整体式叶轮主要振动形式是叶轮的弯扭振动。
The major shapes of the impeller are coupled bending and torsion.
桅杆的自振频谱密集，纤绳布置的不对称以及纤绳初应力的不同，使得弯扭振动为桅杆的主要振动。
The natural frequencies of the mast is very close; twisted vibration is the major vibration mode for the asymmetry of the guys layout and the difference of the guys' initial stress.
采用摄动法研究了楔形杆轴的固有纵扭振动，并且推导出了其固有纵扭振动的振型函数及频率特征方程。
The natural longitudinal or torsional vibration of a wedge-shaped shaft is studied with perturbation method. The vibration mode function and the frequency characteristic equation are derived.
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