Two Degree-of-Freedom Dynamic Theoretical Model on Tile Thermal Protection System

被引:0
|
作者
Huang J. [1 ]
Yao W. [1 ,2 ]
Kong B. [1 ,3 ]
Yang J. [3 ]
Wang M. [3 ]
Zhang Q. [3 ]
机构
[1] Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing
[3] AVIC Chengdu Aircraft Design and Research Institute, Chengdu
来源
Trans. Nanjing Univ. Aero. Astro. | 2019年 / 1卷 / 139-145期
关键词
Acoustic excitation; Base excitation; Dynamic theoretical model; Thermal protection system;
D O I
10.16356/j.1005-1120.2019.01.013
中图分类号
学科分类号
摘要
In order to study the dynamic behaviors of the thermal protection system(TPS)and dynamic strength of the strain -isolation -pad(SIP), a two degree -of-freedom dynamic theoretical model is presented under the acoustic excitation and base excitation. The tile and SIP are both considered as the elastic body and simplified as a mass point, a linear spring and a damping element. The theoretical solutions are derived, and the reasonability of theoretical model is verified by comparing the theoretical results with the numerical results. Finally, the influences on the dynamic responses of TPS by the structural damping coefficient of TPS, elasticity modulus and thickness of SIP are analyzed. The results show that the material with higher damping, and SIP with thicker size and lower elastic modulus should be considered to reduce the dynamic responses and intensify the security of TPS. The researches provide a theoretical reference for studying the dynamic behaviors of TPS and the dynamic strength of SIP. Besides, the dynamic theoretical model can be used as a quick analysis tool for analyzing the dynamic responses of TPS during the initial design phase. © 2019, Editorial Department of Transactions of NUAA. All right reserved.
引用
收藏
页码:139 / 145
页数:6
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