Stability and Capsize оf Free-Standing Hydrotank: Development of Trial Tanks to Test Underwater Robots

The problem of capsizing object, which are free-supported under the forces of gravity, elasticity, friction, and other unpredictably changing external influences, is a global challenge for the civil engineering and for transport (air, road, rail, and others). Much of the research activities on capsizing the free-supported objects of the certain types are fragmentarily included in the different subject areas of technical applications. In particular, it is typical for a hydrotank that is a thin-walled shell-type liquid-filled container. The hydrotank problems are multiple structural, geometric and natural forms of nonlinearity. The aim of this study is to determine the phase and the critical parameters of the basic objects of simple shape with different supporting plane: cube; box; cylinder etc., pouring the fluid, with or without shell. Hydrotank capsize as a solid body with a fluid is analysed and as a first approximation this analysis precedes the assessment of stability of the object as a hydroelastic system. The experimental results prove the possibility to design, manufacture and use this type of hydrotanks to test underwater robots. The work gives more undestanding on the studied problem and on the sphere wherein results can be efficiently implemented.

hydro tray, hydrocolumns, hydrostatics, hydraulic tank, hydro pipe, hydroelasticity, underwater test, underwater robot, sustainability

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