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free vibration
相关语句
  自由振动
    Free vibration of longitudinal stiffened cylindrical shell under water
    水中纵向加肋圆柱壳体的自由振动
短句来源
    Analysis and Research on the Hydroelastic Free Vibration of Stiffened Rectangular Plate
    矩形加筋板水弹性自由振动分析和研究
短句来源
    Study on Hydroelasticity of Free Vibration for Thin walled Beams of Ship's Hull
    薄壁梁型船舶结构的水弹性自由振动
短句来源
    Buckling and Free Vibration Study on Orthotropic Circular Cylindrical Shell Under Axial Load
    轴向压力作用下正交各向异性圆柱壳的稳定性与自由振动特性分析
    Brief reviews about elastic stability, free vibration, transient dynamic response and harmonic dynamic response of circular cylindrical shells are given first.
    本文首先对圆柱壳的稳定性、自由振动、瞬态和稳态动力响应研究进行了简要回顾和评述。
短句来源
更多       
  “free vibration”译为未确定词的双语例句
    Free Vibration of Analysis and Comparison Study of Orthotropic Circular Cylindrical Shells
    正交各向异性圆柱壳的振动分析及比较研究
短句来源
    The effects of shell's parameters (L/R, h/R) and material features on the free vibration characters have been studied in detail.
    本文详细讨论了壳体参数 (L/R、h/R)和材料特性参数 (Eθ/EX)等对振动特性的影响。
短句来源
    Buckling and free vibration study of orthotropic circular cylindrical shell under axial load
    正交各向异性圆柱壳在轴向压力作用下的静动态特性分析
短句来源
    According to the above theories ,the author composed and debugged more than 6000 lines computational programs in FORTRAN and MATLAB . It can be used to calculate the free vibration of plate,beam ,grillages or stiffened plate structure respectively and plot the corresponding mode shapes .
    根据以上理论,采用FORTRAN语言和MatLab晤言编制并凋试通过6000余行微机计算程序,可分别进行板、梁、交叉梁系和加筋板结构的振动计算,并绘制相应的振型图;
短句来源
    We used Jaccobi method to finish the free vibration calculation.
    在论述了自由振动计算的理论基础上,还列举了实际算例的扭振计算,证明此方法在解决复杂分支轴系自由扭振计算方面是一种有效、方便的方法。
短句来源
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  free vibration
The scheme of gas-abrasive wear test of turbine compressor blades under free vibration of blades, including at high temperatures, is proposed.
      
Investigation of Fatigue Damage of 20Kh13 Structural Steel and its Compositions with Fused Coatings by the Free Vibration Method
      
It is shown that the dynamics of variation of the free vibration frequency of the samples is tightly related to the kinetics of fatigue damage.
      
Results of an analysis of the possibilities of diagnostics of fatigue damage of pieces from metallic materials and compositions with coatings obtained with the use of the free vibration method are given.
      
The perturbation can be proportional to any of the free vibration modes.
      
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Basing on the general solution of differential equation for transverse vibration of a beam and by means of the finite element method, two kinds of matrices for the vibration of beam element, i. e. mixed matrix and stiffness matrix are obtained and applied to the calculation of free vibration of ship grillage. Considering the common property of the mixed method and the displacement method, a unified method for solving the nonlinear eigenvalue problem of high order matrices with transcendent function is...

Basing on the general solution of differential equation for transverse vibration of a beam and by means of the finite element method, two kinds of matrices for the vibration of beam element, i. e. mixed matrix and stiffness matrix are obtained and applied to the calculation of free vibration of ship grillage. Considering the common property of the mixed method and the displacement method, a unified method for solving the nonlinear eigenvalue problem of high order matrices with transcendent function is presented. This method is very convenient and can avoid the loss of roots of eigenvalue equation. By this method the difficulty in the lack of storage of present computers for vibration analysis may be overcome.A very close approximation between theory and experimentsis showed in calculated examples. Therefore, it may be considered that the presented method is effectiveness.

本文从梁横向振动一般弯曲微分方程的通解出发,运用有限元的处理方法,获得了两种梁元矩阵——混合矩阵和刚度矩阵,并用于船舶平面板架自由振动的计算。针对混合解法和位移解法的共同特点,提出了一个简便而且不会漏根的求解高阶超越函数矩阵非线性特征值的统一方法,解决了振动计算时现有计算机内存不足的困难。 实例计算表明,理论值与试验值相当接近,说明本文的方法是有效的。

A general analysis method is presented for evaluating the free vibration characteristics of submerged, evenly spaced uniform ring-stiffened cylindrical shell with simply supported ends. The effects of the eccentric stiffeners are averaged over the thin-walled isotropic cylindrical shell. The coupling between the shell and fluid medium is taken into account. The solution is obtained through a direct solution procedure in which Flugge′s shell equations are used. Numerical results obtained are compared with...

A general analysis method is presented for evaluating the free vibration characteristics of submerged, evenly spaced uniform ring-stiffened cylindrical shell with simply supported ends. The effects of the eccentric stiffeners are averaged over the thin-walled isotropic cylindrical shell. The coupling between the shell and fluid medium is taken into account. The solution is obtained through a direct solution procedure in which Flugge′s shell equations are used. Numerical results obtained are compared with experimetal and analytical results by other inverstigators, The comparison of these results indicates the method used is this paper is reasonably accurate.

本文对密加肋的柱壳采用正交各向异性理论,将环肋“平摊”在整个柱壳上,用速度势来描述流场,通过流固交界面处的速度和位移的连续性条件,采用Flügge壳体理论建立了水动压力和柱壳的流固耦合振动方程。对两端简支的环肋柱壳在流场中的振动特性进行了研究,讨论了环肋尺寸变化、布置形式以及静水压力和水动压力对固有频率的影响。并对有关文献的理论和实验结果进行了比较,表明本文方法的结果是比较准确的。

Based on the thin walled beam theory of ships which takes account of the coupling between torsion and horizontal bending, and on the 2 dimensional fluid direct boundary element method which is constituted of simple Green function, the paper established a theoretical computation model of fluid structure interaction for thin walled beam's type of ships vibrating on water. The actions of fluid to structure were treated as the concentrated matrix of added mass whose elements were related to the vibrating frequencies...

Based on the thin walled beam theory of ships which takes account of the coupling between torsion and horizontal bending, and on the 2 dimensional fluid direct boundary element method which is constituted of simple Green function, the paper established a theoretical computation model of fluid structure interaction for thin walled beam's type of ships vibrating on water. The actions of fluid to structure were treated as the concentrated matrix of added mass whose elements were related to the vibrating frequencies and mode shape, and then added it to the uniform mass matrix of structure. By cyclical alternating , the nature frequencies and characteristics of free vibration for ships on water can be obtained.

基于考虑弯扭耦合运动的船体薄壁梁理论和以简单Green函数构造的二维流体直接边界元方法,建立一个用于薄壁梁型船舶结构在水上运动的流固耦合作用的计算模型.考虑到附连水质量随振动频率变化及与振动型式相关等因素,将流体对结构的作用处理为集束的附加质量阵,叠加到结构的一致质量阵之中.用迭代的方法求得船体在水上运动的湿固有频率和模态,进而可以得到其动力响应

 
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