Characterization of the Acoustic Radiation Properties of Laminated and Sandwich Composite Panels in Thermal Environment

7th National Conference on Processing and Characterization of Materials

Sharma, Nitin^1 ; Mahapatra, Trupti Ranjan^2 ; Panda, Subrata Kumar^3 ; Sahu, Pruthwiraj^1

KIIT (Deemed to Be University), Bhubaneswar Odisha

751024, India^1

Department of Production Engineering, Veer Surendra Sai University of Technology (VSSUT), Burla , Odisha

768018, India^2

Department of Mechanical Engineering, NIT, Rourkela, Odisha

769008, India^3

关键词: Acoustic characteristic;    ANSYS parametric design language;    Buckling temperature;    Finite element simulations;    Free vibration response;    Indirect boundary elements;    Sandwich composite panels;    Sound radiation properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012031/pdf
DOI  :  10.1088/1757-899X/338/1/012031

来源: IOP

【 摘 要 】

In this article, the acoustic radiation characteristics of laminated and sandwich composite spherical panels subjected to harmonic point excitation under thermal environment are investigated. The finite element (FE) simulation model of the vibrating panel structure is developed in ANSYS using ANSYS parametric design language (APDL) code. Initially, the critical buckling temperatures of the considered structures are obtained and the temperature loads are assorted accordingly. Then, the modal analysis of the thermally stressed panels is performed and the thermo-elastic free vibration responses so obtained are validated with the benchmark solutions. Subsequently, an indirect boundary element (BE) method is utilized to conduct a coupled FE-BE analysis to compute the sound radiation properties of panel structure. The agreement of the present sound power responses with the existing results available in the published literature establishes the validity of the proposed scheme. Finally, the current standardised scheme is extended to solve several numerical examples to bring out the influence of various parameters on the thermo-acoustic characteristics of laminated composite panels.