水轮机固定导叶水下动态特性分析研究

Research on the Underwater Dynamic Characteristic Analysis of Turbine Stay Vanes

文中采用流固耦合方法建立了水轮机固定导叶水下动态特性分析的力学模型,系统地研究了水域尺寸对固有频率计算结果的影响,并定量地给出了水域模型的选择方法。研究表明,固定导叶在水下的模态振型与空气中基本一致,不同阶次的固有频率下降系数有所不同,且下降系数具有非线性的特点。

The mechanics model of dynamic characteristic analysis in water about turbine stay vanes is founded by fluid-structure interaction,the influence that different water area dimension come into being to the results of natural frequency is researched,and the selection method of water area model is given.Research indicated,the mode shapes in water for stay vanes are basic consistent with in air,but the natural frequency descend coefficients are different among different steps mode,and the descend coefficients have characteristic of non-linear.