结合天荒坪抽水蓄能电站尾水拦污栅流激振动试验 ,研究了拦污栅自振特性。对栅架整体结构模型的自振频率和振型进行了量测 ,并与数值计算结果作了对比 ,二者基本吻合 ,说明成果是可靠的 ;此外 ,还对栅架支承条件对拦污栅自振频率的影响以及单根栅条的自振频率特性进行了探讨。依据对单根栅条模型试验的结果 ,文中对 L evin建议的计算栅条自振频率公式的适用性提出了质疑 ,并对工程界所关注的栅条可能发生共振的原因提出了一个新的解释 Combined with the flow shock vibration test of tailrace trash rack of Tianhuangping Pumped Storage Power Station, the self-vibration characteristics of trash rack were studied. The natural frequencies and mode shapes of the whole structure of the grid were measured and compared with the numerical results. The results were in good agreement with each other, indicating that the results were reliable. In addition, The influence of natural frequency and the natural frequency of single grid are discussed. Based on the results of a single-grid model test, the article proposed the validity of L evin’s proposed formula for calculating the natural frequency of grids, and proposed a new reason why the grids concerned by the engineering may resonate Explanation