本文设计了窄流道内两端固定的矩形平板流致振动实验，获得了该平板的振动响应特性。结果表明：导致平板振动的物理机理为湍流激振和涡激振动。湍流激发平板的一阶固有频率响应，激励随流速的增大而增大。涡激振动频率与流速呈线性正相关关系，实验范围内得到的St数为0.24。当泄涡频率接近固有频率时产生“锁定”现象并引发共振，且存在非线性倍频响应。随着流速的变化，平板的一阶固有频率没有明显的变化趋势。此外，湿模态分析表明，声固耦合法计算得到的结果与实验吻合较好。

Experiments on flow induced vibration of a rectangular flat plate with two ends fixed in a confined channel are conducted in this study, and vibration response characteristics of the plate are obtained. The results show that the main physical mechanisms of vibration are turbulent-induced vibration and vortexinduced vibration. The turbulence excites response of the first natural frequency of plate and is amplified with the increasing flow velocity. The frequency of vortex-induced vibration shows a linear increase with the flow velocity, and the St number is 0.24 within the test range. The ‘lock-in’ phenomenon and resonance occur when the vortex shedding frequency is approaching the natural frequency, and the non-linear harmonic shows up. In addition, the wet modal analysis based on acoustic-solid coupling method were conducted and the predicted results show a good agreement with the experimental values.