摘要
为验证基于负刚度效应的阻尼器对斜拉索减振效果的提升作用,开展了磁致负刚度阻尼器和黏滞阻尼器数值仿真分析研究。研究结果表明:建立的耦合系统(对拉索抗弯刚度和垂度忽略不计)基于MATLAB/Simulink仿真分析可实现磁致负刚度阻尼器对斜拉索附加模态阻尼比的精准求解;该系统的附加阻尼比可直观表征负刚度对斜拉索减振效果的提高程度;不同的负刚度系数对减振效果影响较大,主要体现在斜拉索的附加阻尼比、跨中位移幅值等方面。
In order to verify the improvement of damping effect of the damper based on negative stiffness effect on stay cable,numerical simulation analysis of magnetically induced negative stiffness damper and viscous damper was carried out.The results show that the coupled system(the cable bending stiffness and sag are ignored)based on MATLAB/Simulink simulation analysis can accurately solve the additional modal damping ratio of the magnetic negative stiffness damper to the cable.The additional damping ratio of the system can directly represent the improvement degree of negative stiffness to the damping effect of the cable.Different negative stiffness coefficients have great influence on damping effect,which is mainly reflected in the additional damping ratio and mid-span displacement amplitude of the stay cable.
作者
张燕娇
郑梦斐
张敏
韩思思
宋帅杰
Zhang Yanjiao;Zheng Mengfei;Zhang Min;Han Sisi;Song Shuaijie(North China University of Water Resources and Electric Power,Zhengzhou 450040,China;Beijing Jiaotong University,Beijing 100091,China)
出处
《科学技术创新》
2022年第18期141-144,共4页
Scientific and Technological Innovation
基金
国家级大学生创新训练计划项目支持(202110078012)。
关键词
斜拉索
磁致负刚度阻尼器
黏滞阻尼器
振动控制
Stay cable
Magnetic negative stiffness damper
Viscous damper
Vibration control
