Each given state of MHD has an inherent fluctuation frequency (eigenfrequency of MHD). 每种特定状态下的磁流体都具有一个固有振荡频率(MHD特征频率)。
There is certain relation between eigenfrequency and bridge rigidity and displacement check coefficient. 自振频率与桥跨刚度、结构挠度检验系数存在一定关系。
On the basis of the analysis of the twisting vibration of rotary sucher-rod string, a formula of calculating every harmonic vibration eigenfrequency is presented. 在综合分析抽油杆破坏形式的基础上 ,肯定了采油过程中抽油杆扭转振动的客观存在 ,分析了抽油杆产生扭转振动的原因。
The geometric parameters of two cavities are optimally seeked out so as to make the eigenfrequency between the cavities couple each other and impel out fluid resonance. 虽然串联喷嘴阻力损失的增加，使射流平均能量有所降低，但射流的瞬时能量得到了调制，激励出更大的流体振荡。
Our studies indicate that the strucural misalignment causes the eigenfrequency up-shift or down-shift, which depends on the ratio of the outer-wall radius to the inner-rod radius. 同轴结构的内外导体柱的轴线不重合（出现结构性偏心），将引起本征频率漂移，本征频率发生上移还是下移，与内外导体柱的半径比值相关。
On this test rig, by changing its speed, the speed ratio and the position of gears, the mass unbalance response, eigenfrequency and the critical speed are investigated. 在该实验台上，研究了转速、速比及齿轮位置变化对系统的不平衡响应、固有频率及临界转速的影响。
