隔震桥实时混合试验的稳定性和精确性分析

发布时间：2018-09-12 11:48

【摘要】：为研究隔震桥梁实时混合试验的稳定性和精确性,以加有摩擦摆和粘滞阻尼器的隔震桥的试验室比例模型为研究对象,以粘滞阻尼器为试验子结构,安装摩擦摆的隔震桥为数值子结构,进行实时混合试验,通过考虑摩擦摆的强非线性,理论分析了振幅误差和时滞误差对试验系统稳定性和精确性的影响,最后通过试验验证理论分析结果。理论分析和试验结果都表明,对于加有粘滞阻尼器的隔震桥系统,基于α法的数值积分的实时混合试验系统满足稳定性和精确性要求。具体而言,作动器振幅误差不会影响系统稳定性,仅仅相当于增加或减小系统的阻尼;而作动器时滞小于0.012 s时,系统是稳定的。该研究对于足尺隔震桥的实时混合试验具有相当的指导意义。
[Abstract]:In order to study the stability and accuracy of real-time hybrid test of isolated bridge, the laboratory proportional model of isolated bridge with friction pendulum and viscous damper is taken as the object of study, and the viscous damper is used as the experimental substructure. The vibration isolation bridge with friction pendulum is a numerical substructure, and the real time mixing test is carried out. Considering the strong nonlinearity of the friction pendulum, the effects of amplitude error and delay error on the stability and accuracy of the test system are analyzed theoretically. Finally, the theoretical analysis results are verified by experiments. The theoretical analysis and experimental results show that for the isolated bridge system with viscous dampers, the real-time hybrid test system based on the numerical integration of 伪 method meets the requirements of stability and accuracy. In particular, the amplitude error of the actuator does not affect the stability of the system, which is only equivalent to increasing or reducing the damping of the system, and the system is stable when the delay of the actuator is less than 0.012 s. This study is of great significance for the real-time mixed test of full-scale isolated bridges.
【作者单位】：桂林电子科技大学建筑与交通学院机电工程学院;广西大学土木建筑工程学院;工程防灾与结构安全教育部重点实验室广西防灾减灾与工程安全重点实验室广西大学;福建江夏学院;广州大学工程抗震研究中心土木工程防灾国家重点实验室(培育);
【基金】：国家自然科学基金西部地区基金资助项目(51468010);国家自然科学基金面上项目(51408142) 广州市属高校“羊城学者”项目(1201541630)
【分类号】：U442.55

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