ESTIMATION CURVE FOR MODAL DAMPING IN STAY CABLES WITH VISCOUS DAMPER
ESTIMATION CURVE FOR MODAL DAMPING IN STAY CABLES WITH VISCOUS DAMPER
复制标题
DOI：
10.1061/(asce)0733-9445(1993)119:6(1961
复制
发表时间：
1993-06
期刊：
影响因子：
--
通讯作者：
Benito M. Pacheco;Y. Fujino;A. Sulekh
中科院分区：
文献类型：
--
作者：
Benito M. Pacheco;Y. Fujino;A. Sulekh
为了简化斜拉索粘滞阻尼器的设计过程，提出了一种通用的估算曲线，该曲线将带阻尼器的斜拉索的模态阻尼比、模态数、阻尼器尺寸、阻尼器位置以及斜拉索的三个参数（跨度、单位长度质量和基频）联系起来。该曲线是通过对锚固附近带有单个阻尼器的张紧索进行复特征值数值分析获得的，并将这些参数明智地分组为无量纲因子。几个数值例子说明了方便使用这种设计援助，以及显示所需的阻尼器的大小和位置的实际值和预期的附加阻尼在前几个模式。要达到的阻尼通常足够高，以抑制大多数由风引起的振动。然而，应注意的是，缆索的小下垂和阻尼器的轻微非粘性特性可能会降低阻尼器的有效性。修改后的设计曲线可能必须包含…
To simplify the procedure of designing viscous dampers for stay cables in bridges, a universal estimation curve is proposed that relates the modal damping ratio of the cable with attached damper, the mode number, the damper size, the damper location, and three parameters of the cable: span, mass per unit length, and fundamental frequency. The curve is obtained from numerical complex‐eigenvalue analysis of a taut cable with a single damper near the anchorage, with judicious grouping of these parameters into nondimensional factors. Several numerical examples illustrate the convenient use of this design aid, as well as show realistic values of the required damper size and location and the expected additional damping in the first few modes. The damping to be attained is usually high enough to suppress most vibrations induced by wind. However it is noted that a small sag of the cable and slight nonviscous properties of the damper may reduce the damper effectiveness. A modified design curve may have to incorpor...