基本频率

求解地基-结构系统运动方程的基本频率法

Fundamental Frequency Method for Solving Motion Equations of Soil Structure Systems

提出了一种电能质量干扰环境下的电力系统基本频率估计方法。

Finally , the fundamental frequency estimation under different PQ disturbances condition , such as harmonics , voltage .

运用通用有限元软件ANSYS，采用梁系结构的空间有限元模型计算，对结构的成桥状态和施工状态进行了自振特性分析，得到了基本频率和模态。

Applied with the general purpose finite element sofeware ANSYS introducing into the beam element construction dimensional finite element model for calculating , the vibration characteristic in the constructed and operational phase of bridge are analyzed , the frequences and vibration modes about the bridge are showed . 3 .

powernowd：这个调控器守护进程根据处理器负载改变基本频率，用户可以选择四种行为模式。

Powernowd : This governor daemon bases frequency changes off of the processor load and has four different behavioral modes that users can chose .

附集中质量悬臂板基本频率的数值解及其应用

Numerical solution of natural frequency of cantilever applied concentrated mass and its application

让我们编写一些程序以使用基本频率分析将编码信息解码。

Let 's write something that uses basic frequency analysis to decode an encoded message .

电能质量干扰环境下的电力系统基本频率估计

Fundamental Frequency Estimation Under PQ Disturbances Condition

雄蚊只对基本频率的雌蚊翅振音起反应，雌蚊翅振音的偶然变化不会降低其对雄蚊的引诱力。

The male mosquitoes show response only to the main frequency of the female wingbeat sound .

剪切变形能对等截面悬臂梁横向自由振动基本频率的影响

Effect of Shearing Force on Natural Frequency of Equal Cross Section Cantilever Beam in Lateral Free Vibration

把与这些基本频率单元所对应的时域序列相加便得到滤波器的冲激响应。

Adding together the time sequences corresponding to these EFU , the filter 's impulse response can be obtained .

折射校正载波相位测量是由两组不同的基本频率宽巷载波相位测量组成。

Refraction correction carrier phase measurements is composition of two different sets of fundamental frequency wide-lane carrier phase measurement .

声学实验项目包括基本频率、音长、音强和共振峰。

The experimental items include the fundamental frequency ( Fo ), the rimal duration , the amplitude and the formants .

分析师使用这些推断和基本频率分布来评估域或列的完整性，并报告得到的发现。

The analyst works with these inferences as well as the basic frequency distribution to assess the integrity of the domain or column and report findings .

并运用大量仿真，对本方法在谐波、电压波动等干扰环境下基本频率估计的有效性进行验证。

Finally , the fundamental frequency estimation under different PQ disturbances condition , such as harmonics , voltage fluctuations , etc , is analyzed by simulation respectively .

分析了随上部结构质量的增加，桩-土-框架结构体系模型的基本频率和阻尼比的变化趋势。

The various tendencies of the basic frequency and the damping ratio of the pile-soil-frame structure system model has been analyzed with the top structure quality increase .

研究结果表明，考虑地基土、砂砾石垫层、上部结构共同作用时，结构的基本频率明显减小，相应的基本周期明显延长；

The results shows that the fundamental frequency of the model which takes the combined activate into consideration reduced evidently , and the fundamental period prolonged evidently .

以正方形板为例对不同厚度的板求得了基本频率，并与由工程理论所得的薄板振动公式计算结果作了比较。

Illustrating with an example of square plate the fundamental frequencies of plates of various thickness are computed and compared with the results by engineering theory of thin plates .

本文由水库中塔体和河道中桥墩等建筑物的振动问题出发，取断面为圆形等截面，对水弹性自由振动的基本频率进行了研究。

Based on the vibration problems of the intake tower in reservoir and the bridge pier in river , natural frequencies of hydro-elastic vibrations of upright cylinders are studied .

