Digital ship model planar motion mechanism experimental method based on CFD software

A technology of plane motion mechanism and experimental method, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of increased cost, great influence of physical conditions and human factors, and long time period.

Inactive Publication Date: 2008-08-20
HARBIN ENG UNIV
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Problems solved by technology

At the same time, there are also some shortcomings: in the design process, the rationality of selecting the boat type is checked through experiments. If the model needs to be changed many times, the manufactured model will no longer be applicable. If it is changed again, the time period fo

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  • Digital ship model planar motion mechanism experimental method based on CFD software
  • Digital ship model planar motion mechanism experimental method based on CFD software
  • Digital ship model planar motion mechanism experimental method based on CFD software

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[0064] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0065] Figure 1 is the program flow chart of the simulated work calculation, from which we can clearly understand the steps of the simulated planar motion mechanism experiment; Figure 2 is the GAMBIT diagram of the model, which is established by the GAMBIT pre-processing software. Each part of a model is also established based on this model; Fig. 3 is a model control domain selection diagram, which is the control domain established for the model in Fig. 2; Fig. 4 is a model quality inspection diagram, which divides the body Mesh quality inspection by grid, the worst grid in this grid division is EquiSize Skew is 0.750, Figure 4 is a screenshot when EquiSize Skew is in the range of 0.7-0.8; Figure 5 is the model grid quality inspection plane diagram , for the plane view when checking the volume grid, it is also the display of the grid density distribution, Figure 5...

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Abstract

The invention provides a digital ship model plane motion organization experimental method based on computation fluid dynamics CFD software FLUENT. The method includes applying a FLUENT pre-process software GAMBIT to establish a research object model and a control domain; arranging a triangle grid on the model surface, then arranging a unstructured grid in the control domain; setting the boundary condition, joining an user-defined function UDF document, introducing dynamic grid technology, using a finite volume method based on the complete unstructured grid, realizing a pure swaying movement, a pure rising and falling movement, a pure oscillatory movement, a pure pitching movement and a pure rolling movement carried on by a plane motion organization experiment; applying a science computation software MATLAB to do Fourier expansion of a force and a moment coefficient obtained by the FLUENT, being fitted by EXCEL least squares method, obtaining a hydrodynamic force coefficient of a vertical plane and a horizontal plane as well as the related hydrodynamics analysis by dimensionless. The invention carries on the digit plane motion organization experiment using the CFD software, can satisfy the request of hydrodynamic force data in the design initial period of a submersible.

Description

(1) Technical field [0001] The invention relates to an experimental method for the hydrodynamic performance of an underwater robot. (2) Background technology [0002] At present, after the preliminary design of the underwater robot is completed, the hydrodynamic performance research must be carried out. It is a traditional and practical method to carry out the planar motion mechanism experiment in the circulating water tank. At the same time, there are also some shortcomings: in the design process, the rationality of selecting the boat type is checked through experiments. If the model needs to be changed many times, the manufactured model will no longer be applicable. If it is changed again, the time period for modification or construction will change. It is long and the cost increases; the manufactured model has no other functions after the experiment is completed, which is not conducive to environmental protection; the experiment is greatly affected by physical conditions ...

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 张赫李晔庞永杰徐玉如秦再白苏玉民万磊邹劲
Owner HARBIN ENG UNIV
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