查询词典 vibration period

Obtaining the displacement of vibration, the velocity and acceleration are directly computed by differentiation matrices. The period of nonlinear vibration is computed by barycentric Lagrange interpolation collocation method.

计算得到振动位移后，采用微分矩阵和重心Lagrange插值计算非线性振动的速度、加速度和振动周期。

A method considering fundamentalperiod of the principal axis for the structural vibration period restraint has been put forward.

各向异性介质中的场地微动理论与应用研究，具有一定的创新性。

We spread the feeling machine to study the simple pendulum vibration period with a 霍 of switch 尔, perfect the diagraph of the gravity acceleration;We will gather a 霍 of switch 尔 spreads the feeling machine to used for measuring the spring coil to flap the son makes JIAN3 XIE2 vibration of period, further tested to find out inertial quantity of the object;New gather a 霍 of switch 尔 spreads the feeling machine to provided a kind of precision to measure the 磁 damping coefficient and new method of the glide coefficient of friction of the materials that the magnetism slips the piece for us;Gather a 霍 of switch 尔 spreads the feeling machine and can also used for the verification machine can guard the 恒 laws etc.

我们传布了感觉机器用开关尔的霍学习简单的钟摆震动时期，使地心引力加速的分度尺完美；我们将会聚集开关尔的霍传布感觉机器到为测量要拍打儿子的卷作时期的 JIAN3 XIE2 震动的春天用，更进一步测试发现物体的不活泼的量；新的聚集开关尔的霍传布感觉以机器制造提供一种精密测量磁湿气磁性滑倒块的材料摩擦的滑动系数的系数和新的方法因为我们；聚集开关尔的霍传布感觉机器和罐子也用因为确认机器能及其他保卫恒法律。

Considered the factor of damping,a single degree of freedom s dynamic model of the high-speed cam mechanism is established.Choosing the law of sine acceleration motion as the excitation function,a displacement and acceleration dynamic response equations of the main vibration phase and residual vibration phase,the working dynamic response change curve through the inferential reasoning working end movement equation is derived.The result is obtained that different period and damping ratio have different impact

建立了考虑阻尼因素的等效单自由度高速凸轮机构的动力学模型，以正弦加速度运动规律方程为激振函数，推导出了从动件系统主振段和余振段的位移和加速度动态响应方程并绘制出了动态响应变化曲线，得出了不同阻尼比和周期比对主振段和余振段的动态响应，从而为高速凸轮机构的合理设计提供了一定的理论依据。

The concept of influence degree of natural vibration period by cables is shown,and the influence of cables to the property of natural vibration of extradosed cable-stayed bridge s is analyzed by taking Xiaoxihu extradosed cable-stayed bridge in Lanzhou City as an example.

以小西湖矮塔斜拉桥为例，通过引入拉索自振频率影响度的概念，分析了拉索的存在对矮塔斜拉桥自振特性的影响，探讨了矮塔斜拉桥的自振特性与相应连续梁桥的区别；在分析矮塔斜拉桥地震反应的基础上，通过引入振型贡献率的概念，分析了高阶振型对矮塔斜拉桥动力性能的影响；分析了矮塔斜拉桥的振型耦联效应。

In addition,there were three sub-assemblages ploted out in the Atlantic period,Sub-Boreal period and Sub-Atlantic period,which reflected the less vibration of the large-scale climatic change.

对鹤鸣孔的大西洋期、亚北方期和亚大西洋期各划分出了两个孢粉组合亚带，反应了大气候环境下气候的次一级波动。

Through the analysis and contrast between HM core and Dh core, combined with the data of AMS14C, six pollen assemblages were ploted Out. At the mean time, six stages about the vegetation change and climate fluctuation were rebuild. In addition, there were three sub-assemblages ploted out in the Atlantic period, Sub-Boreal period and Sub-Atlantic period, which reflected the less vibration of the large-scale climatic change. Pollen assemblage dominated by Concentricystes in the hard and green clay of late Pleistocene can make it sure that the hard green clay layer was formed by water.

