ratio of damping

Research on analytical methods of embedment effect on stiffness and damping ratio for machine foundations

埋置动力机器基础地基刚度和阻尼比分析方法研究

The negative-velocity feedback strategy and the optimization criterion of equivalent damping ratio are adopted.

采用负速度反馈控制策略及等效阻尼比优化准则.

Through the analyses of mathematics and mechanics this paper obtained a relationship between the uniformity coefficient AC of critical movement and the damping ratio ξ of motion system while the rotating parts revolve at low speed.

本文通过数学力学分析，得出了转动部件低速转动时临界运动均匀性系数AC与运动系统阻尼比ξ的关系。

An example of the first failure time analysis of a linear SDOF system excited by a quadratic forcing function shows the applicability of the method proposed and reveales the influence of the damping ratio of the system on its first failure.

二次力函数激励下线性SDOF系统的首次失效时间分析，说明了该方法的使用过程，并揭示了系统阻尼对首次失效的影响。

Theoretic analysis of dynamic response of free sites and dynamic triaxial test on dynamic modulus and damping ratio of soils are carried out, as a part of the project aided by nature science national fund, analysis of soil-foundation-structure dynamic interaction ( NO.50278033).

结合国家自然科学基金课题《地基-基础-上部结构相互作用体系动力特性研究》（NO.50278033），本文进行了自由场地动力反应理论分析和场地土动力特性试验研究。

Variable Damping Ratio Control of Servo System by Fuzzy Adaptive Adjust PID

随动系统的模糊自适应整定PID变阻尼控制

Moreover, the ductility level, damping ratio and natural period of systems produce important effects on the energy spectra of bilinear SDOF systems, and the effect of yield stiffness ratio can be neglected.

体系延性系数、阻尼比、自振周期是影响双线性SDOF体系能量谱的重要因素。

With analysis of professional software DASP, natural vibration frequency ( period)、 vibration mode and damping ratio of model structure with not sealing top and sealing top are obtained, and then analyze the the change rule of the dynamic characteristics after the two tests. 3.

利用专业软件DASP分析试验结果，得到模型结构在未封顶、封顶两种情况下的自振频率（周期）、振型和阻尼比，进而分析出两次试验后动力特性的变化规律。

An experimental research on dynamic shear modulus and damping ratio of loess in Dongpo area, Shaanxi Province

陕西东坡地区原状黄土动剪切模量及阻尼比的试验研究

Mode, natural frequency and damping ratio of test results are obtained.

得到了复合墙板的振型、固有频率和阻尼比等试验结果。