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通过试验研究了固定导叶结构在空气中及水中的固有频率及振型，得到了其固有频率在水中的变化规律。研究了不同水深对湿模态固有频率的影响。指出了数值计算时的流体域范围。
The natural frequencies and mode shapes of the fixed guide vane structure in the air and water are studied through experiments, and the variation rules of its natural frequency in water are obtained. The influence of different water depths on natural frequency of wet mode was studied. The range of fluid field in numerical calculation is pointed out.