大型雷达的自振频率是一个关系跟踪性能的重要指标。
The natural frequency of large radar is a very important index which effects the ability of catching targets.
作为算例计算了四边简支菱形板的自振频率和临界载荷。
The critical load and natural frequency of rhombus plates with simply supported at all edges are calculated.
本文的着重于地脉动测试自由场地自振频率的机理研究。
This paper emphasize in study of mechanism of vibration frequency for free site in microseism testing.
本文首先归纳了计算结构自振频率和振型灵敏度的方法。
Various methods for calculating the derivatives of structural characteristic frequencies and modes are summarized based on which the derivative expressions of sinusoidal responses are also derived.
阐明了土的侧向基床系数与桩的弯曲自振频率之间的关系。
The relationship between the modulus of subgrade and frequency spetra is explained.
在预测管壳式换热器的振动时，准确地计算换热管的自振频率是非常重要的。
Calculating natural frequencies of the heat exchanger tube is an essential step in predicting its potential for flow induced vibration failure.
简要介绍了基于频谱分析的汽轮机叶片自振频率测量系统的组成和工作原理。
In this paper, a natural frequency-measuring device for turbine blade is developed, and its constructing and working principles based on spectrum analysis are presented.
提出了一种测量既有桥墩自振频率的新方法，即冲击振动试验法(IVTM)。
An impact vibration test method (IVTM) for measuring natural frequencies of existing piers is proposed in this paper.
结果表明，考虑初始几何缺陷会使得拱桥的主要自振频率降低，振型发生改变。
Results showed that the defects in the arch decreased the frequency of free vibration and changed the modes.
本文运用三维有限元方法离散水体，研究了箱形术体的自振频率及动水压力振型。
In this paper, the natural frequencies and modes of box water body researched by using three-dimensional finite element method.
改进后的分析结果表明排气二分管罩的自振频率明显提高，振动噪声得到有效抑制。
The analysis of the (improved) structure shows that the increase of natural vibration frequency is visible, the vibration noise of the shield is suppressed distinctly.
最后自动组成空间刚体自由振动微分方程的系数阵，并计算出刚体的自振频率和振型。
Therefore, the differential equations 'coefficient matrix of the free vibration of the spatial rigid body is automatically formed, and free vibration frequency and its type can also be found out.
结果表明：结构自振频率随着节点相对刚度比的增加不断增大，当节点相对刚度比在0。
The results indicate that the natural frequencies are increased with adding the relative stiffness ratio, and the change is apparent when the ratio varies between 0.
岸边起重机结构中有许多长的弹性圆截面杆件，自振频率比较低，很容易发生横风共振。
There are many long and elastic round cross-section rod structures in quayside container crane, whose frequency are so low that it is easy to arouse crosswind resonance.
文中不仅介绍了重力拱坝自振频率与振型分布的研究结果，而且进行了振动应力的计算。
The authors not only presented the results of the investigation about the frequency of vibration and its amplitude of massive arch dam, but also computed its vibration stress.
结果表明梁的自振频率，荷载的行驶频率和荷载与梁质量比对梁的振动都起着重要的作用。
All results show that the beam dynamic behavior is tied up with these factors: frequency of beam, moving frequency of the load and the ratio of vehicle unit mass to beam unit mass.
分析了发动机振源对车架振动的影响，使车架主要模态的自振频率避开了发动机转速范围；
Then the author analyses the effect of the frame vibration and tries to make the natural frequency of vibration beyond the range of engine revolution rate.
为避免桥梁共振，设计时应满足第一阶竖向自振频率大于车辆最大速度与车辆长度的比值。
To avoid the most dangerous resonance, the first vertical frequency of the bridge should be greater than the ratio of the maximum vehicle speed to the vehicle length in design.
根据动力学计算理论，提出一种新的方法来修正跳车法实测频率，以获取较准确的自振频率。
According to dynamics computation theory, this article proposed one new method revises jumps off the law actual frequency, gains the accurate base frequency.
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。
In this paper, the natural characteristics of TSS will be analyzed firstly, and then the peculiarity of its frequency and vibration will be summarized.
采用车-桥系统相互作用的计算模型，对不同跨度简支梁桥的竖向有载自振频率进行了深入研究。
The vertical loaded free frequencies for the different span simply supported beam Bridges are investigated with the vehicle bridge system model.
以声波在各层介质中传播时波速的加权平均值作为构筑物的平均声波波速，计算出结构自振频率。
It treats the weighted average sound velocity in different mediums as the average sound velocity in the structure, thus the natural frequency of the structure is calculated.
而结构动力特性中的自振频率是反映结构自身特点的重要参数，是研究组合梁动力学问题的基础。
The natural frequency is a critical parameter of structure vibration; it is the foundation to investigate the dynamic response of composite beam.
协作体系的动力特性主要包括体系的自振频率和主振型，它是协作体系结构动力分析的基础和前提。
Dynamic characteristics of collaborated system mainly include natural vibration frequency and principal mode, which is the base and precondition of dynamic analysis for collaborated system.
对于给定算例，计算出的自振频率与三维分析的结果吻合良好，说明所推导的二维解具有足够精度。
The vibration frequencies given by the solutions are in good agreement with the results of three dimensional analysis.
通常臂架自振频率的计算多关注于工作平面，而对垂直于工作平面的臂架自振频率的计算则被忽视。
The existing calculations for free frequency of the jib involve the vibration in the working plane and the vibration in the direction perpendicular to the working plane is usually neglected.
通常臂架自振频率的计算多关注于工作平面，而对垂直于工作平面的臂架自振频率的计算则被忽视。
The existing calculations for free frequency of the jib involve the vibration in the working plane and the vibration in the direction perpendicular to the working plane is usually neglected.
应用推荐