Analysis of Damping From Vertical Sloshing in a SDOF System

Research output: Contribution to journalArticle (Academic Journal)peer-review

5 Citations (Scopus)

Abstract

The effect of the sloshing motion of liquid in a tank on the vertical transient motion of a single degree of freedom system is investigated. Step release tests of a vertically vibrating structure, including a tank containing liquid, demonstrate that added damping from the sloshing motion depends upon the amount of fluid in the tank and the maximum acceleration. The maximum amount of damping was observed at a 50% fill level and the system showed three distinct response regimes during the transient decay, all related to different motions of the fluid. The first response regime, immediately at the start of the transient, is considered to be the most important to exploit for aircraft gust loads alleviation due to its dominant role in the overall energy dissipation balance. Further, to advance the understanding of the modelling and predictive capabilities, coupled fluid-structure models of two opposing levels of fidelity were developed and evaluated. Namely, smoothed particle hydrodynamics (SPH) and an equivalent mechanical model (EMM) based on a bouncing ball model were considered to represent the fluid motion in the tank during the experiment. Both models are shown to provide good predictive capability in the initial impacting sloshing mode while the subsequent flow regime can be predicted with the SPH model only. The findings in this paper open routes towards improved coupled fluid-structure models and their use in improved aeroelastic wing design.
Original languageEnglish
Article number107452
Number of pages24
JournalMechanical Systems and Signal Processing
Volume152
Early online date1 Dec 2020
DOIs
Publication statusPublished - 1 May 2021

Bibliographical note

Funding Information:
The research leading to these results was undertaken as part of the SLOWD project which has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 815044. The SPH numerical work was carried out using the computational facilities of the Advanced Computing Research Centre, University of Bristol ? http://www.bris.ac.uk/acrc/ and the assistance of Mr. Adrian Kraft is gratefully acknowledged.

Funding Information:
The research leading to these results was undertaken as part of the SLOWD project which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 815044. The SPH numerical work was carried out using the computational facilities of the Advanced Computing Research Centre, University of Bristol – http://www.bris.ac.uk/acrc/ and the assistance of Mr. Adrian Kraft is gratefully acknowledged.

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Damping
  • Sloshing
  • Loads Alleviation
  • Experimental Rig Design

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  • HPC (High Performance Computing) Facility

    Susan L Pywell (Manager), Simon A Burbidge (Other), Polly E Eccleston (Other) & Simon H Atack (Other)

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