设置TMD系统的高耸结构风振控制实时混合试验自适应时滞补偿研究

RESEARCH ON ADAPTIVE TIME DELAY COMPENSATION FOR REAL-TIME HYBIRD TEST OF WIND-INDUCED VIBRATION CONTROL OF HIGH-RISE STRUCTURES WITH TMD SYSTEM

  • 摘要: 实时混合试验方法将力学性能易于模拟分析的结构作为数值子结构,将力学性能复杂难以描述的物理模型作为试验子结构,通过两者的力和位移等边界协调条件,进行相互间的信息交互。为了解决带调谐质量阻尼器系统的高耸结构风振控制系统,其风致振动响应难以用风洞实验进行测试的难题,该文开发了基于小型电振动台的一套实时混合试验系统。并通过顶部带调谐质量阻尼器装置的广州新电视塔实时混合试验,验证了该文开发的实时混合试验系统用于带调谐质量阻尼器-结构系统风致效应评估的可行性。针对该实时混合系统由于系统非线性等因素造成的时滞效应,该文介绍了一种基于电振动台速度跟踪的自适应时间序列时滞补偿算法,并通过实验和相关算法研究了该实时混合试验系统时滞补偿算法的最优参数。在此基础上,运用该文的自适应时间序列时滞补偿算法,对顶部带调谐质量阻尼器装置的广州新电视塔风振响应进行了实时混合试验。研究表明,该文的自适应时滞补偿算法能够准确地实现幅值响应追踪和减小时滞误差。采用自适应时间序列时滞补偿算法的实时混合试验,与无时滞补偿算法的实时混合试验相比,能获得更加精确的实验结果。

     

    Abstract: The normal Real Time Hybrid Simulation test (RTHS) selects one part of one whole structure with easily understandable mechanical properties as the numerical substructure, and another part of physical model with complex mechanical properties as the experimental substructure. By keeping consistency of the boundary conditions such as force and displacement between two parts, information exchange is conducted during the RTHS test. In order to overcome the difficulty in evaluating the wind-induced vibration response of high-rise structures with tuned mass damper (TMD) systems in the wind tunnel test, a RTHS system with electric motor-driven shaking table was developed in this study. The feasibility of developed RTHS in the evaluation on the wind induced vibration control of TMD-structure system was verified by RTHS test on the Guangzhou New TV Tower with TMD. Since the time delay effect caused by system nonlinearity and other factors in the RTHS system proposed exists, an adaptive time series (ATS) delay compensation algorithm was introduced in order to obtain the good velocity tracking ability for RTHS system. The optimal parameters of the time delay compensation algorithm for the RTHS system proposed were obtained through experiments. On this basis, RTHS test was conducted to evaluate the wind-induced response of the Guangzhou New TV Tower with TMD by the ATS time delay compensation algorithm. Research results showed that the adaptive time delay compensation algorithm proposed could accurately achieve motion-path tracking and reduce errors due to time delay. The RTHS test with ATS time delay compensation algorithm can obtain more accurate experimental results than those from the RTHS test without time delay compensation algorithm embedded.

     

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