The TLCD U-Tube Liquid Sloshing Finite Element Modal Analysis

Sun, Jie; Li, Gong Yu; Liu, Qing Bo

doi:10.4028/www.scientific.net/amr.694-697.350

AMR

2013

DOI: 10.4028/www.scientific.net/amr.694-697.350

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The TLCD U-Tube Liquid Sloshing Finite Element Modal Analysis

Jie Sun

Gong Yu Li

Qing Bo Liu

Abstract: The paper studies the dynamic characteristics of liquid sloshing in TLD rectangular container, and verifies the feasibility of finite element numerical simulation, by the theory and finite element numerical simulation of liquid sloshing. Similarly employing the verified numerical simulation method, we get the sloshing frequency and mode of liquid sloshing in TLCD u-tube container.

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2020

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“…CFD models are created in ANSYS FLUENT 17.2 software and simulated using a standard k-ε solver, widely used to simulate turbulent flow[31,32,33]. The maximum mesh size is set as 0.01 m, with much finer mesh around the orifices in the bottom area.…”

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confidence: 99%

Development and validation of a nonlinear dynamic model for tuned liquid multiple columns dampers

Cao

Gong

Ubertini

et al. 2020

Journal of Sound and Vibration

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The tuned liquid column damper (TLCD), a passive damping device consisting of a large U-tube with oscillating liquid, has been shown to be effective at mitigating structural responses under natural hazards. Aside from their bandwidth-limited mitigation capabilities, a key limitation of TLCDs is in their large geometries that occupy large space often at prime locations. A solution is to implement multicolumned versions, termed tuned liquid multiple columns dampers (TLMCDs), which have the potential to be tuned to multiple frequencies and occupy less space by leveraging the multiple columns to allow fluid movement. However, mathematical models characterizing their dynamic behavior must be developed enabling proper tuning and sizing in the design process. In this paper, a new analytical model characterizing a TLMCD as a multiple degrees-of-freedom coupled nonlinear system is presented. The frequencies of free vibration and vibration modes of a TLMCD are identified in closed-form formulations. Results are validated using computational fluid dynamics simulations, and show that the analytical model can predict the damper's liquid surface movements as well as its capability to reduce structural vibration when the structure is subjected to harmonic excitations. A parametric study is conducted to investigate the effect of head loss coefficients, column spacing, cross-section area ratios, and column numbers on mitigating structural response. It is found that, while TLMCDs are less effective than traditional TLCDs under an equal liquid mass, they can provide enhanced performance under geometric restrictions.

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mentioning

confidence: 99%

Development and validation of a nonlinear dynamic model for tuned liquid multiple columns dampers

Cao

Gong

Ubertini

et al. 2020

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

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The TLCD U-Tube Liquid Sloshing Finite Element Modal Analysis

Cited by 1 publication

References 1 publication

Development and validation of a nonlinear dynamic model for tuned liquid multiple columns dampers

Development and validation of a nonlinear dynamic model for tuned liquid multiple columns dampers

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