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free vibration
相关语句
  自由振动
    Analysis of Free Vibration of A Pedestrian GRP Bridge with Skew Cable Stays
    斜拉式玻璃钢(GRP)桥的自由振动分析
短句来源
    Ratio Method of Free Vibration of Continuous Beam System
    连续梁自由振动分析的比值法
短句来源
    Free Vibration of Near Optimal Span Continuous Curved Beams
    近于优化跨度连续曲线梁的自由振动
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    FREE VIBRATION OF CIRCULAR ARCHES WITH VARIABLE CROSS-SECTION
    变截面圆拱的自由振动
短句来源
    Theoretical Study on Space Coupling Free Vibration Analysis of Self-anchored Suspension Bridge
    自锚式悬索桥空间耦合自由振动分析的理论研究
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  自振
    Analysis of the Free Vibration Characteristics of Railway Steel Truss Bridge with Train Load
    铁路钢桁梁桥有载自振特性分析
短句来源
    Study on free vibration of curved box girder bridges
    薄壁曲线箱梁的自振特性研究
短句来源
    Analysis on Free Vibration Frequency of Concrete Curved Beams Bridges
    混凝土曲线梁桥的自振频率分析
短句来源
    Analysis of Free Vibration Characteristics of Thin-walled Box Girder Based on Energy Variation Principle
    基于能量变分原理的薄壁箱梁自振特性分析
短句来源
    As stipulated in section 2 5 4 of《Technical Specifications of Urban Pedestrian Overcrossing and Underpass》CJJ69 95,in order to avoiding sympathetic vibration and alleviate pedestrian′s sense of insecurity,the frequency of free vibration in the vertical direction of the upper part of the overcross should not be less than 3Hz.
    在《城市人行天桥与人行地道技术规范》CJJ69 95第 2 5 4规定 :为避免共振 ,减少行人不安全感 ,天桥上部结构竖向自振频率不应小于 3Hz。
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  “free vibration”译为未确定词的双语例句
    The 1st lateral frequency of free vibration is 2.097 Hz. It agrees well with test-measured value 1.95 Hz. Both of them are satisfactory with limit value 1.125 Hz defined by Test Specification of Railway Bridge.
    计算得到其横向基频为2.097 Hz,与实测值1.95 Hz吻合良好,且满足现行《铁路桥梁检定规范》相应限值1.125Hz的要求。
短句来源
    Numerical results of the Humen Bridge are compared to data obtained from section model tests in wind tunnel by using the FVT and the Free Vibration Method, better agreements are found.
    5)采用有限体积法和强迫振动数值法计算了丹麦大海带东桥的气动导数和颤振临界风速,并将计算结果与风洞试验值、离散涡方法计算结果作了比较。 本文气动导数结果与风洞试验值一致性好、偏差小,也优于离散涡方法得到的计算结果。
短句来源
    Vibration mitigation of the cable using MR dampers in a purely passive mode, where constant levels of current are supplied to the damper, is examined by a series of free vibration tests and compared to that of using oil dampers.
    采用全索位移RMS作为评价MR阻尼器对斜拉索减振效果的指标,并与最优粘性油阻尼器进行了比较。 计算结果表明存在合适的MR阻尼器(最优的MF)使斜拉索的减振效果达到最佳,并与粘性油阻尼器的最佳减振效果相当。
短句来源
    The calculating results indicate supporting conditions have greater influence on free vibration period than connection modes of duck systems.
    指出斜拉桥振型会出现明显的分组现象,桥面系连接方式影响程度较小,弹性支承的影响程度较大。
短句来源
    The result shows that the seismic parameters (amplitude, frequency spectrum and lasting time) and the structural dynamic parameters (damping ratio, periods of free vibration and factor of elastic limit) play important roles in the total structural aseismic input energy and its distribution between damping energy and hysteretic dissipated energy, there have: 1) With the increasing of the ground motion amplitude, the total input energy increases rapidly, and the ratio of hysteretic dissipated energy becomes larger;
    结果表明,地震动三要素(峰值、频谱、持时)和结构自身动力参数(阻尼比、弹性极限)等因素对地震总输入能以及能量在阻尼耗能、滞回耗能之间的分配有重要影响。 主要表现为:1)随着地震动峰值增大,地震总输入能显著增加,并且滞回耗能比例变大;
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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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In this paper,the train and bridge are coupled together as one system by considering the spatial interaction between the wheel and rail and between the vehicle and bridge;the global equations of the system are set up by using d'Alembert principle and potential energy variation principle.In the case study,a truss bridge with a span of 92.964m and a real freight train is used.The numerical results of the free vibration frequencies of the bridge with train are close to the data of the bridge in the state...

