查询词典 natural vibration

Based on the alterative information of vibration mode and natural frequency in the presence of cracks, the thesis focus on the study of diagnosis index of cracks for plate and intelligent diagnosis of cracks using BP neural network.

本文主要依据板有无裂纹的振型和固有频率的变化信息，研究适于板的裂纹诊断指标，在此基础上，采用BP神经网络开展板的裂纹的智能诊断研究。

Based on a lot of calculating analyses on various working condition, the thesis give the approximate calculating formula of multi-order natural frequency of vibration of round silo.

对不同直径、不同高度的实体单仓进行了大量的、多种工况的计算分析的基础上，提出了计算圆型筒仓的多阶自振频率的近似计算公式。

Vibration is the most common natural phenomena, it is a basic form of the movement of objects.

实验介绍振动是自然界中最常见的物理现象，它是物体运动的一种基本形式。

Buffeting is a kind of usual and stochastic vibration with limited amplitude under natural wind.

抖振是桥梁在自然风作用下的一种经常性的、随机的限幅振动。

Then, carries on the vibration experiment with the different natural frequency and the optional frequency butt weld, enables its residual stress to obtain biggest reduction.

然后，用不同的固有频率及任选频率对焊接件进行振动实验，使其残余应力得到最大的降低。

The results show that the Raman peaks of N-N and O-H stretching vibration in nitrogen hydrates are observed at 2322.4cm-1 and 3092.1cm-1, respectively, which are very similar to those in natural air clathrate hydrates.

结果表明，氮气水合物中的N-N和O-O键的拉曼峰分别为2322.4cm-1和 3092.1.8cm-1，与天然的空气水合物中的数据十分接近。

Inspirited periodically by means of centrifugal inertial force, the lopsided rotor will produce coercionary vibration and inordinate noises, accordingly result in the exacerbating of the working conditions. At the same time, the components of the axletree will wear down quickly, that has reduced the natural life and working efficiency.

由于周期性的离心惯性力对转子的激励作用，不平衡转子将产生强迫振动和过度噪声，从而导致工作环境恶化，加速轴承等零部件的磨损，降低机器的使用寿命和工作效率。

From the motion equation of the bar which vibrates one-dimensionally and longitudinally, the model of mechanical four-terminal network and the transfer equations are set up, and the natural frequency equation of coniform horn and the ratio of speed of vibration are derived.

从变截面杆作一维纵振动的运动方程出发，建立机械四端网络的数学模型及传输特性方程，导出了圆锥形变幅杆的频率方程和振速比。

Some methods which are about how to get natural frequency, the computational and experimental methods of the vibration modes, and the computational methods of the critical velocity and the analysis of stability are included.

进一步探讨了圆锯片的振动特性，包括圆锯片固有频率的获得方法，振动模态的实验与理论计算方法，临界速率的计算方法以及稳定性分析等。

Adopts the all- air and natural ventilation system for the opening north wall;the floating floor and isolation table to isolate machine vibration,the sounds insulation materials between two walls to insulate noises in the plant;the air conditioning system separately for the audience area and sports area,the fan-coil unit and floor heating system only for the sports area to adapt the use after the Olympic Games,the natural ventil...

针对1层两个比赛厅北墙敞开的特点，采用全空气空调系统、排风从敞开空间自然排出方案；针对空调机房距4个比赛厅仅一墙或一板之隔的特点，空调机隔振采用浮筑楼板加减振台板、隔声采用双墙中间夹隔声材料层的方案；针对奥运会后观众区改作他用、运动区继续作集训使用的特点，观众区和运动区各有一套空调系统，运动区另设风机盘管和地板供暖；针对步枪、手枪射击时产生弹药味的特点，采用吊顶设通风格栅、高窗设电动开启的自然通风方案。

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。