自振频率

The data were analyzed by using of spectrum analysis method. Frequency and mode of structure are gained.

利用谱分析技术对所采集的数据进行了分析，得出了该结构的自振频率和模态。

We compose a neural network in which the input signals are the frame substructure natural frequencies and mode shapes, and output signals are the submatrix scaling factor.

框架子结构在动载作用下的自振频率和模态作为网络的输入，子矩阵参与系数作为网络的输出，用Levenberg一Marquardi算法训练网络。

At last, natural frequencies of practical pre-stressed composite space truss are tested with pulsatory method on construction site and its damping ratio is calculated, which gives another important data for engineering design. In addition, through the model experiment of pre-stressed rectangular square pyramid composite space truss, the correctness of characteristics of internal force and the feasibility of tension recovery method are proved.

最后，在工程施工现场用脉动法测试自振频率，并借助于振动衰减曲线和半功率点法计算出预应力组合网架——钢与混凝土的混合结构体系——的阻尼比，此又为工程设计提供了一理论依据；另外，通过正放四角锥预应力组合网架的模型试验，验证了结构内力分布特点的正确性以及张力松弛法的可行性。

They are effective in reducing noises of solid transaudient,are applicable for different types of large and small suspending equipment and pipelines.

该产品具有阻尼比大、自振频率低、安装方便、对固体传声有明显的降噪效果，对于各种大小设备及管道的吊装普遍适用。

This websteel system have passed result evaluation masterminded by the science and technology developmental promotion center of ministry of construction.

本课题是通过对这种轻钢结构房屋做地震模拟振动台试验来研究它的动力特性与抗震能力，如自振频率等。

The shape forming processing and loading experiment of a full scale tensioned membrane structure model was carried out with the model frequency measured.

本文对一较大的足尺张拉膜结构模型进行了张拉成型和荷载试验，并进行了模型的自振频率测量试验。

The energy method is applied to derive the natural vibration frequency and mode shape for a simply supported beam and simply supported plate before and after damage.

利用能量法近似地得出了损伤前和损伤后简支梁和四边简支板的自振频率和振动模态。

The formula calculating the first frequence of the bridge with the pile foundation is derived by using the Rayleigh Principle.

用Rayleigh法推导了桩基桥梁的第一自振频率的近似计算公式；在动力学效的原则下建立了桩—上—上部结构体系的等代简化模型，导出了动力等效嵌固深度l〓的计算公式，并与静力等效嵌固长度Z〓的计算公式进行对比分析，给出了静力公式的误差范围。

This paper presents a method used for calculating the natural frequency of gases subjected by small pressure pulsations in pipe systems.

本文介绍一种用以计算微压扰动下管道中气柱自振频率的方法。

Nature frequency and earthquake response of the structure are determined through shaking table test.

通过振动台试验，确定了模型的自振频率，多种地震波输入下的结构加速度反应和位移反应，对结构的抗震性能进行了综合评定。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。