Realization of High Performance Tuned Liquid Damper based on Nonlinearity Control and Damping Control

在本研究项目中，为了建立预测各种类型调谐液体阻尼器（TLD）性能的计算方法，对三种类型的TLD进行了以下研究。(1)深水型圆柱阻尼器首先推导了描述这种阻尼器性能的基本理论，然后研究了在圆柱中间插入单网的情况，最后根据所提出的理论开发了模拟程序，并通过试验结果进行了验证。试验中选取了插入式网片的开孔率、网片与主体结构的质量比、初始振幅、液深比等设计参数。(2)矩形阻尼器从作者提出的矩形TLD的成熟理论出发，研究了两种情况，例如垂直于矩形容器的底壁插入多个网的情况和垂直于矩形容器的每个侧壁插入两个网的情况，以实现矩形TLD的更高性能。针对这两种情况，基于所提出的分析模型开发了仿真程序，并将仿真结果与实验结果进行了比较。(3)变阻尼TLD为了开发一种变阻尼涡轮机，对具有稳定进、出口流的矩形涡轮机进行了基础研究。首先，通过振动台试验研究了矩形容器在定常进出口流场中的晃动共振特性，并采用摄动法进行了相应的非线性分析。随后，研究了有和没有稳定的入口和出口流动的TLD产生的耗散能的差异，这给我们提供了稳定的入口和出口流动的TLD产生更宽的谐振范围的结果。

In this research project, to establish the method of calculation for predicting the performance of various types of Tuned Liquid Dampers (TLDs), the following studies with three types of TLDs were conducted.(1) Deep water type cylindrical damperBasic theory for describing the performance of this type of TLD is first derived and then the case with a single net inserted in the middle of the cylinder is investigated .Finally, the simulation code is developed based on the proposed theory which was verified by the experimental results. In the experiment, open area ratio of the inserted net, mass ratio between TLD and main structure, initial amplitude, liquid depth ratio were selected as design parameters.(2) Rectangular damperStarting from well established theory for rectangular TLD developed by authors, two cases such as the case with multiple nets inserted perpendicular to the bottom wall of a rectangular container and the case with two nets inserted perpendicular to each side wall of a rectangular container were investigated to achieve higher performance of rectangular TLDs. With these two cases, simulation code is developed based on the proposed analytical model, the results of which were compared with experimental results.(3) Variable damping TLDTo develop a variable damping TLD,basic studies were performed with a rectangular TLD with steady inlet and outlet flow. First, to investigate the resonant characteristics of sloshing in a rectangular container with steady inlet and outlet flow, shaking table tests were performed and corresponding nonlinear analysis based on perturbation method is conducted. Succedingly, the difference of the dissipation energy produced by TLDs with and without steady inlet and outlet flow were investigated which gives us the result that TLD with steady inlet and outlet flow yields wider resonant range.