1) first and second order resonance
一阶和二阶回旋共振
2) second-order resonance
二阶共振
1.
The exploration leads to the following conclusions: with journal misalignment considered,the first-order natural frequency decreases but the second-order natural frequency increases;the amplitude of vibration for the second-order resonance is augmented;the minimum thickness of oil film is diminished whi.
得到的主要结论是:考虑轴倾斜时一阶固有频率略有下降,二阶固有频率略有上升;二阶共振时振动幅度增大;最小油膜厚度减小,最大油膜压力上升。
3) First formant
一阶共振峰
5) first and second order approaches
一阶和二阶方法
6) covariant spinor of first rank
一阶共变旋子
补充资料：不阶
1.不凭借。
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参考词条