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Numerical simulation method and system for falling of object in ocean current

A numerical simulation and ocean current technology, applied in the field of numerical modeling and simulation, can solve problems such as falling interference, failure to reach the destination safely, cable breakage, etc., to achieve flexible model establishment and setting, wide practicability, and great flexibility Effect

Active Publication Date: 2020-07-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increasingly complex operating environment, when deep-sea cranes are operating at sea, many interference problems have occurred in the process of the load falling after entering the water
The load may not reach the destination safely due to sea waves, ocean currents and the ship's own navigation
This may cause collision between the deck and the load, resulting in damage, or the cable may break due to excessive tension, causing more serious safety problems

Method used

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  • Numerical simulation method and system for falling of object in ocean current
  • Numerical simulation method and system for falling of object in ocean current
  • Numerical simulation method and system for falling of object in ocean current

Examples

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Embodiment 1

[0043] The invention provides a numerical simulation method for an object falling in an ocean current, comprising: establishing a pool model and an object model according to initial pool parameters and initial object parameters;

[0044] According to the preset grid parameters, the pool model is meshed; according to the preset ocean current parameters, the boundary conditions and fluid motion parameters of the pool model are set to form a simulated ocean current model;

[0045] According to the preset physical parameters, the free fall model of the object model is established in the liquid; the free fall model establishment step includes setting the moving grid of the object model falling: generating the background grid of the hexahedral region; the sub grid of the object model falling Embedded into the background grid via the overset grid;

[0046] Import the free fall model of the object model in the liquid into the simulated ocean current model, start the simulation step, a...

Embodiment 2

[0059] This embodiment discloses a method for establishing a numerical simulation model of an object falling in an ocean current, specifically:

[0060] figure 1 It is a flow chart of a numerical simulation method for objects falling in ocean currents in this embodiment.

[0061] Such as figure 1 As shown, the numerical simulation method of the object falling in the ocean current in this embodiment includes:

[0062] According to the initial pool parameters and object parameters, the pool model and object model are established to form a simulated pool environment, and the pool model is meshed according to the preset grid parameters;

[0063] According to the preset ocean current parameters, set the boundary conditions of the pool model and the parameters of fluid flow to form a simulated ocean current model;

[0064] According to the preset object parameters, set the gravity parameters to form a gravity environment and establish a model of objects falling freely in the liqu...

Embodiment 3

[0115] Figure 8 It is a structural schematic diagram of a numerical simulation system for objects falling in ocean currents in this embodiment.

[0116] Such as Figure 8 As shown, this embodiment provides a numerical simulation system for objects falling in ocean currents, including:

[0117] (1) Model building module, which is used to establish a pool model and an object model according to the initial pool parameters and object parameters to form a simulated pool environment, and divide the pool model into grids according to preset grid parameters; The initial conditions and boundary conditions of the pool are set to realize the fluid flow of the numerical pool.

[0118] The grid parameter is the spacing of the grid in the XYZ three-dimensional coordinate system, and the spacing values ​​are all equal, and the spacing values ​​are adjustable values.

[0119] (2) The simulation ocean current environment formation module is used to set the boundary conditions of the model ...

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Abstract

The invention provides a numerical simulation method and system for falling of an object in ocean current, and the method comprises the steps: building a pool model and an object model according to aninitial pool parameter and an initial object parameter; performing mesh generation on the pool model according to preset mesh parameters; according to preset ocean current parameters, setting boundary conditions and fluid motion parameters of the pool model, and forming a simulation ocean current model; establishing a free falling model of the object model in the liquid according to preset physical parameters, wherein the step of establishing the free falling model comprises the following sub-steps: setting a moving grid of falling of an object model; generating a background grid of a hexahedron region; embedding the falling sub-grids of the object model into a background grid through an overset grid; importing the free falling model of the object model in the liquid into a simulation ocean current model, and starting a simulation step. According to the invention, the falling process of different objects under different ocean current conditions can be simulated conveniently, and the cost is lower.

Description

technical field [0001] The invention belongs to the field of numerical modeling and simulation, and in particular relates to the establishment and method analysis of a numerical simulation model for objects falling in ocean currents. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the gradual increase in the exploration of deep-sea resources, the operation of deep-sea cranes to lower objects in the ocean is being used more and more widely. Due to the increasingly complex operating environment, when deep-sea cranes are operating at sea, many interference problems have arisen in the process of the load falling after entering the water. The load may not reach the destination safely due to sea waves, ocean currents and the ship's own navigation. This has the potential to cause a collision between the deck and the load, resulting in dama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/38G06F111/10
Inventor 马昕陈文姝宋锐荣学文田国会李贻斌
Owner SHANDONG UNIV
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