Dynamic response analysis of a thin-walled rectangular plate subjected to thermoacoustic loadings

• Autorzy: Dang Zhigao , Mao Zhaoyong

Identyfikatory

DOI

10.24425/ather.2020.132953

• Języki publikacji: EN

Abstrakty

EN

For thin-walled structures invariably exposed to thermal and noise environment, their dynamic response is an extreme concern in the design of the component of advanced hypersonic aircraft. To address the problem, three theoretical models are established with three typical graded thermal distributions considered. By introducing the thermal moment, membrane forces and acoustic loadings into the vibration equation of plate, the governing equation is derived and it is solved combined with boundary conditions of the plate, the modal function and velocity compatibility equations at the fluid-structure coupling surface. The accuracy of the theoretical predictions is checked against finite element results with good agreement achieved. The results show that not the physical parameters with variation of temperature but the thermal moments and membrane forces, cause the buckling phenomenon. It is noted that buckling phenomenon occurs not only in uniform temperature field but also in graded temperature distribution filed. The mechanism analysis about modal snap-through and losing phenomenon indicates that thermoacoustic loadings will affect the stiffness matrix and mass matrix of structure. With the increase of temperature, the lower modes of the plate are lost, the higher modes appear in advance, and the losing phenomenon occurs in accordance with the order.

Słowa kluczowe

EN

thermoacoustic loadings; buckling; dynamic response; modal snap-through; rectangular plate

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2020
• Tom: Vol. 41, no 1
• Strony: 151--174
• Opis fizyczny: Bibliogr. 27 poz., rys., tab., wykr., wz.

Twórcy

autor

Dang Zhigao

• School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, China

autor

Mao Zhaoyong

• School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, China

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