本文提出了对包含有流动流体的管道自由振动频率的一个计算方法。
In this article, a calculation method is put forward for free vibration frequency of a pipe which contains flow fluid.
用里兹平均法导出了系统的自由振动频率方程，并举出一计算实例。
The equation of free vibration frequency of this system has been derived by Averaging Method of W. Ritz and a numerical example is given.
通过对44种网架自由振动频率的分析，得出了网架自由振动的一般规律，确定了网架自由振动频率的影响因素。
Through free vibration frequencies analysis of 44 PSGs, the general rule of PSGs is achieved and influence factors for PSGs are determined.
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.
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.
边界条件对耦合效应有较大的影响，较强的边界条件使椭圆板热弹耦合自由振动的频率变低，但振荡幅度增大。
The boundary conditions has strong influence on the coupling effect, the stronger it is, the smaller frequency of free vibration is but the larger amplitude is.
以位移模型为基础，用有限元中的分离变量法的理论，求解了圆柱壳自由振动的固有频率，计算结果与壳体解析解相一致。
This paper calculate inherent frequency of the free vibration of the cylinder shell with the theory of the separated variable method on the basis of displacement model.
为了获得模型的柔度特性、频率、阻尼等进行了脉动试验、自由振动、锤击试验等。
The model was subjected to pulsation, vibration, free vibration and hammering tests in order to investigate its flexibility, frequency and damping characteristics.
对圆弧拱面内自由振动的频率和非线性内共振现象进行了研究。
The in-plane free vibration frequencies and nonlinear internal resonance of circular arches were studied.
分析了矩形超声清洗槽槽底自由振动时的谐频率。
The frequency of the bottom of the ultrasonic cleaning basin is studied, during the bottom freely vibrating.
根据弹性薄板理论和振动理论，运用边界元法(BEM)分析了薄板弯曲自由振动的频率特性。
According to the elastic thin plate theory and vibration theory, a boundary element method (BEM) was used to analyze the frequency characteristics of a thin plate in lateral free vibration.
建立刚性悬挂接触网的自由振动有限元模型，计算其固有频率和振型。
The finite element model of the free vibration for the rigid suspension catenary and pantograph is set up.
研究结果表明：自由液面和刚性壁面对结构的固有频率、振动响应及声辐射的影响是不容忽视的。
The results of this research show that the impact of the soft surface and the hard plane on the structural natural frequencies, vibration responses and the acoustic radiation cannot be ignored.
本文研究剪切变形与转动惯量对梁自由振动的影响，提出了简便、准确的频率计算公式。
In this paper, the effect of shear deformation and rotatory inertia on the free vibration of a beam is studied. Thus a simple and accurate formula for the calculation of frequency is presented.
探讨了由于振动频率、颤振自由度、广义质量等参数的变化对机翼—外挂干扰颤振特性影响的一些特点。
This paper probes the features of the effect on the external stores jam flutter characteristics due to the variation of parameters of vibration frequency, flutter freedom and generalized mass.
由动力学的一般解，导出了扇形板和扇形环板在广义弹性简支和广义刚性滑动边界条件下自由振动的频率方程和振型；
From these dynamic solutions, frequency and mode shapes of sectorial plate and sectorial annular plate under boundary conditions of GSS and GRS are derived.
文中算例表明，在不增加自由度的前提下采用修正单元进行自由振动分析，结构的频率计算精度可以明显提高。
The numerical results in the paper show that the modified element is used to analyse the free vibration, and the accuracy of the structural frequency is greatly raised at no increasing the freedom.
从理论上分析了轴向载荷存在的情况下钻柱横向自由振动的规律，获得了钻柱横向振动固有频率。
The rule of lateral vibration under axial load was studied in theory, the inherent frequency of drilling string was obtained.
本文提出多自由度振动系统固有频率的一种近似解法。
A new approximate solution is given in this paper to estimate the fundamental frequency of vibration system with multiple freedom degree.
给出了单悬索系统的振动基本方程，及线性化方法确定系统自由振动的频率与模态方程。
The general equations of the vibrations of the single cable system have been erected, and the linear theory is used to determine the frequencies and the modes of the cable system.
相对于一般振动试验，其可达到的频率范围较高，且可实现六自由度振动和快速温变的综合。
Compared with ordinary vibration test, it can achieve a higher frequency and can make the complex test which combines six degree-of-freedom vibration test and rapid temperature changing test.
相对于一般振动试验，其可达到的频率范围较高，且可实现六自由度振动和快速温变的综合。
Compared with ordinary vibration test, it can achieve a higher frequency and can make the complex test which combines six degree-of-freedom vibration test and rapid temperature changing test.
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