Study On The Influence Of Lifting Platform In Experimental Tank On Test Area And Its Structural Check

The stable reductive ability of flow field is the basic condition to research on the motion law of objects on the lifting platform in the experimental tank.In order to consider the influence of the lifting platform on the flow field itself in the experimental tank,it is primary to design the structure of the lifting platform and determine the geometric configuration of the main components.The influence of on the experimental area was studied according to the physical environment in the actual working condition by using the computational fluid dynamics method STAR-CCM+.The main contents of this paper include the following points:(1)According to the parameter refinement ratio,the grid convergence analysis was carried out to determine the grid size and time step parameter Settings that can meet the requirements of computing accuracy and ensure computing efficiency,laying a foundation for studying the influence of lifting platform on the flow field in the test area.(2)The k-? turbulence model and VOF method were used in STAR-CCM+to track the free surface,and effects of first-order linear wave,fifth-order Stokes wave,uniform flow,shear flow and the combined wave-flow were simulated.The influence of lifting platform on the flow field in the central test area was studied,and reasonable suggestions were put forward for optimizing the flow field shape(3)The mechanical properties of the main load bearing beam,support rod and bottom platform in the lifting platform were checked in ABAQUS and ANSYS,and the vibration characteristics of the lifting platform with attached water mass are calculated and the influence of different boundary conditions on the structural response is discussed.