防振锤抑制拉索振动的仿真分析与试验研究

发布时间：2018-08-26 16:44

【摘要】：针对目前斜拉桥拉索减振方法的不足,提出利用防振锤抑制拉索振动的思路。为验证该方法的有效性,本文分别建立了拉索和防振锤的运动方程,并采用振型叠加法建立与其对应的广义坐标方程,采用状态空间法建立与其对应的状态方程,运用SIMULINK仿真系统对拉索进行了动力仿真分析。设计了相应的室内试验,进行了拉索-防振锤组合系统试验,并利用SIMULINK对试验进行了相同参数的仿真分析,对比验证了防振锤减振的有效性。仿真结果与试验结果对比发现,作为拉索减振装置防振锤减振效果较为显著,对于防振锤的设计应使其振动频率与拉索振动频率相一致、安装质量不宜过小、阻尼不宜太大、且宜安装在拉索振幅较大处。研究结果表明:防振锤抑制拉索的振动是有效的,利用防振锤装置抑制超长拉索振动是可行的。
[Abstract]:In view of the deficiency of the current cable vibration absorption method of cable-stayed bridge, the idea of using anti-vibration hammer to suppress the cable vibration is put forward. In order to verify the validity of the method, the motion equations of cable and anti-vibration hammer are established, and the corresponding generalized coordinate equations are established by the mode superposition method, and the corresponding state equations are established by the state-space method. The dynamic simulation analysis of cable is carried out by using SIMULINK simulation system. The corresponding indoor test was designed and the test of the cable-anti-shock hammer system was carried out, and the simulation analysis of the same parameters was carried out by using SIMULINK, and the effectiveness of the anti-vibration hammer was compared and verified. Comparing the simulation results with the test results, it is found that as a cable damping device, the anti-vibration effect of the hammer is more remarkable. The design of the anti-vibration hammer should make its vibration frequency consistent with the vibration frequency of the cable, and the installation quality should not be too small and the damping should not be too large. And should be installed in the cable amplitude larger. The results show that the anti-vibration hammer is effective to suppress the vibration of the cable, and it is feasible to use the anti-vibration hammer device to suppress the vibration of the super-long cable.
【作者单位】：河北工业大学土木与交通学院;河北省土木工程技术研究中心;
【基金】：国家自然科学基金项目(50808063) 天津市交通运输委员会科技发展项目计划(2016A-07)~~
【分类号】：U441.3;U448.27

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