通过对上海地区鹤鸣孔和东海1井两个钻孔进行孢粉分析鉴定和对比，结合AMS14C测年等资料，划分出了6个孢粉组合带，恢复了本区的植被演化和气候波动的6个阶段，对鹤鸣孔的大西洋期、亚北方期和亚大西洋期各划分出了两个孢粉组合亚带，反应了大气候环境下气候的次一级波动，在晚更新世晚期的硬绿色粘土中还发现了以环纹藻为主的孢粉组合，从孢粉学角度上证实了这一硬绿色粘土层&水成沉积&的观点。

The natural vibration period of structure,story drift, variation characteristics of story lateral displacement,stiffness,energy dissipation feature and investment-income of the three structural schemes of eccentric braced steel frame,knee braced steel frameand moment resisting steel frameare compared.

偏心支撑、隅撑支撑钢框架通过耗能梁段发生剪切屈服耗能，大震下既能提供足够的刚度，又能保证一定的延性，具有较强的耗能能力，是高烈度地震区理想的结构体系s。'〕。

Secondly, to analyze seismic response of the concrete gravity dam, subspace iterative method was applied to compute free vibration period of the dam, time integration method was builtup for the seismic time history analysis and formulation of coupled vibration of reservoir water and dam were also deduced.

其次，针对混凝土重力坝的地震响应分析问题，采用子空间迭代法计算了大坝的自振周期，建立了地震时程分析的逐步积分方法，并且推导了库水和坝体耦合振动的理论公式。

The main research contents are as follows:1. Through massive calculation, analysis and comparison, sum up the similarities and differences between the special-shaped cross sections and rectangular cross sections in mechanical features, between reinforced concrete special-shaped columns and rectangular columns in load-bearing capacity, ductility performance and provide necessary basic concepts and data for further understanding the characteristics of the special-shaped columns;2. Through massive elastic calculations and elasto-plastic analysis, under the preconditions of satisfying the code's requirements for axial compression ratio, limit value of lateral displacement and load-bearing capacity of normal section,oblique section and beam-column joint, under circumstances of different intensity of earthquake, structure dead weight, sort of site and column grid bay dimension, the variation regularity of maximum suitable height of structure, and thus sum up the maximum suitable height of structure for code for the purpose of macro-control while deciding the design scheme;3. Make a preliminary study on the stress feature of reinforced concrete special-shaped column and Z-shaped column of which the ratio of limb length to limb thickness is between 4~5 ,and the preliminary design method is suggested;4. Through elato-plastic time history dynamic analysis of typical projects, check up the weak storey of the special-shaped column structure and yielding, breaking and collapse mechanism to satisfy the earthquake resistant requirement to buildings of remaining stand under strong earthquake;5. Derive for project use simplified calculation formula of vibration period, suitable vibration period, suitable rigidity of special-shaped column structure through theoretical analysis, and provide an easy and practical method for deciding the structure scheme economically, safely and reasonably;6. Based on the study achievements in theory and massive analysis and calculations of this paper, sum up the regularities of inner force, deformation of special-shaped column structure and seismic conceptual design, and thus the suggection of seismic design of special-shaped column structures is presented.

本文研究的主要内容如下：通过大量的计算、分析和对比，总结出异形截面与矩形截面在力学特性、钢筋混凝土异形截面柱与矩形截面柱在承载能力、延性性能等方面的异同，为深入了解异形截面柱的特点提供必要的基本概念和数据；通过大量的弹性及弹塑性计算分析，在满足规程对轴压比、侧移限值及正截面、斜截面、节点承载力抗震验算要求的前提下，在不同抗震设防烈度、结构自重、场地类别及柱网开间尺寸情况下最大适宜高度的变化规律，并在此基础上总结归纳出异形柱结构的最大适用高度规定，可用于规程，以便于在确定方案时起到宏观控制的作用；对肢长与肢厚比在4～5的钢筋混凝土异形截面柱及Z形柱的受力特点进行初步探讨，提出初步的设计方法；通过对典型工程的弹塑性动力时程分析，检验异形柱结构的薄弱层及屈服、破坏、倒塌机制，以达到建筑物大震不倒的抗震设防要求；通过理论分析，推导出异形柱结构自振周期，以及适宜自振周期、适宜刚度的工程实用简化计算公式，为经济、安全、合理地确定结构方案提供简便实用的方法；在本文理论分析、计算以及大量的研究成果基础上，总结归纳出异形柱结构内力、变形的规律及抗震概念设计内容，并在此基础上提出异形柱结构的抗震设计建议。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了