Influence of liquid sloshing in the vertical limbs of tuned liquid column dampers on structural response reduction

IF 2.9 3区工程技术 Q2 MECHANICS Acta Mechanica Pub Date : 2025-01-09 DOI:10.1007/s00707-024-04210-8

Anupam Das, Tanmoy Konar, Amiya Pandit, Damodar Maity

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Abstract

This study investigates the impact of liquid sloshing on the efficiency of structural response control in a tuned liquid column damper (TLCD). While most research assumes that the free surface of the liquid remains flat and horizontal during oscillatory motion, real-world conditions cause the surface to become curved, exhibiting sloshing behavior. To account for this, a finite element model of the entire liquid domain within the TLCD is used. From the finite element model, sloshing-induced hydrodynamic forces acting on the TLCD walls are estimated. A numerical analysis is conducted on a single-degree-of-freedom structure with attached TLCD. The structure-TLCD system is subjected to both far- and near-field earthquake ground motions. The oscillatory frequency of the liquid in the TLCD is tuned to the natural frequency of the structure. Optimal TLCD design parameters are determined using the ‘fminsearch’ routine of MATLAB. The structural response reduction by the damper is obtained with and without considering the effect of liquid sloshing in the vertical limbs of the TLCD. The results reveal that non-consideration of the sloshing effect results in an overestimation of the control efficiency of the TLCD.

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调谐液柱阻尼器垂支部液体晃动对结构响应减小的影响

研究了液体晃动对调谐液柱阻尼器结构响应控制效率的影响。虽然大多数研究假设液体的自由表面在振荡运动期间保持平坦和水平，但现实条件会使表面变得弯曲，表现出晃动行为。为了解释这一点，使用了TLCD内整个液体域的有限元模型。从有限元模型出发，估计了作用在TLCD壁面上的晃动引起的水动力。对带有附加TLCD的单自由度结构进行了数值分析。结构- tlcd系统同时受到远场和近场地震地面运动的影响。在TLCD中，液体的振荡频率被调谐到结构的固有频率。利用MATLAB的“fminsearch”例程确定TLCD的最佳设计参数。在考虑和不考虑液体晃动影响的情况下，得到了阻尼器对结构响应的减小。结果表明，不考虑晃动效应会导致高估TLCD的控制效率。

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来源期刊

Acta Mechanica 物理-力学

CiteScore

4.30

自引率

14.80%

发文量

292

审稿时长

6.9 months

期刊介绍： Since 1965, the international journal Acta Mechanica has been among the leading journals in the field of theoretical and applied mechanics. In addition to the classical fields such as elasticity, plasticity, vibrations, rigid body dynamics, hydrodynamics, and gasdynamics, it also gives special attention to recently developed areas such as non-Newtonian fluid dynamics, micro/nano mechanics, smart materials and structures, and issues at the interface of mechanics and materials. The journal further publishes papers in such related fields as rheology, thermodynamics, and electromagnetic interactions with fluids and solids. In addition, articles in applied mathematics dealing with significant mechanics problems are also welcome.