基于热-固-声耦合的弹性壁板振动响应分析  

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

作　　者：王凯伦 王虎寅 高鹏新 瞿叶高 WANG Kailun;WANG Huyin;GAO Pengxin;QU Yegao(State Key Lab of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;Shenyang Aircraft Design&Research Institute,Aviation Industry Corporation of China Limited,Shenyang 110035,China)

机构地区：[1]上海交通大学机械系统与振动全国重点实验室,上海200240 [2]中国航空工业集团公司沈阳飞机设计研究所,沈阳110035

出　　处：《振动与冲击》2025年第4期126-133,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金重点项目(11932011)。

摘　　要：高速飞行器热防护壁板在高温、强噪声工作环境会表现出热屈曲、非线性热弹性振动等复杂动力学响应。考虑热防护壁板连接间隙接触,建立了热防护壁板热弹性动力学有限元数值模型,采用热响应与频域线性摄动分析叠加的耦合法对热防护壁板随机振动响应进行了分析,研究了不同连接方法对模态分析结果和热防护壁板的热振响应性能模拟精度的影响。通过数值模型的振动模态分析,与模态测试结果对比验证了模型的准确性。随后开展约束连接、连接器连接以及面接触连接三种不同的连接方式下热防护壁板的热振响应性能研究和试验研究。研究结果表明:热防护壁板的热振响应的计算结果与试验测量结果一致,冯·米塞斯应力均方根值与试验测量值之间的最大误差为5%,随机响应与试验测量结果一致。该研究为热-固-声耦合的弹性壁板的热振响应性能分析提供了一种有效的方法,为弹性壁板的热振响应性能预测提供了有效的参考。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.The contact of gaps in the thermal protection panels was considered in this paper,a finite element numerical model of the thermoelastic dynamics of the thermal protection panels was established,and a coupling method of thermal response and frequency domain linear perturbation analysis was used 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 was studied.Through the vibration mode analysis of the numerical model,the accuracy of the model was 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,connector and surface contact connection were 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 reference for the prediction of the thermal vibration response performance of elastic panels.

关 键 词：热防护壁板 热-声-固耦合 热振响应 有限元分析 

分 类 号：V214.4[航空宇航科学与技术—航空宇航推进理论与工程] V216.21