浅水调谐液体阻尼器(tuned liquid damper, TLD)在水平简谐激励作用下，内部流体自由液面运动幅值响应曲线在跳跃频率点会出现幅值骤降现象。本文基于三阶非线性幅值时域方程，通过量纲分析忽略高阶项，获得考虑粘性阻尼影响下的跳跃频率近似计算公式。为了验证公式的有效性，通过六自由度运动模拟器以及浅水TLD水箱进行系列实验，将所提公式计算结果与现有公式计算结果、实验测量结果进行对比分析，发现新公式计算结果整体上与实验测量结果更加吻合，优于现有计算公式。新公式综合考虑水深、特征长度、激励幅值以及粘性影响，在阻尼影响较大的领域会具有更好的适用性。
Abstract
Under the action of horizontal harmonic excitation, the amplitude response curve of the internal fluid free surface motion of the shallow-water tuned liquid damper (TLD) will show a sudden drop at the jump frequency point. In this paper, based on the third-order nonlinear amplitude time domain equation, the approximate calculation formula of jump frequency considering the influence of viscous damping is obtained by ignoring the high-order term through dimensional analysis. In order to verify the validity of the formula, a series of experiments were carried out through a six-degree-of-freedom motion simulator and a shallow-water TLD tank. The calculation results of the proposed formula were compared with the calculation results of the existing formula and the experimental measurement results. It is found that the new formula is more consistent with the experimental measurement results as a whole, which is better than the existing calculation formula. At the same time, the new formula comprehensively considers the influence of water depth, characteristic length, excitation amplitude and viscosity, and has better applicability in the field with greater damping influence.
关键词
浅水调谐液体阻尼器(TLD) /
跳跃频率 /
近似计算公式
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Key words
shallow-water tuned liquid damper (TLD) /
jump frequency /
approximate calculation formula
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参考文献
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