The present paper deals with the vibration induced acoustic responses of baffled sandwich curved shell panels constituted of laminated composite face sheets and subjected to harmonic point excitation in an elevated thermal environment by an effective computational approach. A coupled finite-boundary elements formulation based on the higher-order shear deformation shell theory has been proposed and implemented via a domestic MATLAB code for the computation of the responses. The eigen frequencies in conjunction with the conforming modes of the vibrating thermally pre-stressed composite sandwich panel are obtained using competent finite element steps engaging the Hamilton’s principle. The critical buckling temperature of the sandwich panel structure is assessed to prevent any excess thermal loading during analysis followed by the computation of acoustic responses by solving the Helmholtz wave equation using the boundary element steps. The performance and the versatility of the present scheme is established by the convergence study and the successive comparison of the present numerical responses, for instance the critical buckling temperature and the radiated sound power, with the available benchmark solutions. The sound power emitted by thermally stressed composite sandwich panel is also computed via simulation model developed using commercial software ANSYS and LMS Virtual.Lab and compared with the present values. Numerous numerical examples are solved to deeply discuss the influence of various design parameters on the vibroacoustic responses of laminated composite sandwich curved panels under high temperature environment.

本文通过一种有效的计算方法，对由叠层复合面板构成的并在高温环境中受到谐波点激励的带隔板夹层弯曲壳体面板的振动引起的声学响应进行了研究。提出了一种基于高阶剪切变形壳理论的有限元耦合公式，并通过国内的MATLAB代码实现了响应的计算。使用符合汉密尔顿原理的有限元有限元步长，获得本征频率以及振动热预应力复合夹芯板的协调模式。评估夹层板结构的临界屈曲温度，以防止在分析过程中过大的热负荷，然后通过使用边界元步骤求解亥姆霍兹波方程来计算声学响应。本方案的性能和多功能性是通过对现有数值响应（例如临界屈曲温度和辐射声功率）的收敛性研究和相继比较以及可用的基准解决方案来确定的。还可以通过使用商业软件ANSYS和LMS Virtual.Lab开发的仿真模型来计算由热应力复合夹芯板发出的声功率，并将其与当前值进行比较。