含水率对纵向基频振动法（FFT）测得的动弹性模量影响不显著。
While it had no significant effect on Resonant Frequency Vibration(FFT analyzer).
复杂振动中频率最低的成分(基频或一次谐波)。
The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
分子几何构型和振动基频对计算条件不太敏感，总能量和键能对计算结果较敏感。
The molecular geometry and the fundamental vibrational frequency are insensitive to the computation conditions, while the total energy and bond energy are pretty sensitive.
利用等效线弹簧模型近似计算了含裂纹转动轴的自由振动基频。
In this paper a model of the equivalent linear spring is proposed for approximately calculating fundamental frequencies of a vibrating shaft with an arbitrary crack.
文中提出了一种不空载运行变压器取得变压器铁心振动信号基频成分的负载电流法。
In this paper, a method extracting cores vibration signal with operating transformer at on-load condition was introduced.
数值实验结果表明：高阶质量矩阵对横向振动基频及低频的影响可忽略不计，但它们对高阶横向振动频率有很大的影响。
The numerical results indicate that the higher-order mass matrices have a negligible influence on the fundamental frequency, but they affect the frequencies of higher mode vibrations considerably.
本文介绍了变压器铁心振动的起因，提出了一种不必空载运行变压器即可取得变压器铁心振动信号基频成分的方法。
In this paper, the principle of core vibration was described, and a method extracting cores vibration signal without operating transformer at no load condition was introduced.
高耸工程结构复合振动基频计算公式计算简单，精度高，特别适用于识别桥墩和各种高耸建筑的基础约束刚度。
The calculation formula presented in this paper is simple in computation, high in precision, and adaptable to identify the foundation restraints stiffness of bridge piers and all kinds of towers.
将计算单裂纹结构基频的方法推广到求含多处裂纹梁弯曲振动的近似基频。
An approximate method of calculating the fundamental frequency of bending vibrations of multi-cracked beams is proposed on the basis of a modification of the method for single-cracked structures.
研究表明，传统的判断西瓜成熟度的含糖量与西瓜的振动基频有较好的相关关系。
The results showed that there was a better correlation between the first natural freqency( f ) and sugar contents of watermelon.
钻柱横向非线性振动的基频随着初弯曲最大挠度的增大而减小，初弯曲对钻柱横向非线性振动基频的影响随钻柱长度的增大而增大，随轴向压力的影响而增加。
The effect of initial deflection on the first frequency increased with either the length of drill stem or the axial compressive force on the drill stem increases.
弹性体的厚度和直径与振动基频基本成线性关系，有利于弹性发射装置的尺寸设计。
By means of some known parameters of elastic launch system, the basic frequency is estimated via simulation of the vibration model, and the influence of the parameters variation on the elastomeric…
弹性体的厚度和直径与振动基频基本成线性关系，有利于弹性发射装置的尺寸设计。
By means of some known parameters of elastic launch system, the basic frequency is estimated via simulation of the vibration model, and the influence of the parameters variation on the elastomeric…
应用推荐