This article deals with the subsonic aerodynamic stability and nonlinear forced vibration properties of this particular structure, which exactly describes the application of this structure as the outer surfaces of the aircraft. In this article, the coupled equation of motion of the lattice sandwich plate interacting with subsonic external airflow is established based on the nonlinear plate theory and the linear potential flow theory. The stability of the system is analyzed by monitoring the variations of the natural frequencies of the system with different flow velocities. The steady state responses of the structure are analyzed by using the incremental harmonic balance method. The effects of the design parameters of the lattice sandwich plate on the nonlinear responses of the system are discussed. Based on the theoretical and numerical analysis, some suggestions for the optimal design of the lattice sandwich plate in aerodynamic environment are proposed.