固有频率

In the paper, the solution to the optimal structural design of machine tool spindle with respect to dynamic properties based on artificial neural network and genetic algorithm is studied.

本文研究了基于人工神经网络和遗传算法的机床主轴动态特性结构优化设计的求解方法，利用人工神经网络实现机床主轴动态特性的近似分析，借助遗传算法实现给定固有频率下的最小重量设计。

Forced oscillation test results of rolling table show that the theoretical analyses are good in accordance with test results under condition of the different vertical location of tank within the ship, different water level of wing tanks and different opening of the damping baffle respectively.

结果表明，研制的试验摇摆台能够模拟在波浪作用下船舶横摇运动，设计的被动式U型减摇水舱具有一定的减摇效果；试验确定的水舱固有频率与理论估算值符合；对不同垂直位置布置、不同边舱液位高度和不同阻尼挡板开度情况下摇摆台的强迫振荡试验表明，理论分析与试验结果具有很好的一致性。

Be spreading the feeling machine discharge tube vibration within outer shell containits proper frequency.

工作原理 Work principle 在传感器外壳中的流量管振动有它的固有频率。

The influence of parameters such as high order mode shapes,horizontal and vertical power spectrum density,basic wind pressure, span and weight of the roof,damping ratio,terrain categories and support restraints, which are usually critical to the wind-induced vibration responses,are discussed.

尽管这些大跨屋盖结构的形式不尽相同，但它们都具有一些共同特点，即质量轻、柔度大、固有频率低、阻尼小等特点，它们都属于风敏感结构，因而风荷载就成为设计这些屋盖结构的主要控制荷载之一。

The transmission mechanism is a plane six-bar mechanism that is made up of two plane four-bar mechanism. Its natural frequencies and mode shapes are obtained by overlapping and synthesizing the mode of each component.

主传动机构是由2个平面四杆机构串联而成的平面六杆机构，通过对各构件的模态进行模态叠加和模态综合，得到传动机构的固有频率和振型。

At low laser field limit, these results are consistent with that obtained from the traditional non-harmonic oscillator model, nay, the corresponding characteristic frequency of oscillator and the nonlinear coefficient can be found self-consistently from the presented model.

在低场近似下，这些结果可自洽地过渡到传统的非简谐振子模型，并可得到对应的谐振子的固有频率和非线性系数。标签强激光场部分离化等离子体束缚电子非线性极化 Intense laser field Partially stripped plasmas Bound electron Nonlinear polarization

Three-dimension finite element of off-highway dump cab with rubber isolator is set up Static strength analysis and modal analysis are conducted Distribution of stress in typical operating mode, the first 10 mode natural frequencies and mode shapes are obtained The conclusion is that the static stress will not lead to the breakage of ca

建立了考虑橡胶减振块的某非公路自卸卡车驾驶室三维有限元模型，进行了驾驶室的静强度分析及模态分析；得到了典型工况下的驾驶室应力分布规律和驾驶室的前 10阶固有频率及振型。

However,this kind of structures has a very low iriherency frequency,and easy to vibrating.So it is important to pay more attention to research on the FRM.

而这种结构具有极低的固有频率，在运动时或定位时容易产生弹性振动，影响运动平稳性和定位精度，因此柔性机械臂的控制研究具有特别重要的意义。

These formulas have been also used to calculate the practical syst e m.

通过计算隔振系统的固有频率可以知道隔振系统的隔振效果。

Based on the body modal test, natural frequencies and mode shapes of two types of body with/without windscreens are obtained. The two types of body finite element models are established, and modified models are also founded.

通过车身模态试验，得到了带与不带风窗两种车身的固有频率和振型，建立了两种车身有限元模型，并进行了模型修正？

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。