TLD减振控制结构振动台子结构试验研究

发布时间：2018-10-29 17:50

【摘要】：现代工程结构日趋复杂化和大型化，为了提高结构抗振性能，新型结构振动控制装置越来越多被引入结构中。调谐液体阻尼器(TLD)是一种典型有效的被动结构控制装置。目前对于TLD减振控制结构的研究主要是通过数值模拟和振动台模型试验。由于TLD依靠水的晃动来提供减振力，精确的数值模型不易建立；另外，振动台模型试验又只能进行小比例尺试验，难以真实反映原型结构性能。本文提出TLD减振控制结构振动台子结构试验方法并展开研究。主要研究内容及结论如下： (1)提出TLD减振控制结构振动台子结构试验方法，搭建振动台子结构试验系统，并对TLD减振控制结构进行数值仿真分析。研究结果表明，，构建的振动台子结构试验方法在原理上是可行的；质量参与系数对中心差分法稳定性有一定影响。 (2)进行TLD减振控制结构振动台全结构试验与振动台子结构试验对比分析。通过对比TLD减振控制结构的振动台全结构与子结构试验结果表明，TLD减振控制结构振动台子结构试验方法是可行的，且具有很好的精度。 (3)基于振动台子结构试验方法研究TLD减振性能。分别研究液面高度、质量比、地震动类别及幅值的影响。研究结果表明：当TLD的频率与被控结构频率接近时减振效果会变好，达到最优频率时减振效果达到最佳；随着TLD质量比的增大，对加速度的控制效果明显变好；对于不同频谱和幅值的地震动，TLD减振效果没有明显规律。
[Abstract]:Modern engineering structures are becoming more and more complex and large-scale. In order to improve the anti-vibration performance of structures, more and more new structural vibration control devices are introduced into the structure. Tuned liquid damper (TLD) is a typical and effective passive structure control device. At present, the research of TLD damping control structure is mainly through numerical simulation and shaking table model test. Because TLD relies on the sloshing of water to provide the damping force, it is difficult to establish a precise numerical model. In addition, the shaking table model test can only be carried out on a small scale, so it is difficult to truly reflect the performance of the prototype structure. In this paper, a substructure test method for vibration table of TLD damping control structure is proposed and studied. The main research contents and conclusions are as follows: (1) the substructure test method of vibration table of TLD damping control structure is put forward, and the test system of vibration table substructure is built, and the numerical simulation analysis of TLD damping control structure is carried out. The results show that the substructure test method is feasible in principle and the mass participation coefficient has a certain influence on the stability of the central difference method. (2) the whole structure test and substructure test of TLD vibration control structure are compared and analyzed. By comparing the experimental results of the whole structure and substructure of the TLD damping control structure, the results show that the substructure test method of the TLD damping control structure is feasible and has good precision. (3) based on the vibration table substructure test method, the vibration absorption performance of TLD is studied. The effects of liquid level height, mass ratio, ground motion type and amplitude were studied. The results show that when the frequency of TLD is close to the frequency of the controlled structure, the damping effect will become better, and when the optimal frequency is reached, the damping effect will reach the best, and with the increase of the mass ratio of TLD, the acceleration control effect will become better. For the ground motion with different frequency spectrum and amplitude, the effect of TLD is not obvious.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.1;TU317

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