中文摘要：

针对弹性薄壁壳体在高速气流作用下的耦合振动特性进行了研究。采用迭代耦合法对风洞实验中薄壁模型的耦合振动响应进行了数值计算，计算中采用浸入边界法处理流场域网格与结构域网格的运动关系，给出了模型仪器舱段测点上的应变功率谱密度分布以及振动能量在仪器舱段及其相邻位置上的分布情况。研究表明：在与高速气流的相互作用下，模型的振动能量主要集中在高频内某一频率点附近，模型的振动并非一般的低阶模态响应；虽然模型的仪器舱段具有一定的迎风角度，但该段的振动并非最为强烈。通过风洞实验对数值模拟结果进行了验证，结果表明：通过该数值计算程序可以对高速气流作用下的结构动态特性进行定性分析，但还需要通过进一步的风洞实验数据对数值模拟结果进行修正。

英文摘要：

The dynamic characteristics of elastic thin shell-structure interacted with high-speed airflow was studied. Based on domain-decomposition approach, dynamic response of thin shell-structure in wind tunnel experiment was calculated. In the presented numerical method, immersed boundary method was used to deal with the connection between fluid grids and struc- ture grids. Distribution of strain power spectrum density （PSD） for measuring-points and distribution of vibration energy in structural apparatus-cabin section were given. Results from numerical simulation show ： the frequency value corresponding to the maximum of strain PSD occurs in high frequency domain, and it is not the structural low-order natural frequency~ the vi- bration of structural apparatus-cabin section is not the most intense although it is the windward section. To prove the validity of numerical results, wind-tunnel experiment was carried out. Experimental results show that the presented numerical method can be applied for the qualitative analysis of structural dynamic characteristics considering fluid-structure interaction.