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.
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.
对于各层结构不同的高层建筑、应用结构摄动理论取得了结构自振频率的修正计算公式。
For different story units of structure, the theory of structural perturbations is used. The correct calculation formulation of free vibration frequency is obtained.
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.
从工程上常用的振动设计准则出发，定义了振动问题的破坏模式，给出了以结构自振频率和外载频率为基本随机变量的安全边界方程。
A vibration failure mode of structural system was presented according to engineering design criterion. The safety margin equation of the vibration failure mode was developed.
研究分析中考虑了不同膜材料的弹性模量、不同膜的初始预应力、不同索的初始预应力以及不同结构高跨比对膜结构自振频率的影响，获得了索膜结构遮阳篷的风振有益的结论。
The results of the computation show us some variation regularity about the cable-membrane structure. It will be available for the further study about the response of the structure under the wind.
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.
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.
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.
结构的自振频率计算是弹性分析的重要内容，自振频率的大小直接影响到结构在抗震设计中的地震作用。
Calculation of structural natural-frequency is the important content of elastic analysis, and its value directly influences the seismic action in seismic design.
水下结构的自振频率不仅受流体动水压力和水深的影响，还受其运行速度的影响。
The self-vibration frequency of submarine structures are influenced not only by fluid dynamic pressure and water depth, but also by its moving speed.
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.
本文通过实际房屋结构中钢筋混凝土楼板的动力测试，表明在实际工程中通过对比动静载测试结果，可以用实测的自振频率对钢筋混凝土板的完好程度做出评估。
In the paper, by contrasting the measured static and dynamic results, it is shown that the RC floors 'damage extent could be evaluated by use of measured natural frequencies in practical engineering.
但不同频率地震波输入将对建筑物减振效果产生怎样的影响，减振效果和结构物本身自振频率是怎样的关系，这些是以往的时程分析所不能解决的。
But in the analysis, influence of different frequency input on control effect, and relation between the control effect and natural vibration frequency of the structure can't be solved.
结构动力特性中，自振频率是反映结构自身特点的重要参数，深入分析体外预应力结构的自由振动频率是研究体外其动力特性的基础。
In the structure dynamic performance, nature frequency is a very important parameter, the in-depth analysis on nature frequency is the research base of external prestressing concrete structure.
大跨空间结构自重轻、柔性大、阻尼小、自振频率低，对风荷载比较敏感，风荷载已经成为大跨空间结构设计的重要荷载。
The light self weight, large flexibility, small damp and low natural vibration frequency make it very sensitive to wind load.
通过实测复合墙板试点工程结构的动力反应，获得了结构的自振频率、振型和阻尼比等模态参数。
The natural frequency, modal shape and modal damping ratio of the typical structural of composite wallboard (rapid wall) system are got by dynamic behavior measurement.
作用于结构上的质量大小对结构的自振频率影响明显。
It is clear that the magnitude of the masses exerted on CSRS influences its natural frequencies greatly.
分别用幂法和QR法计算结构的第一和所有自振频率。
The first natural frequency and all natural frequencies areobtained by the power method and the QR method, respectively.
结合一工程实例，采用子空间迭代法求出了该网壳结构的前2 0阶自振频率和振型，分析了其振动规律；
The first 20th order natural frequencies and vibration modes of the single layer spherical dome are obtained, and its vibration law is also analyzed by using subspace iteration method.
自振频率及对应的振型是结构的固有特性，也是承受动力荷载结构设计的重要参数。
The frequency and the corresponding shape of free vibration are the structural natural characteristics and the important design parameters of structural subjected to dynamic loads.
自振频率及对应的振型是结构的固有特性，也是承受动力荷载结构设计的重要参数。
The frequency and the corresponding shape of free vibration are the structural natural characteristics and the important design parameters of structural subjected to dynamic loads.
应用推荐