In this paper,the train and bridge are coupled together as one system by considering the spatial interaction between the wheel and rail and between the vehicle and bridge;the global equations of the system are set up by using d'Alembert principle and potential energy variation principle.In the case study,a truss bridge with a span of 92.964m and a real freight train is used.The numerical results of the free vibration frequencies of the bridge with train are close to the data of the bridge in the state of resonance obtained from actual measurement.This also proves,on the other hand,the free vibration frequencies of a bridge and that of the train-bridge syetem calculated by simply adding the train mass into the bridge model are not concurrent with the bridge resonance frequencies.Finally,some researches have also been done on the dynamic characteristics of a bridge with train

本文采用将桥梁和车辆作为一个系统考虑的方法,通过考虑磨耗型踏面的轮轨接触关系和车桥空间耦合关系,应用势能变分原理,建立了列车和桥梁两个结构物一体振动的运动方程。然后以沪杭线41~#桥上行驶 YZ_(22)客车,N_1型货车和 ND_2机车为例,研究了桁粱有载自振特性,计算值与实测值良好吻合,从理论上证明了:将桥梁无载自振频率作为共振频率的概念不符合实际;直接将列车质量加入桁梁进行桁梁有载自振分析的方法十分粗糙。此外还对有载自振振型和频率的变化规律以及列车过桥时有载自振频率的变化规律进行了研究。

The main purpose of this paper is to present the work in analyzing free vibration and computing free vibration frequencies of the pedestrian GRP bridge with skew cable stays built in Chongqing Jiaotong Institute with analytical method and energy method. By both methods, the results were in a good approximation and had also been verified by field tests on the GRP bridge.

本文主要是对修建在重庆交通学院的斜拉式人行玻璃钢(GRP)桥进行自由振动分析和自振频率的计算。用解析法和能量法解,两种方法所得结果非常接近并为桥的现场实测所验证。 桥主体是由玻璃钢蜂窝夹层板构成的箱形结构。我们同时对箱形结构顶板和纵向隔板的局部自振频率进行了计算并获得良好结果。

A spline mode of the whole bridge corresponding to that used in tunnel test is presented for flutter analysis of straight suspension bridges with long span. In the light of the several assumptions,the differential equation and the spline expressione of aerodynamic force on flutter are derived. On the basis of the persent apalysis for free vibration and by means of trial and error, the final eigenvalue solution will produce the desired flutter frequency and then critical velocity of wind. A numerical example...

A spline mode of the whole bridge corresponding to that used in tunnel test is presented for flutter analysis of straight suspension bridges with long span. In the light of the several assumptions,the differential equation and the spline expressione of aerodynamic force on flutter are derived. On the basis of the persent apalysis for free vibration and by means of trial and error, the final eigenvalue solution will produce the desired flutter frequency and then critical velocity of wind. A numerical example is shown to demonstrate the applicability of the method.

本文建立了与气动实验相应的全桥样条模型,以分析吊桥颤振。根据片条假定以及所取用的力学模型,导出颤振微分方程和关于颤振导数的空气动力矩阵(气动阻尼阵和气动弹性阵)。在样条有限元条法分析吊桥固有振动的基础上,进一步计算吊桥的颤振频率和临界风速。以旧Tacoma桥为例,计算结果与现场实测值相一致。

 
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