Influence of the vibroimpact interaction on sloshing dynamics in a rectangular tank

In order to explore the physics implicated with the sloshing phenomenon subjected to independent regular sway, heave and roll excitations of the liquid tank system, theoretical studies are carried out. Four liquid fill levels with static liquid depth, hs, to the length, l of aspect ratio (hs/l) 0.163, 0.325, 0.488 and 0.585, are considered. The energy spectra of sloshing oscillation, their qualitative assessment and the harmonics present in the sloshing oscillation are studied. Frequency Response amplitude has also been presented. The study reveals that sway excites a particular mode of sloshing (primary harmonic) by fulfilling the resonance conditions and also excites secondary modes. However, the roll motion excites the first mode of sloshing irrespective of the excitation frequencies. The heave motion excites the particular mode which is assumed as an initial perturbation.DOI: http://dx.doi.org/10.3329/jname.v10i2.16215

Download Full-text

Nonlinear Vibrations in an Elastic Structure Subjected to Vertical Excitation and Coupled with Liquid Sloshing in a Rectangular Tank. 1st Report. Variations of Resonance Curves due to the Liquid Depth.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.64.77 ◽

1998 ◽

Vol 64 (617) ◽

pp. 77-85

Author(s):

Takashi IKEDA ◽

Masanobu YAMASAKI ◽

Noritoshi NAKAGAWA

Keyword(s):

Nonlinear Vibrations ◽

Liquid Sloshing ◽

Elastic Structure ◽

Vertical Excitation ◽

Rectangular Tank ◽

Liquid Depth ◽

Resonance Curves

Download Full-text

Wave-Based Attitude Control of Spacecraft with Fuel Sloshing Dynamics

Archive of Mechanical Engineering ◽

10.1515/meceng-2016-0015 ◽

2016 ◽

Vol 63 (2) ◽

pp. 263-275 ◽

Cited By ~ 3

Author(s):

Joseph William Thompson ◽

William O’Connor

Keyword(s):

Mathematical Model ◽

Attitude Control ◽

Experimental Validation ◽

Uniform Structure ◽

Structural Flexibility ◽

Control Laws ◽

Single Plane ◽

Pendulum Model ◽

Sloshing Dynamics ◽

Upper Stage

Abstract Wave-Based Control has been previously applied successfully to simple under-actuated flexible mechanical systems. Spacecraft and rockets with structural flexibility and sloshing are examples of such systems but have added difficulties due to non-uniform structure, external disturbing forces and non-ideal actuators and sensors. The aim of this paper is to extend the application of WBC to spacecraft systems, to compare the performance of WBC to other popular controllers and to carry out experimental validation of the designed control laws. A mathematical model is developed for an upper stage accelerating rocket moving in a single plane. Fuel sloshing is represented by an equivalent mechanical pendulum model. A wave-based controller is designed for the upper stage AVUM of the European launcher Vega. In numerical simulations the controller successfully suppresses the sloshing motion. A major advantage of the strategy is that no measurement of the pendulum states (sloshing motion) is required.

Download Full-text