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free vibration
相关语句
  自由振动
    FREE VIBRATION OF TALL SHEAR WALL STRUCTURES
    高层剪力墙结构的自由振动
短句来源
    The Free Vibration of Triangular and Rectangular Plates with Varying Thickness
    变厚度三角板和矩形板的自由振动
短句来源
    Analysis of Free Vibration of Structures With Discrete Elastic Supported and Modifying of its Simplification Mode
    具有离散弹性支承结构的自由振动分析及其它的简化模型修正
短句来源
    Free Vibration Analysis of Shear Walls with Openings by Finite Strip Method
    用有限条元法分析开孔剪力墙自由振动
短句来源
    WATER-SOIL-CYLINDER INTERACTION IN OFFSHORE TOWER STRUCTURES——FREE VIBRATION
    近海塔式结构的水-土壤-圆柱动力相互作用—自由振动
短句来源
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  自振
    Study for Measuring Propoties of Free Vibration on Structure Model by White Noise Excitation
    白噪声激振法测量模型自振特性的研究
短句来源
    The Frequency of Free Vibration of CircuIar Plate with Elastical Edge
    弹性边园板的自振频率
短句来源
    Boundary Element Method for Free Vibration Analysis of Gravity Dam
    用边界单元法计算重力坝的自振特性
短句来源
    A Precise Analysis Method for Free Vibration Characteristics of Chimneys
    烟囱自振特性的一种较精确分析方法
短句来源
    Influence of Deformation of Base Compress on Frequency of Free Vibration of Cylindrical Tall Buildings
    地基的压缩变形对高层筒体自振频率的影响
短句来源
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  固有振动
    THE FINITE DYNAMIC ELEMENT METHOD FO FREE VIBRATION ANALYSIS OF STRUCTURES
    结构固有振动分析的动态有限单元法
短句来源
    ANALYSIS OF NONLINEAR MODEL PROBLEMS BY THE FINITE ELEMENT METHOD OF LINES—Ⅲ. FREE VIBRATION OF MEMBRANES
    有限元线法求解非线性模型问题——Ⅲ.薄膜的固有振动
短句来源
    Study on Free Vibration of Thin Walled Concrete Filled Steel Tubular Members
    薄壁钢管混凝土构件固有振动特性研究
短句来源
    Free Vibration Analysis of Plate Using a Generalized Conforming Thick/Thin Element TMT
    广义协调厚薄板通用单元TMT的固有振动分析
短句来源
    As the third paper in this series of nonlinear applications of the finite element method of lines (FEMOL), the present paper applies this method to eigenvalue problems by presenting a FEMOL analysis of the free vibration of various membranes.
    本文是有限元线法(FEMOL)求解非线性模型问题的系列工作之三,对薄膜的固有振动这一特征值模型问题作了分析求解。 文中,首先用FEMOL对特征值问题的泛函进行半离散,得到相应的常微分方程(ODE)特性值问题;
短句来源
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  “free vibration”译为未确定词的双语例句
    The Free Vibration Analysis and Random Responses of the Prestressed Dual-Cable System
    预应力双层索系的动力特性和随机反应分析
短句来源
    A Calculation Method for Free Vibration of Frame Shear Wall Structures
    框架——剪力墙结构体系的自由振动计算方法
短句来源
    Finite Dynamic Element Method and Its Application in Thin Plate Transverse Free Vibration Analysis
    动态有限元法及其在薄板弯曲振动中的应用
短句来源
    Finite Dynamic Element for Frame Free Vibration Analysis
    框架结构振动分析的动态有限元法
短句来源
    FREE VIBRATION ANALYSIS OF THE STRESSED-ARCH STRUCTURES
    预应力拱架结构振动模态特性分析
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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A brief discussion is given about the influence on the vibration mode shapes and frequencies of structures due to large deformations of gellatin model, during a dynamical model test. As mentioned in the paper, the geometrical non-linear behavior of the medel caused by finite deformations will not introduce significant variations to its vibration periods, but its half-periods will be altered. That is, if the first half-period is lengthened, then the second half-period will be shorteneal and vice versa. For symmetrical-shaped...

A brief discussion is given about the influence on the vibration mode shapes and frequencies of structures due to large deformations of gellatin model, during a dynamical model test. As mentioned in the paper, the geometrical non-linear behavior of the medel caused by finite deformations will not introduce significant variations to its vibration periods, but its half-periods will be altered. That is, if the first half-period is lengthened, then the second half-period will be shorteneal and vice versa. For symmetrical-shaped structure, even the half-periods of vibrations will not be aftected. In general, the influence of such geometric non-linearing is not large, and the free vibration of structures may be Considered as harmonic.

本文讨论了软胶模型动力试验中,因有限变形引起的对结构物频率和振型 的影响。近似地说,仅仅因几何非线性并不改变结构的整个周期,但要影响半 周期的大小。假如前半周期延长了,那末后半周期缩短了。至于对称结构,半 周期也不受影响。一般来说,这种影响不大,所以振动还是接近简谐的。

The evaluation of the gust-loading factor is very important to the design of structures subjected to lateral pressure from fluctuating wind. In the determination of the peak factor of fluctuating wind pressure, references or codes of U. S. S. R, Canada and France usually take approximations conerning the distributions of fluctuating wind pressure and of mass along the height of the structure. Another assumption made is that the wind pressure along the horizontal length of the structure is constant. Thus only...

The evaluation of the gust-loading factor is very important to the design of structures subjected to lateral pressure from fluctuating wind. In the determination of the peak factor of fluctuating wind pressure, references or codes of U. S. S. R, Canada and France usually take approximations conerning the distributions of fluctuating wind pressure and of mass along the height of the structure. Another assumption made is that the wind pressure along the horizontal length of the structure is constant. Thus only approximate values can be obtained. This paper takes into account of the change of the gust pressure both along the height and the length of the structure, makes use of the theory of random vibration for resolution into natural modes of free vibration of systems with infinite or finite degrees of freedom, and derives a formula for the determination of the gust-loading factor. Furthermore, on the basis of experimental data from some typical districts in China and in some other countries, numerical values of gust factors have been calculated. Simplified formula's and equivalent formulas for gust factors of structures having uniform stiffness and mass along the height have also been given. The author has also prepared tables for design purposes and for reference in case of revision of the code on design loading.

在脉动风压下结构的风振系数是结构物特别是高耸结构物在抗风计算中的重要问题。苏联、加拿大、法国等国文献或规范[1][2][4][8]等在确定脉动风压的动力系数时,未能完整考虑沿结构高度脉动风压和结构质量分布的影响,并且常作了沿水平长度风压是不变的假定,求出了风振系数,因此有了一定的偏差存在。本文按无限或有限自由度体系,根据随机振动理论,按振型分解的方法,考虑风压沿高度和长度的变化规律,求出了风振系数。根据国内外风压实测资料,求出了风振系数中有关数据。对于沿着高度其刚度和质量都比较均匀的建筑物,提出了简化公式和折算公式。有关数据已制表格,可供应用和荷载规范修订时参考。

In this paper is presented a method for design of flexible steel framed foun- dation of turbine-compressors.Model study of free vibration and field vibration measurement are also reported herein.Calculated frequencies agree quite well with the results of model test and those of field measurement.The turbine-compressor has been in operation satisfactorily,amplitude being less than 5μ.

本文简要地介绍了柔性钢梁构架式汽轮空压机基础的设计方法,同时也包括了模型试验研究和现场试车实测情况。理论计算频率与模型试验结果及现场实测结果较好地符合。设备巳在良好工作情况下运转,基础振幅小于5μ。

 
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