固有振动

It is disadvantageous to stability of lunar rover.The frequency of wheel wave is a function of velocity of wheel motor, dimension of wheel,density of grousers and wheel slide.

车轮在垂直地面上的周期波动和前进速度的波动对于月球车来说是一个周期性的激励，其频率应与月球车系统的固有频率避开，防止月球车前进时产尘较大的振动。

The dynamic experiment of the bellow was carried out,and the inherent properties and mechanical impedances were measured.

对DN200金属波纹管进行了振动特性试验，测量了波纹管的固有模态、机械阻抗等各项动态特性参数。

In the present study, the effect of centrifugal force was investigated by three dimensional finite element analyses; the vibration characters of random mistuned blade-disc were also being investigated by probability methods and the Young's modulus of material of all blades are regarded as random parameters.

结果表明，离心力对失调叶片轮盘系统局部化振动有减弱作用；所有叶片弹性模量在5%误差范围的随机失调系统，其固有频率与非失调相差很小，即失调叶片—轮盘系统可以按照循环对称结构进行模态分析。

The investigations focus on the fundamentalphysics and solution methods of the effects of mistuning on the natural properties andforced response of the bladed disks.

重点研究了失谐对叶盘系统固有特性与受迫振动响应特性影响的基本机理及分析方法，并总结了失谐对叶盘系统动力特性影响的一般规律。

1 In Zhanjiang Power Plant has been analysed,and it is believed that the main causes to be as follows:(1)large deformation of the lowpressure cylinder leading to collision and friction between moving and stationary parts;(2)the vacant space under bearing pedestal and turninggear box bringing on lower rigidity;(3) the natural frequency of bearing pedestal is closing to the power frequency etc.

对湛江发电厂1号机4号轴瓦振动大的问题进行分析，认为其主要原因为：低压缸变形大导致动静碰摩，轴承座及盘车箱下部脱空引起刚度降低，轴承座的固有频率与工频相近等。

Unlike the aluminum retainers used in some engines, the this stainless steel component will not melt, break or warp despite the high combustion temperatures and vibration inherent to the inside of a pulsejet engine.

不像某些发动机所使用的铝保持架，不锈钢的这个组件将不会融化，破坏或变形，尽管高燃烧温度和振动的固有一pulsejet发动机内部。

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。

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。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