基于替代试件模型的振动台迭代控制仿真分析  

Simulation analysis of shaking table iterative control based on surrogate specimen model

作　　者：王贞 陆文龙 吴斌 贾学军 WANG Zhen;LU Wenlong;WU Bin;JIA Xuejun(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;China Construction Second Engineering Bureau Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070 [2]中国建筑第二工程局有限公司,湖北武汉430070

出　　处：《地震工程与工程振动》2024年第4期37-45,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金面上项目(52078398);海南省重大科技计划项目(ZDKJ2021024)。

摘　　要：试件-台面相互作用会显著影响振动台加速度时程复现精度,迭代控制常常成为提高试验数据可靠性的重要手段。然而,砌体、钢筋混凝土等结构易于因开裂而进入非线性力学状态,往往不适合迭代加载。文中开展了基于替代试件模型的振动台迭代控制方法仿真研究,先构建一个与试件动力特性相近的替代试件模型,利用替代试件模型完成振动台迭代加载获得驱动命令后,再开展真实试件的振动台试验。仿真结果表明:基于替代试件模型的振动台迭代控制有效降低了试件-振动台相互作用对系统控制性能的影响,实现了台面加速度时程的高精度复现。The specimen-table interaction effects can significantly affect the accuracy of shaking table acceleration time history.Iterative control is often an important means to improve the reliability of test data.However,masonry,reinforced concrete and other structures are prone to enter the nonlinear mechanical state due to cracking,which is often not suitable for iterative loading.A simulation study is carried out on the iterative control method of the shaking table based on the surrogate specimen model.First,a surrogate specimen model with similar dynamic characteristics to the specimen was constructed,after completing the iterative loading of the shaking table and obtaining the driving command with the surrogate specimen model,a real specimen-shaking table test was carried out.The simulation results show that the shaking table iterative control based on the surrogate specimen model effectively reduces the influence of the specimen-table interaction on the system control performance,and realizes the high precision reproduction of the acceleration time history of the table.

关 键 词：振动台 试件-台面相互作用 替代试件模型 迭代控制 

分 类 号：P315.9[天文地球—地震学]