Numerical investigation of nonlinear sloshing features and vibration mitigation efficiency of the implanted pole tuned liquid damper

A tuned liquid damper (TLD) is an economically efficient dynamic vibration absorber that effectively mitigates excessive wind-induced vibrations in high-rise buildings, thereby improving occupant comfort. This research proposes an implanted pole TLD. The implanted pole not only induces disturbances for the oscillating liquid across multiple directions, which enhances energy dissipation efficiency, but also exhibits high stiffness, providing support to the large-scale tank and resisting significant liquid sloshing force, ultimately ensuring the safe and stable operation of TLD. To further investigate the impact of the implanted pole on the liquid oscillation response and vibration mitigation efficiency of TLD, this study utilizes the computational fluid dynamics approach to improve the OpenFOAM two-phase flow solver by coupling the level set method and the volume of fluid (VOF) method (CLS-VOF), which enhances the precision of free surface tracking. The effects of liquid depth, pole dimension, and excitation amplitude on the nonlinear oscillation features of the internal liquid are examined. Moreover, a bidirectional coupled numerical model for the structure-TLD system is developed through secondary development within OpenFOAM. This model accurately captures the interplay between liquid oscillation and structural dynamics response. The numerical simulation results show excellent correlation with the experimental data. The effectiveness of the implanted pole TLD in mitigating the wind-induced vibration response of a high-rise building is further analyzed by varying the pole obstruction ratio and the tuning ratio. The bidirectional coupled numerical model, being an accurate and efficient method, can assist engineers in the detailed design and optimization of TLD.