Vibration and acoustic response of rectangular sandwich plate under thermal environment

Article type: Research Article

Authors: Liu, Yuan | Li, Yueming

Affiliations: State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China

Note: [] Corresponding author: Yueming Li, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China. Tel.: +86 029 8266 8340; Fax: +86 029 8266 9044; E-mail: [email protected]

Abstract: In this paper, we focus on the vibration and acoustic response of a rectangular sandwich plate which is subjected to a concentrated harmonic force under thermal environment. The critical buckling temperature is obtained to decide the thermal load. The natural frequencies and modes as well as dynamic responses are acquired by using the analytical formulations based on equivalent non-classical theory, in which the effects of shear deformation and rotational inertia are taken into account. The rise of thermal load decreases the natural frequencies and moves response peaks to the low-frequency range. The specific features of sandwich plates with different formations are discussed subsequently. As the thickness ratio of facing to core increases, the natural frequencies are enlarged, and the response peaks float to the high-frequency region. Raising the Young's modulus of the core can cause the similar trends. The accuracy of the theoretical method is verified by comparing its results with those computed by the FEM/BEM.

Keywords: Vibration, acoustic response, thermal environment, sandwich plate

DOI: 10.3233/SAV-130801

Journal: Shock and Vibration, vol. 20, no. 5, pp. 1011-1030, 2013