Reduction in turbulence-induced non-linear dynamic vibration using tuned liquid damper (TLD)

Ananya Majumdar; Biplab Ranjan Adhikary; Partha Bhattacharya

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arXiv · 2210.00428

Reduction in turbulence-induced non-linear dynamic vibration using tuned liquid damper (TLD)

Ananya Majumdar·Biplab Ranjan Adhikary·Partha Bhattacharya

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Abstract

In the present research work, an attempt is made to develop a coupled non-linear turbulence-structure-damper model in a finite volume-finite difference (FV-FD) framework. Tuned liquid damper (TLD) is used as the additional damping system along with inherent structural damping. Real-time simulation of flow-excited bridge box girder or chimney section and the vibration reduction using TLD can be performed using the developed model. The turbulent flow field around a structure is modeled using an OpenFOAM transient PISO solver, and the time-varying drag force is calculated. This force perturbs the structure, causing the sloshing phenomena of the attached TLD, modeled using shallow depth approximation, damping the flow-induced vibration of the structure. The structural motion with and without the attached TLD is modeled involving the FD-based Newmark-Beta method using in-house MATLAB codes. The TLD is tuned with the vortex-shedding frequency of the low-Reynolds number flows, and it is found to be reducing the structural excitation significantly. On the other hand, the high-Reynolds number turbulent flow exhibits a broadband excitation, for which by tuning the TLD with few frequencies obtained through investigations, a good reduction in vibration is observed.

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Ananya Majumdar, Biplab Ranjan Adhikary, Partha Bhattacharya. 2022-10-02. Reduction in turbulence-induced non-linear dynamic vibration using tuned liquid damper (TLD). https://arxiv.org/abs/2210.00428

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