结构多轴抗震试验加载系统开发及控制策略研究

曾 聪;吴 斌;许国山;陈永盛

振动与冲击 ›› 2014, Vol. 33 ›› Issue (2) : 1-6.

PDF(1982 KB)
PDF(1982 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (2) : 1-6.
论文

结构多轴抗震试验加载系统开发及控制策略研究

  • 曾 聪1,2,吴 斌1,许国山1,陈永盛1
作者信息 +

Research on multi-axial dynamic structural testing system and its control strategies

  • ZENG Cong1,2,WU Bin1,XU Guo-shan1,CHEN Yong-sheng1
Author information +
文章历史 +

摘要

开发基于液压伺服作动器的高性能三自由度结构动力试验加载系统,该系统特点为控制精确、功能全面。建立力控制下位移加载混合控制方法,提出拟静力试验中多作动器耦合控制策略。以足尺钢结构立柱为试件,研究应用三自由度结构动力试验系统进行拟静力试验与混合试验具体方法,验证该试验系统在结构动力试验中应用的可行性、有效性。结果表明,通过对多作动器的耦合控制,该试验系统可在拟静力试验中同时实现对立柱试件恒定的竖向力控制及精确剪切型加载。通过基于α-OS法的混合试验证明该加载系统可精确模拟单柱子结构复杂边界条件,对整体坐标与作动器局部坐标变换,可实现多作动器位移协调加载。该结论可推广至多自由度试验系统研究中。

Abstract

A high-performance 3 Degree of Freedoms Dynamic Structural Testing System (3DOFs testing system) which is mainly built by MTS servo-hydraulic system was developed in this paper. Its prominent advantages are accurate control and comprehensive function. A two-loop feedback control strategy was indicated and extended to multiple actuators’ coupled control. To demonstrate the performance of the proposed testing system and control strategies, a full-scale steel column is considered. It is concluded that, by using the coupled control strategy, the testing system can perform perfectly in the quasi-static test, the vertical force can be kept constant, and shear-mode loading can be achieved simultaneously. Furthermore, by applying α-OS method in the hybrid test, it is proved that the 3DOFs testing system can accurately simulate the complex boundary conditions of column substructure, harmonious loading of multiple actuators can be successfully implemented. The results may promote other studies on multi-axial testing system.



关键词

多自由度加载 / 多作动器控制 / 拟静力试验 / 混合试验 / α-OS法

Key words

multi-axial loading / multi-actuators control / quasi-static test / hybrid test / α-OS method

引用本文

导出引用
曾 聪;吴 斌;许国山;陈永盛. 结构多轴抗震试验加载系统开发及控制策略研究[J]. 振动与冲击, 2014, 33(2): 1-6
ZENG Cong;WU Bin;XU Guo-shan;CHEN Yong-sheng . Research on multi-axial dynamic structural testing system and its control strategies[J]. Journal of Vibration and Shock, 2014, 33(2): 1-6

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