Thermal vibration response of typical thermal protection structural components based on thermal-acoustic-solid coupling

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (4) : 126-133.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Thermal vibration response of typical thermal protection structural components based on thermal-acoustic-solid coupling

WANG Kailun1，WANG Huyin2，GAO Pengxin2，QU Yegao*1

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Abstract

Thermal protection panels of high-speed aircraft exhibit complex dynamic responses such as thermal buckling and nonlinear thermoelastic vibrations under high-temperature and high-noise working conditions. This paper considers the contact of gaps in the thermal protection panels, establishes a finite element numerical model of the thermoelastic dynamics of the thermal protection panels, and uses a coupling method of thermal response and frequency domain linear perturbation analysis to analyze the random vibration response of the thermal protection panels. The impact of different connection methods on the modal analysis results and the simulation accuracy of the thermal vibration response performance of the thermal protection panels is studied. Through the vibration mode analysis of the numerical model, the accuracy of the model is verified by comparing with the modal test results. Subsequently, the thermal vibration response performance research and experimental research of the thermal protection panels under three different connection methods of constraint connection, connector connection, and surface contact connection are carried out. The research results show that the calculation results of the thermal vibration response of the thermal protection panels are consistent with the experimental measurement results, the maximum error between the root mean square value of the von Mises stress and the experimental measurement value is 5%, and the random response is consistent with the experimental results. This research provides an effective method for the analysis of the thermal vibration response performance of elastic panels with thermo-solid-acoustic coupling, and provides an effective reference for the prediction of the thermal vibration response performance of elastic panels.

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thermal protection panels / thermal-acoustic-solid coupling / thermal vibration response / finite element analysis

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WANG Kailun1, WANG Huyin2, GAO Pengxin2, QU Yegao1. Thermal vibration response of typical thermal protection structural components based on thermal-acoustic-solid coupling[J]. Journal of Vibration and Shock, 2025, 44(4): 126-133

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