振动

A set of 15 degrees of freedom differential equations with time-variable coefficients is given.

得到了15自由度的时变系数振动微分方程组，为系统的振动分析奠定了基础。

Measured structural noise and air-borne noise of the model under different condition, as well as picked up and analyze the vibration signal.

6对实验样机进行了不同工况下的结构噪声和空气噪声动态测试，同时进行了该实验样机的故障振动测试，采集了减速器的振动信号，并对故障信号进行了分析。

Based on the above theories, some vibration characteristics of longitudinal acoustic horns are analyzed with finite element analysis software ANSYS. Some factors influence to large end amplitude distribution is studied such as big end diameter, length of horn, and diameter ratio of big end to small one. In addition, we carry on analysis and research to resonance frequency of large cross-section acoustic horn, amplitude magnification factor, wave node position of horn, transverse vibration situation and so on, and some related change rules are obtained.

在此基础上，通过有限元分析软件ANSYS对纵向超声变幅杆进行了振动特性分析，研究了变幅杆的大端直径、变幅杆长度、大小端面直径比对大端面振幅分布的影响，并对大截面变幅杆的谐振频率、振幅放大系数、变幅杆的波节点位置，横向振动分布等进行了分析研究，总结了相关的变化规律。

Those who are capable of holding this frequency of light anchor the vibration into earth and assist not only the earth herself, but also mankind in evolution.

那些人能够保持这光频率振动锚定振动进入地球之内而且不仅协助地球她自己，并且人类也同样进化。

In the fourth paragraph, how the theory of the damping to forging hammer foundation advances at home and abroad, the research and application of the implement for damping to forging hammer, the structure of damping to forging hammer and the calculation methods for forging hammer foundation vibration system, which are used at home nowadays, are particularly introduced.In the fifth paragraph, aiming at direct damping under anvil block of forging hammer, the author bases a mechanics model of two-degree with damping, and optimizes the vibration parameters both in frequency field and in time field, then finds out the new simple method of optimizing the vibration parameters of the damping device under anvil block of forging hammer.

第五章针对锻锤砧下直接支承式减振基础，建立了锻锤减振系统的二自由度有阻尼振动力学模型，然后用傅立叶变换法求出振动传递率的频率关系，用直接积分法求出砧座和基础位移的时域响应，并分别对频域函数和时域函数进行参数优化，最终建立起频率函数—时域函数—优化参数间的相互关系，从而找到了锻锤砧下隔振器参数优化的简便新方法。

Under the action of horizontal earthquake forces, buildings with brick arch roof and floors vibrates as a whole, and at the same time local vibration takes place in the arch.

本文对砖拱楼盖的计算，考虑了楼盖的局部振动及房屋的整体振动两种影响，以及不同楼层处砖拱楼盖的不同地震反应。

On the basic of the machine s structure,the mechanical model of damp dynamic multi-degrees freedom is built,the system parameters are analysized and determined. Theory of that the continuous conveyer of disc-tube assembly is a type of nonlinearity multi-degrees freedom vibration is proposed and prove...

根据输送机的结构建立起输送机有阻尼多自由度振动的力学模型，分析确定了系统参数，提出并论证了串联盘输送机是一种非线形多自由振动系统的理论基础。

Studying the effects of the relation between structural mode shape and direction of engine's shaking force on motorcycle's vibration is the subject of this paper. The studying method is based on test in association with the structural dynamic theory.

以实车量测的方式配合基本结构动态理论讨论机车引擎运转之振动传递特性，整车结构模态振型与引擎摇动力两者之间的关系对振动环境的影响是本篇论文的主题。

Produces each kind of stone material and the system granulatedsubstance, the dressing Hubei type breaker, the counter-attack typebreaker, the hammer type breaker, the impact type breaker, the circle锥式 breaker, the duplicate suitable breaker, the ball mill, thevibration gives, sand washer, shaker, flotation machine mine equipmentand so on the material machine.

生产各种石料及制砂、选矿的鄂式破碎机、反击式破碎机、锤式破碎机、冲击式破碎机、圆锥式破碎机、复合式破碎机、球磨机、振动给料机、洗砂机、振动筛、浮选机等矿山设备。

The vibration response of the viaduct structure by steel spring bearing, the viaduct structure by laminated rubber bearing, the track structure by Colon egg vibration damper, the track structure by steel spring damper and the ballast bed track structure are simulated through vehicle passed. The vibration parameter of the viaduct is optimized and the vibration transfer function characteristic of the ballast bed track structure and the track structure by steel spring damper are compared.

对钢弹簧支座高架桥结构、普通板式橡胶支座高架桥结构、克隆蛋减振器式轨道结构、钢弹簧浮置板减振器式轨道结构和普通碎石道床轨道结构在列车运行作用下的振动响应进行了仿真研究分析，对高架桥结构隔振参数进行了优化，比较了浮置板式和普通碎石道床轨道结构的振动传递特性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。