Shear modulus and damping ratio change very little.
动剪切模量与阻尼比的变化比较小。
The subsequent experiments on a piezoelectric beam show that the structural modal damping ratio can be promoted significantly.
压电悬臂梁的实验表明，它们能使结构模态阻尼比大幅提高。
The equivalent viscous damping ratio and the equivalent natural frequency are obtained by comparing the system with a purely linear, spring-mass-damper system of single freedom.
通过和单自由度线性弹簧-质量-阻尼系统进行比较，得到该带裂缝梁结构的等效自然频率和等效粘滞阻尼比。
The damping ratio is an important characteristic parameter in a second-order system, which has great effect on the dynamic characteristic of the second order system.
阻尼比是二阶系统的一个重要的特征参数，它对二阶系统动态特性有较大的影响。
It is found that the asymmetric stiffness and large damping ratio will both enhance the threshold of stability.
研究表明支承刚度的不对称和大阻尼比都将提高转子稳定性的门槛值。
By the analysis penetration of ZnOw into the compound board will compose a microscopic damping structure, which can reduce the vibration frequency and increase the damping ratio.
分析认为，氧化锌晶须渗入在复材中将形成微观的阻尼结构，起到降低固有振动频率和增大衰减率的作用。
The results show that modal damping ratio of cable system with MR damper is more increased, it has well effect of mitigating vibration.
试验结果显示系统的模态阻尼比在安装磁流变阻尼器后有大幅增长，具有良好的减振效果。
The natural frequency, damping ratio and mode shape of a multi-degree-of-freedom system are analyzed and the identified results are in good agreement with the theoretical values.
并针对一多自由度系统具体论述了固有频率、阻尼比和振型的识别方法，识别结果与理论结果吻合较好。
Different closed loop poles are selected according to the damping ratio and dead time, and simple formulas are provided for the calculation.
按照阻尼比和模型的延迟时间选择不同的闭环极点，并且为计算提供了简单的公式。
Dynamic damping ratio of frozen soil decreases with increment of frequency or decrement of temperature.
冻土的动阻尼比随频率的增加或温度的降低而减小。
The optimum parameters include the optimum frequency spacing, average damping ratio, and tuning frequency ratio.
最优参数包括最优频率间隔、最优平均阻尼比和最优调谐频率比。
The dynamic shear modulus ratio and damping ratio of soil are indispensability for seismic safety evaluation and soil layer seismic response analysis of engineering sites.
土的动剪切模量比和阻尼比是工程场地地震安全性评价工作和土层地震反应分析中不可缺少的重要参数。
The effect of stiffness constant, viscosity damper coefficient and variable mass on the damped frequency and the relative damping ratio of the system were studied.
研究了系统刚度、粘性阻尼系数尤其是变质量等参数对系统固有频率和阻尼比的影响。
Moreover, this paper analyses the shear strain and compressive stress and loading frequency dependence of the damping ratio.
另外，对叠层橡胶支座的阻尼比随剪应变、压应力及荷载频率的变化情况进行了分析。
Third, a new structure of PID control reduces the damping ratio of the control system.
变结构的张力控制可以减小过程中的阻尼比的变化幅度，提高稳定性。
The proposed model takes into account the shear modulus, the damping ratio, pore water pressure and permanent deformations of pavement foundation materials.
该模型可以全面考虑路基材料的剪切模量、阻尼比、孔隙水压力以及永久变形。
The equivalent damping ratio and stiffness coefficient of the LED device are studied, and the general equivalent formula of energy dissipation devices is established.
研究了将铅挤压阻尼装置等效成阻尼比和刚度系数的方法，建立了消能装置的通用等效计算公式；
Through the optimum searching, one may obtain the optimum frequency spacing, average damping ratio, tuning frequency ratio, and corresponding index representing the control effectiveness of MTMD.
通过最优搜寻可得MTMD的最优频率间隔、平均阻尼比、调谐频率比和相应的无量纲控制有效性指标。
Theeffect of moisture content and stress conditions to the damping ratio of Xi'anloess are also discussed.
对西安黄土还探讨了不同湿度、应力状态对阻尼比特性的影响。
Methods of increasing damping radio are introduced for fluid power system, and the pneumatical proportional servo system with variable damping ratio is put forward.
介绍了流体动力系统常用的提高阻尼比的方法，提出了可调液压阻尼器的变阻尼气压比例伺服系统。
The influence of consolidation stress ratio on damping ratio is not distinct.
但固结应力比与有效围压应力对阻尼比之影响则较不明显。
With the aid of the method for determining damping ratio in structural dynamic experiment the so called stationarity index is used to estimate the gentleness of the peak's slope.
借助结构动力试验中阻尼比的确定方法，提出用平稳度指数来评价单峰点包线函数平缓程度。
In order to analyze the global system of steel lattice shells and concrete supporting structures, the simplified formula of damping ratio of the systems composed of different materials was derived.
针对钢网壳及混凝土支承体系这类组合结构，论文首先推导出不同材料组合结构阻尼比的实用计算公式。
The objective function for GA takes damping ratio as its variable .
所得到的阻尼比作为大扰动下控制效果的评估指标。
The influence of systematic parameters on the structural equivalent damping ratio is analyzed for purely torsional vibration.
对结构纯扭转的振动问题进行研究，分析了控制系统各参数对控制后结构等效阻尼比的影响。
On the basis of the formulae and in the consideration of the damping ratio of tall steel structure, the design parameters were given for the engineering design using iterative technique.
据此并考虑钢结构的阻尼比，运用数值迭代寻优技术，得到了可供工程设计采用的设计参数。
In this paper, the method of determining damping ratio by comparing MEM spectrum is discussed and the shortcoming of this method is pointed out.
本文指出了利用MEM谱值比较求多自由度结构模态阻尼比方法的一些不足。
At the same strain level, the damping ratio of LCES is smaller than soft clay's, and it decreases to a quite low level with high cement content and low EPS content.
在相同的动应变水平下，LCES的阻尼比比粘土要小，提高水泥含量并降低EPS颗粒含量后，LCES的阻尼比显著减小。
The effect of systematic parameters on the structural equivalent damping ratio in translational and torsional direction is studied for torsionally coupled vibration.
对结构扭转耦联的振动问题进行研究，分析了控制系统各参数对结构平移等效阻尼比和扭转等效阻尼比的影响。
Studies on the influences of the structural damping ratio on the performance of MTMD are carried out employing the defined assessment criteria.
基于定义的评价准则，研究了结构阻尼比对MTMD性能的影响。
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