Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Vibro-acoustic characteristics of sigmoid functionally graded sandwich plates with temperature-dependent materials
https://orcid.org/0000-0003-3571-3310
Abstract The vibro-acoustic characteristics of the sandwich plate with temperature-dependent parameters in thermal environment is analyzed and discussed in the present study, in which the material properties of the sigmoid function-based functionally graded material (S-FGM) plate are assumed to vary according to the two-power law distributions of the volume fractions of the constituents. Based on the first-order shear deformation theory, the vibration and vibro-acoustic coupling control equations for S-FGM sandwich plates with simply supported edges are established. Here, the thermal stress induced by the temperature distribution along the thickness direction is involved. By Navier method and fluid-solid coupling conditions, the natural frequency and the sound transmission loss are obtained, which are compared with that computed by the finite element simulation to verify the accuracy of the theoretical results. The natural frequencies for several kinds of structures are compared, and the effects of the temperature variations on the vibration and the sound transmission loss are analyzed. Then the influences of the parameters including the gradient index, core thickness and the top panel thickness on the vibro-acoustic characteristics are investigated by the fundamental frequency and the sound transmission loss. The research results provide a theoretical basis for the optimal design of the sandwich structures.
Highlights The effects of the temperature variations on the mechanical and thermal properties of S-FGM sandwich structure are analyzed. The effects of the temperature variations on the free vibration in different structures are analyzed compared. In thermal environment the natural frequencies and STL are computed, and compared with the results of FEM. The effects of various parameter changes on the vibro-acoustic characteristics of S-FGM sandwich plate are discussed.
Vibro-acoustic characteristics of sigmoid functionally graded sandwich plates with temperature-dependent materials
https://orcid.org/0000-0003-3571-3310
Abstract The vibro-acoustic characteristics of the sandwich plate with temperature-dependent parameters in thermal environment is analyzed and discussed in the present study, in which the material properties of the sigmoid function-based functionally graded material (S-FGM) plate are assumed to vary according to the two-power law distributions of the volume fractions of the constituents. Based on the first-order shear deformation theory, the vibration and vibro-acoustic coupling control equations for S-FGM sandwich plates with simply supported edges are established. Here, the thermal stress induced by the temperature distribution along the thickness direction is involved. By Navier method and fluid-solid coupling conditions, the natural frequency and the sound transmission loss are obtained, which are compared with that computed by the finite element simulation to verify the accuracy of the theoretical results. The natural frequencies for several kinds of structures are compared, and the effects of the temperature variations on the vibration and the sound transmission loss are analyzed. Then the influences of the parameters including the gradient index, core thickness and the top panel thickness on the vibro-acoustic characteristics are investigated by the fundamental frequency and the sound transmission loss. The research results provide a theoretical basis for the optimal design of the sandwich structures.
Highlights The effects of the temperature variations on the mechanical and thermal properties of S-FGM sandwich structure are analyzed. The effects of the temperature variations on the free vibration in different structures are analyzed compared. In thermal environment the natural frequencies and STL are computed, and compared with the results of FEM. The effects of various parameter changes on the vibro-acoustic characteristics of S-FGM sandwich plate are discussed.
Vibro-acoustic characteristics of sigmoid functionally graded sandwich plates with temperature-dependent materials
https://orcid.org/0000-0003-3571-3310
Abstract The vibro-acoustic characteristics of the sandwich plate with temperature-dependent parameters in thermal environment is analyzed and discussed in the present study, in which the material properties of the sigmoid function-based functionally graded material (S-FGM) plate are assumed to vary according to the two-power law distributions of the volume fractions of the constituents. Based on the first-order shear deformation theory, the vibration and vibro-acoustic coupling control equations for S-FGM sandwich plates with simply supported edges are established. Here, the thermal stress induced by the temperature distribution along the thickness direction is involved. By Navier method and fluid-solid coupling conditions, the natural frequency and the sound transmission loss are obtained, which are compared with that computed by the finite element simulation to verify the accuracy of the theoretical results. The natural frequencies for several kinds of structures are compared, and the effects of the temperature variations on the vibration and the sound transmission loss are analyzed. Then the influences of the parameters including the gradient index, core thickness and the top panel thickness on the vibro-acoustic characteristics are investigated by the fundamental frequency and the sound transmission loss. The research results provide a theoretical basis for the optimal design of the sandwich structures.
Highlights The effects of the temperature variations on the mechanical and thermal properties of S-FGM sandwich structure are analyzed. The effects of the temperature variations on the free vibration in different structures are analyzed compared. In thermal environment the natural frequencies and STL are computed, and compared with the results of FEM. The effects of various parameter changes on the vibro-acoustic characteristics of S-FGM sandwich plate are discussed.
Vibro-acoustic characteristics of sigmoid functionally graded sandwich plates with temperature-dependent materials
Li, Fenglian (Autor:in) / Chen, Yuxin (Autor:in) / Lv, Mei (Autor:in)
Thin-Walled Structures ; 159
13.11.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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