基于Matlab-OpenSEES混合编程的子结构试验系统

Substructure Testing System Based on Mixed Programming of Matlab and OpenSEES

利用Matlab的强大矩阵运算功能、以及OpenSEES的开源特性,采用混合编程方法,建立了基于MatlabOpenSEES的子结构混合模拟试验系统.详细介绍了子结构混合模拟系统的组成及其原理,即Matlab模块、OpenSEES数值子结构模拟模块以及两者的接口.其中,Matlab模块主要实现运动方程计算、试验子结构加载控制以及数据采集功能;OpenSEES数值子结构模拟模块为子模块,实现子结构的数值模拟分析,供Matlab模块调用;接口可通过读写文本或Socket通信变量实现两者数据传输.该系统可以直接在外接的计算机上编程独立实现,再通过数据采集卡与电液伺服设备控制系统硬件的I/O(输入/输出)通道连接即可,从而避开了设备控制系统复杂的底层编程技术,减少了对控制系统本身的要求,降低了试验难度和费用.通过3个大比例尺结构试验模型的系统子结构混合模拟试验结果,验证了所提出的子结构试验系统的可行性.

Utilizing the powerful matrix calculating function from Matlab and the open-source characteristics from OpenSEES, this paper proposes a substructure testing system based on Matlab-OpenSEES by adopting mixed programming.It introduces three basic components, which are the Matlab module, the OpenSEES numerical substructure simulation module and the interface function between Matlab and OpenSEES, and the principle of the proposed substructure system. The Matlab module is used to realize the function of solving motion equation, the loading control, and data acquisition of experimental substructure. The OpenSEES numerical substructure simulation module, which is a sub- module called by Matlab module, is used to realize the numerical simulation analysis of numerical substructure. The interface is used to realize the data transmission between Matlab and OpenSEES by the text or Socket communication variables. The proposed system can be programmed on an external computer connected with the hardware I/O channel of the MTS electro-hydraulic servo control system through the data acquisition card. In this way, the system can not only avoid the complex underlying programming technology of the electro-hydraulic servo control system, but also reduce the requirement of system itself and finally reduce the test difficulty and cost. The test results of three large-scale structure test models verify the feasibility of the proposed substructure testing system.