In physics, zeta can represent a damping ratio.

在物理学中，zeta（希腊字母表的第六个字母）可以表示阻尼比。

It is not consistent with damping mechanism and full - scale data of damping ratio of buildings.

目前结构设计阶段通常取阻尼比为常数,这不能真实反映建筑物的阻尼机理,与阻尼比的实测结果也有很大的差距.

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。

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 reasonable damping ratio of isolation system is about 20% to 30%.

同时，隔震层阻尼比设计在20%-30%左右较为合理。

Difference of damping ratio for different modes decreased with the prestress.

预应力水平越高，各阶模态对应的阻尼比相差越小；

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。

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.

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 show: particle damper enables the damping ratio to reach up to 492%;

研究结果表明：颗粒阻尼可以使得梁的阻尼比最大增加到492%；