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.
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.
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.
得到的结论是：对于叶片的前七阶振动，通常的叶片固支状态对叶片自振频率计算值几乎没有影响。
The conclusion shows that the calculated results of blade intrinsic vibration frequencies bear no relation to the common fix states for the first seven-order blade vibration.
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.
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.
由于曲轴系统装有转动惯量很大的部件，所以曲轴扭转振动的自振频率比较低，往往会在工作转速范围内产生共振。
The crankshaft system installed with component which has enormous moment of inertia that leads to lower frequence of forced torsional vibration for crankshaft.
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.
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.
用多台起振机进行稳态强迫振动试验，测定了该坝前十阶自振频率、阻尼和振型。
The first ten natural frequencies, damping ratios and mode shapes of the dam were measured through steady forced vibration test using multiple vibrators.
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.
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.
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.
应用推荐