自然频率

然后根据Laplace变换与Z变换的关系，可以得到系统的无阻尼自然频率和阻尼比。

The undamped natural frequency and damping ratio are obtained in comparison of Laplace transform with Z-transform .

研究了频率偏差系数k随电网自然频率偏差特性β改变对CPS考核值的影响。

A thorough study is made into the influence of frequency error factor k varied with grid 's natural frequency error performance β on appraisal value of Control Performance Standard ( CPS ) .

本科目即在教导学生如何应用ANSYS软体解有关结构，热传及自然频率分析等问题。

In this course , we teach students how to use ANSYS to solve the engineering problems .

基于WAMS的系统自然频率特性系数确定方法

Calculation of Frequency Characteristic Coefficients for an Interconnected Power System Based on WAMS

NLTK支持多种基于自然频率分布数据进行概率预测的方法。

NLTK supports a variety of techniques for projecting probabilities based on raw frequency data .

本文采用ANSYS程序对其建立其有限元模型，并用子空间迭代法对结构进行了模态分析，得到了结构的自然频率和振型特征。

The software ANSYS is adopted to establish the finite element model of the structure and the subspace method is used to analyze the structural modal characteristics , then natural frequencies and mode shapes of the structure are obtained .

文中利用Hamilton原理，采用Love薄壳简化假设，设位移为不受边界条件限制的多项式解，通过求解能量法的特征方程得到结构的自然频率。

From Hamilton 's principle , applying the Love 's simplification for thin shell , the displacements were assumed to be polynomial functions which are not limited by boundary conditions . The nature frequencies were calculated by solving proper characteristic equation .

然后将它们转化为对应的Fredholm积分方程，得到了材料性质对称分布的简支梁弯曲振动的自然频率。

By converting it to a Fredholm integral equation , numerical results of the natural frequencies for free vibration are obtained for simply-supported beams with symmetrically-distributed material properties .

联网条件下按联络线功率频率偏差控制（TBC）是自动发电控制（AGC）的主要方式，通过对其控制量进行分析，认为频率偏差系数取系统自然频率特性时能体现电网运行的原则。

The TBC is the main model used in AGC in the interconnected power system . When the coefficient of the frequency bias is equal to the natural area frequency responses characteristic , the system will operate meeting the principles well .

为了设计并加工轻重量、高刚度的用于Cassegrain式空间遥感相机中的主镜，首先根据重量和自然频率的高低优选主镜的背部基体形状。

A central supported primary mirror of Cassegrain system used in space remote sensing camera is studied in this paper . In order to obtain a lightweight and high stiffness mirror , the best rear shape is selected by the criteria of weight and natural frequency .

地震采集中检波器自然频率的试验分析

Test and analysis of geophone 's free frequency in seismic acquisition

计算了望远镜的前十阶自然频率和模态阵型。

The first ten nature frequencies and modals were calculated .

矩形平板的自然频率计算平板湍流摩阻系数的显式表达式

An explicit expression of the turbulent frictional drag coefficient for a flat plate

任意四边形薄板自然频率的加权残值法计算

Calculation of Frequency of Arbitrary , Tetragon Plate with Method of Weighted Residuals

这是空间氢原子释放的自然频率。

It is the natural frequency of emission of the hydrogen atoms in space .

结果表明，脱层降低了自然频率。

The results show that the presence of a delamination decrease the natural frequencies .

不同边界条件下脱层对层合梁自然频率的影响

Effect of delamination on the natural frequencies of laminated beam under various boundary conditions

研究表明，在所研究的频率范围内，弹性轴轴承系统存在两阶自然频率。

The result showed that a flexible shaft-bearing system has two order natural frequencies .

取得了修正剪切梁自然频率的特征方程。

The characteristic equation for free vibration of a modified shear beam is obtained .

重点介绍基于自然频率的波形综合雷达目标识别方法。

The emphasis is placed on wave form synthesis target discrimination based on natural frequency .

应用功的互等定理计算矩形弹性薄板的自然频率

Application of the Reciprocal Theorem for Calculating the Natural Frequencies of Rectangular Elastic Thin Plates

三峡升船机承船厢浅水船波自然频率的研究

Natural Frequencies of Shallow Water Waves in the Ship Reception Chamber of a Ship Lift

本文提出了用锁相环跟踪抖动机构自然频率漂移的方法，设计了一种新型抖动控制器。

A dither control method using phase lock technology is presented and a controller is developed .

模型导弹的自然频率计算

Natural frequencies of a model missile

讨论了梯度变化和转动惯量对自然频率的影响。

The effects of gradient variation and rotary moment of inertia on the natural frequencies are discussed .

关键词：微型陀螺仪、单晶、轴角速率感测、动自然频率与模态。

Keywords : micro-gyroscope , silicon single crystal , three-axis angular-rate sensing , natural frequency and mode shapes .

对某一梯度指数以小的改变，当自然频率超过临界频率，它会有突变。

For some gradient index , the natural frequencies have an abrupt jump when across its critical frequencies .

研究结果对在水平激励下的圆柱壳进行了频率响应，考虑自由液面的响应比没有考虑自由液面的响应高很多，且最大响应发生在液体晃动的自然频率附近。

The frequency response of cylindrical shell with free surface is analyzed with horizontal acceleration excitation of earthquake .

而当表面波的频率大于射流振翅摆动的自然频率时，频率锁定现象将不存在。

The phenomenon does not occur when the wave frequency is above the nature frequency of jet flapping motion .

让问题更复杂的是，一旦横杆的尺寸缩小，振动的自然频率便会增加。

Compounding this problem , the natural frequency of the vibration increases as the size of the beam is decreased .