查询词典 natural vibration

The formulas for calculating natural frequency and vibration transmission ratio are given.

给出了钻柱轴向振动的固有频率和振动传输公式。

In this paper, the natural characteristics of TSS will be analyzed firstly, and then the peculiarity of its frequency and vibration will be summarized.

本文第四章首先对张弦桁架结构的自振特性进行了分析，对其自振频率和振型的特点进行了总结。

Further more, the related reaction barriers were evaluated on the basis of single point energy with zero point vibration correction, and the distribution of natural charge was analyzed at MP2/6-311++G** level.

同时在MP2/6-311++G**水平上对各驻点做了单点能计算和零点能校正，计算出各反应通道的活化能，进而确定了该反应的主反应通道，其活化能为42.52 kJ/mol。

As a further studying, the "beat" oscillation phenomenon appearing beforce the chatter occurs is analyzed and it is found that there is a self-excited vibration frequency f during the rilling. Farthermore, if the frequency f is infinitively close to one of the natural frequencies of the rolling mill system then an instability will occur.

作为颤振振因的深化研究，对颤振出现前的&拍振&现象进行了分析，推证了轧制过程中有一个自激频率f存在，而且当它与轧机系统的某个固有频率无限接近时会立即引起轧机工作的不稳定。

Along with rapid development of technology.all sorts of engineering structure became more and more gigantic; for the sake of their credibility and good function, motive characteristic problem of the structure become an important topic in the engineering technique realmwhich need an earnest research and settlementln the windproof and quakeproof design of the structure and the bridge,the natural frequency of the structure vibration is a very important parameter.

摘要随着科学技术的飞速发展，各种工程结构愈加巨型化，为了保证它们的可靠性和良好的性能，结构的动力特性问题越来越成为工程技术领域里需要认真研究和解决的重要课题。

This thesis is a part of the National Natural Science Foundation (No. 50235010):The development of in-plane vibration measurement system with Laser Doppler vibrometer.

本课题是国家自然科学重点基金项目(编号：50235010)之子课题：激光多普勒面内振动测试系统的研发。

In flexibility of different viscoelasticity material the model is measured and ply falls, calculated respectively the amplitude of transverse stress between factor of loss of the first-order natural frequency that submarine compression carapace is shedding vibration of the damp in field, structure and layer.

在不同粘弹性材料弹性模量和厚度下，分别计算了潜艇耐压壳在流场中阻尼振动的一阶固有频率、结构损耗因子和层间横向应力的幅值。

Through the analysis of vibration modality, the results depicts that the conveyor goes cross shake under its first natural frequency, and it also occurs a big deformation at the joint of cone and cylinder sections.

螺旋输送器的模态分析的结果表明螺旋输送器在第一阶固有频率下是发生横向振动，柱锥内筒连接处变形较大。

Finite element method is based on the actual ship models, a true reflection of the real ship distribution of the specific structure. This paper also uses empirical formula to calculate the inherent frequency of the catamaran; contrast them in the process of modeling the structural stiffness, and quality of the different treatments, as well as natural frequency calculated from the results of differences analyze the different and the reason between the finite method and the empirical formula method which used to calculate the inherent frequency of catamarans in the vibration analysis.

有限元方法是根据实际船型，较真实的反映了实船结构的具体分布特征；本文还采用经验公式对该船的固有频率进行了计算，对比它们在建模过程中对结构刚度、质量的不同处理，以及计算所得固有频率结果的差异，分析了在双体船振动特性分析中有限元法与经验公式法的结果略有差距及其原因。

Effects of the downhole temperature on axial vibration natural frequency of drill string in deep wells is investigated.

分析了井下温度对钻柱轴向振动固有频率的影响，推导出了井下任意温度时钻柱轴向振动固有频率的计算公式。

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