动剪切模量与阻尼比的变化比较小。
冻土的动阻尼比随频率的增加或温度的降低而减小。
Dynamic damping ratio of frozen soil decreases with increment of frequency or decrement of temperature.
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。
The influence of consolidation stress ratio on damping ratio is not distinct.
提出利用相邻波峰和波谷之间距离估计阻尼比的割线方法。
A new damping estimation method, the secant line method, was presented, that is based on the distance of neighbor peaks and valley of oscillation.
以二阶欠阻尼控制系统的设计为例，优化出系统的最佳阻尼比。
An example of finding optimal damped ratio in second order underdamped control system is given.
摘要提出利用相邻波峰和波谷之间距离估计阻尼比的割线方法。
A new damping estimation method, the secant line method, was presented, that is based on the distance of neighbor peaks and valley of oscillation.
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 optimum parameters include the optimum frequency spacing, average damping ratio, and tuning frequency ratio.
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。
It is found that the asymmetric stiffness and large damping ratio will both enhance the threshold of stability.
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。
Third, a new structure of PID control reduces the damping ratio of the control system.
采用自由振动法测试得到了一批橡胶混凝土小变形阻尼比的基础性数据。
Free vibration method is employed to measure the damping ratio. A great deal of fundamental data for the damping ratio of rubber powder concrete in small deformation is obtained.
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 proposed model takes into account the shear modulus, the damping ratio, pore water pressure and permanent deformations of pavement foundation materials.
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 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.
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。
Different closed loop poles are selected according to the damping ratio and dead time, and simple formulas are provided for the calculation.
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 effect of stiffness constant, viscosity damper coefficient and variable mass on the damped frequency and the relative damping ratio of the system were studied.
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。
Moreover, this paper analyses the shear strain and compressive stress and loading frequency dependence of the damping ratio.
通过理论计算及试验模态分析，研究了磁悬浮阻尼器参数对系统弯曲模态阻尼比的影响。
Influence of the magnetic damper on bending modal damping of the system is studied by theoretical and experimental modal analysis.
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 results show that modal damping ratio of cable system with MR damper is more increased, it has well effect of mitigating vibration.
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。
This paper analyzes the effect of different soil damping ratio, fastener stiffness and support stiffness to the dynamic responses of the track tunnel structures.
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。
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.
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 influence of systematic parameters on the structural equivalent damping ratio is analyzed for purely torsional vibration.
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。
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.
对于采用较高阻尼比减振器的系统，或者要工作于共振区附近的系统，该公式具有重要意义。
It is important if you use the dampers with high damping factor or if the dampers work in the resonant region of the system.
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；
The equivalent damping ratio and stiffness coefficient of the LED device are studied, and the general equivalent formula of energy dissipation devices is established.
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 pounding force spectra after given damping ratio, interval, and time delay, were plotted according to the natural frequencies.
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。
Methods of increasing damping radio are introduced for fluid power system, and the pneumatical proportional servo system with variable damping ratio is put forward.
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。
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.
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 dynamic shear modulus ratio and damping ratio of soil are indispensability for seismic safety evaluation and soil layer seismic response analysis of engineering sites.
本文根据原型振动实测的位移记录，应用时间域识别法，求得了结构的前几阶模态的固有频率和阻尼比。
Some modal natural frequencies and damping coefficients of a structure are derived by means of in-sita testing displacement records and the time domain identification technique.
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。
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。
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.
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