Abstract
The implementation of floating structures has increased with the construction of new sluices for flood control, and the hydrodynamic moment of a floating structure affects the safety and operation of that structure. Based on basic hydrodynamic theory, theoretical analysis and 121 physical model tests were conducted to study the relationships between the hydrodynamic moment and the influencing factors of floating structures, namely, the shape parameter, hydraulic conditions, and draft depth. Stepwise regression fitting based on the least squares method was performed to obtain a mathematical expression of the hydrodynamic moment, and the experimental results show that hydrodynamic factors significantly influence the hydrodynamic moment of such structures. The results predicted by the mathematical expression agree with the experimental results, and thus, the proposed expression can be used to comprehensively analyze and study the safety of a floating structure under the action of flow in finite water.
Highlights
There is an increasing trend in the applications of floating structures in inland water conservancy projects, such as inland navigation and flood control, as well as in marine engineering [1,2]
To investigate floating structures in infinite water, Lee and Hong [5] studied the wave force acting on a floating structure using physical experiments and verified a test of nonlinear waves acting on a structure via the marker and cell numerical method
Roy and Ghosh [7] measured the horizontal force and momentum of plates at different depths under wave action through model tests and found that the force and momentum converged with increasing wave periods and varied with the positions of the plates
Summary
There is an increasing trend in the applications of floating structures in inland water conservancy projects, such as inland navigation and flood control, as well as in marine engineering [1,2]. Venugopal et al [6] studied floating structures at different positions under wave action through physical model tests and found that different structure types (different depth-to-width ratios) influence the wave forces in the horizontal and vertical directions. Cui et al [17,18] analyzed the influencing factors of the hydraulic characteristics around floating structures in finite flowing water and described the velocity distribution and the hydraulic characteristics, which were affected by the shape, position and hydraulic conditions of the structure. According to the principles of a system in equilibrium, Fu et al [19] analyzed the hydraulic characteristics of a new type of floating sluice in a current based on hydraulic model tests and found that the stability of the structure was affected by its center-of-gravity position, free surface, ballast form and operating speed and by the flow and constraint conditions. The statistical theory is applied to diagnose and verify the correctness of the formula to provide a basis for the safe operational control of a floating structure under the action of flow, which has important theoretical significance and practical application value
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