经钢筋拉接后的填充墙体具有较高的基本频率，一般随主体结构的振动而振动，不会引起加速度局部放大的二次振动问题。

The infill walls connected by steel bars with the frame have high fundamental frequency , which generally vibrating with the main structure and do not cause the secondary vibration .

液压系统中阀门（换向阀等）突然关闭时，液压泵的流量脉动频率和管道的基本频率相互作用，可能发生谐振。

In hydraulic transmission system , the pump 's flow pulse frequency and the pipes base frequency affects each other , if the valves shut suddenly , resonance oscillation may take place .

实测资料表明，各种不同激振方法所得成果甚为一致，坝体基本频率为3.60HZ，其对应振型为正对称型，与国内外同类型砼拱坝原体实测资料也基本相近。

The result has no difference under earthquake generated in different ways , with basic frequency of 3.6 Hz and normal-symmetry pattern , and agree with data observed at similar dams abroad .

通过分析，得出以下结论：（1）软土地基对隔震结构基本频率的影响远小于软土地基对非隔震结构基本频率的影响。

From the analysis results , one can get the conclusions as follows : ( 1 ) The soft soil 's affection to the basic frequency of BIS-SSI is much less than the ordinary structure .

通过建立有限元模型进行计算，详细研究了软土地基下铅芯橡胶支座基础隔震体系的基本频率和动力反应规律。

Through setting up the finite element models and performing the calculations , the basic frequency and the seismic isolation performance of lead-rubber bearing base-isolated structure considering soft soil-structure interaction under earthquake excitations are analyzed .

据此，可在井架载荷较小情况下，测量无载荷和有载荷下的井架结构基本频率，并通过计算公式确定井架的临界载荷。

Thereby the basic structural frequency of the derrick with of without load can be determined under the condition of miner load on the derrick , and the cirtical load of the derrick can be calculated .

首先导出薄板在附加集中质量时的横向弯曲自由振动方程，应用差分法解出它在三边自由和一边固支的边界条件下的基本频率。

Bending free vibration of cantilever plate applied concentrated mass has been presented . Under boundary condition with three sides free and one side fixed , natural frequency of this plate is solved by differential method .

该方法将数字陷波器等效成为一个全通滤波器减去一个由基本频率单元构成的点通滤波器，进而推导出计算数字陷波器冲激响应的数学公式。

As the trap filter is equal to an all-pass filter minus a point-pass filter composed of approximate triangle shaped elementary frequency unit , the formula of calculating the impulse response of digital trap filter is induced .

在假定位移的基础上，用能量变分法推导出核心单筒式悬挂结构中四面开洞核心筒体的扭转振动基本频率。

Based on the supposed displacement functions , the fist twist vibration frequency of the core tube with holes on the four sides of a single core tube hanging structure is denved by use of the variational method .

该方法通过一个改进锁相环系统实时跟踪输入信号的基波瞬时相位，输出基波瞬时角频率，进而得到输入信号的基本频率估计。

The PLL system could obtain basic component of the input , track the instantaneous phase of basic component , and output instantaneous angle frequency . Thus , the fundamental frequency estimation is obtained with instantaneous angle frequency .

此方法分为两步。首先对各个纤维角（0≤θ≤90°）代表着基本频率、单轴、双轴、压缩力、正、负剪切抵消载荷。

First , the six eigenvalues are calculated for various fiber angles ( O 0 90 °) by the Ritz method wherein each eigenvalue physically represents the fundamental frequency , uniaxial , biaxial , compression-tension , positive shear and negative shear buckling loads .

而经典Colpitts混沌电路由于受晶体管寄生参数的影响，其基本振荡频率与信号带宽最高只能达到所使用晶体管截止频率的十分之一。

In the classic Colpitts chaotic circuit , due to the parasitic effect of the employed transistor , the fundamental oscillation frequency and the signal bandwidth both can only up to be one tenth of the cut-off frequency of the transistor .