采用等效力控制方法的非线性结构实时子结构试验  

Real-time substructure testing of nonlinear structures with equivalent force control method

作　　者：许国山[1] 吴斌[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《振动工程学报》2010年第3期237-242,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金(90715036)资助项目;地震行业科研专项经费资助项目(20084190731)

摘　　要：等效力控制方法用反馈控制代替数学迭代过程求解实时子结构试验隐式逐步积分方法的非线性方程。对于非线性结构试验,采用比例-微分(PD)控制器的等效力控制方法会使等效力响应产生稳态误差,从而使试验结果失真。文章用比例-积分(PI)控制器代替PD控制器以解决此问题。介绍了实时子结构试验等效力控制方法,进行了等效力控制器设计,并通过数值模拟和试验验证了采用PI控制器的等效力控制方法对非线性结构实时子结构试验的有效性。数值模拟与试验的结果都表明,对于非线性体系的试验,采用PI控制器的等效力控制方法可以取得非常好的效果。The equivalent force control method（EFC） replaces numerical iteration with feedback control strategy to solve the nonlinear equations of motion for real-time substructure testing with implicit integration method.For nonlinear structural tests,the EFC method with proportional-derivative（PD） controller will induce control errors in the equivalent force response and lead to inaccurate results.This paper chooses the proportional-integral（PI） controller,instead of the PD controller previously used,to eliminate the errors.The EFC method for real-time substructure test was introduced in this paper firstly,then the equivalent force controller was designed,and the effectiveness of the EFC method with PI controller for real time-substructure tests of nonlinear structures was verified with numerical simulations and actual tests.The numerical and experimental results have shown that the EFC method with a PI controller is very effective for nonlinear structural tests.

关 键 词：实时子结构试验 等效力控制方法 比例-积分控制器 非线性结构 

分 类 号：TU317[建筑科学—结构工程]