A nonlinear crack modal, modified by the crack depth, is used to study a cracked rotor with the influences of whirl speed.
采用裂纹深度修正的非线性开闭裂纹模型，研究涡动影响下挠性裂纹转子的动力学行为。
2
The experimental modal analyses have been done under static condition and high-speed rotating condition for a given thin cylindrical shell by using shock vibration excitation method.
对一圆柱薄壳在静止状态和高速旋转状态下进行了模态试验。
3
Modal analysis not only offers a good ways which can calculate natural vibration frequencies, but also brings forward wholesome advices for researching vibration of high speed cutting system.