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中文摘要：
在实测转轮叶片及转轮固有频率的基础下，运用有限元法对混流式转轮叶片及其整体进行模态分析，求出了单个叶片和转轮的各阶固有频率。通过计算值与实测结果的对比发现，单叶片计算结果和实测值吻合的较好。在转轮频率实验测试发现，不同支撑方式和不同测点下得到的转轮频率有一定差别。通过对比分析，验证了计算方法的准确性，这对于应用有限元法准确计算转轮频率，以及预测过流部件中由于水力不稳定而产生的各激振力频率是否会引起机组的振动甚至共振有积极意义。
英文摘要：
The nature frequencies of single blade and runner are calculated respectively by the modal analysis and the finite element method. The numerical results agree satisfactorily with the experimental values for single blade. The experimental results for runner vary with the changes of supporting means and measuring points. The accuracy of calculating method is validated. It is significant to calculate the frequency of runner precisely and to predict the frequency of exciting force induced by unstable flow and the phenomena of the unit vibration and resonance.
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