Shear modulus and damping ratio change very little.
动剪切模量与阻尼比的变化比较小。
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 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。
Contrast quivalent dynamic shear modulus and damping ratio of different soil types.
最后分析了同类土静、动强度参数之间的比例关系；
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。
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。
Stayed cable is very vulnerable to vibration as it is with low rigidity, low damping ratio and light weight.
由于斜拉索刚度小、阻尼低、质量轻，极易发生振动。
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。
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 results showed that the fluctuating amplifying coefficient evidently reduces with the increase of damping ratio.
结果表明，结构阻尼比增大，风振脉动增大系数明显减小。
For the bridge with low damping ratio, the damping ratio will have little influence on the dynamic response of the bridge.
阻尼比较小的桥梁，阻尼比对其动力响应影响较小。
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。
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。
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 pounding force spectra after given damping ratio, interval, and time delay, were plotted according to the natural frequencies.
针对阻尼比、间隔距离、时间迟滞，计算了不同的固有频率下的碰撞力峰值，绘制出碰撞力响应谱。
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 conclusion is that the damping ratio will increase, and the nature frequency will decrease along with the number of knots mounting up.
结论是：随着节子个数的增加，木材振动模态的阻尼比增大，而其固有频率减小。
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。
The dynamic behaviour of the pile is presented as frequency response curves for displacement, stiffness, dashpot constant and damping ratio.
桩的动力特性用刚度、阻尼和位移的频率响应曲线来表达。
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。
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。
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。
This paper analyzes the effect of different soil damping ratio, fastener stiffness and support stiffness to the dynamic responses of the track tunnel structures.
并且进一步分析了不同土体阻尼比、扣件刚度、支座刚度对轨道隧道结构的动力响应影响。
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。
The system's global characters are obtained under different input torque fluctuation, backlash, composite transmission error, exciting frequency and damping ratio.
得到了系统在不同的输入转矩波动、齿侧间隙、齿轮综合误差、激励频率和阻尼比参数下系统的全局特性。
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。
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 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。
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。
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；
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