基于能量法和特征值法的颤振预测数值方法研究

为研究适用于工程设计的颤振数值预测方法,采用能量法和特征值法对出现颤振现象的真实叶片进行预测。通过将2种数值方法的预测结果与试验结果进行对比,验证数值预测方法的精度和工程适用性。结果表明:2种方法都较准确的判断了某典型风扇转子叶片的气弹稳定性,与试验结果基本吻合,具有较高的工程实用价值。

Numerical Study of Flutter Prediction Based on Energy Method and Eigenvalue Method

In order to study the numerical method of flutter prediction applied on the engineering design, the flutter phenomenon of a fan blade was predicted by energy method and eigenvalue method. The precision and engineering applicability of the numerical methods on flutter prediction were validated by comparing the predicted results and test results. The results show that the energy method and eigenvalue method are accuracy to diagnosis the aeroelastic stability of a fan blade, which in good agreement with the test results and are of good engineering practical value.