Real-Time Hybrid Simulation Using Shake Tables and Dynamic Actuators
Real-Time Hybrid Simulation Using Shake Tables and Dynamic Actuators
复制标题
DOI：
10.1061/(asce)st.1943-541x.0000314
复制
发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
X. Shao;A. Reinhorn;M. Sivaselvan
中科院分区：
文献类型：
--
作者：
X. Shao;A. Reinhorn;M. Sivaselvan
介绍了实时混合模拟（RTHS）的发展和实现，RTHS是一种数值计算与振动台和辅助驱动器激励的物理试件相结合的地震反应模拟方法。要模拟的结构被分成一个或多个实验和计算子结构。在实验和计算子结构之间的界面处由地震激励产生的载荷，就加速度和力而言，由振动台和致动器以实时速率逐步施加。实验子结构的实测位移和速度响应被反馈以确定下一时间步的加载命令。上述混合仿真方法的独特之处在于惯性力和基于力的子结构的通用实现。RTHS的一般配方，使这种混合仿真方法被执行为实时伪动态（PSD）测试，动态测试，以及两者的组合，这取决于实验室测试设备的可用性和它们的能力。文中给出了一般公式的推导过程和相应的测试系统。对一个三层结构模型的RTHS进行了数值模拟和物理试验。仿真和实验结果验证了所提出的RTHS通用公式的概念和开发相应的控制器平台的可行性。
The development and implementation of the real-time hybrid simulation (RTHS), a seismic response simulation method with a combination of numerical computation and physical specimens excited by shake tables and auxiliary actuators, are presented. The structure to be simulated is divided into one or more experimental and computational substructures. The loadings generated by the seismic excitations at the interfaces between the experimental and computational substructures, in terms of accelerations and forces, are imposed by shake tables and actuators in a step-by-step manner at a real-time rate. The measured displacement and velocity responses of the experimental substructure are fed back to determine the loading commands of the next time step. The unique aspect of the aforementioned hybrid simulation method is the versatile implementation of inertia forces and a force-based substructuring. The general formulation of RTHS enables this hybrid simulation method being executed as real-time pseudodynamic (PSD) testing, dynamic testing, and a combination of both, depending on the availability of the laboratory testing equipment and their capacity. The derivation of the general formulation and the corresponding testing system are presented in this paper. Numerical simulation and physical experiment were conducted on the RTHS of a three-story structural model. Simulation and experimental results verify the concept of the proposed general formulation of RTHS and the feasibility of the developed corresponding controller platform.