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CFD-FEM-SPH four-way coupled liquid-carrying ship water elastic response simulation method

A simulation method and hydro-elasticity technology, applied in CAD numerical modeling, geometric CAD, special data processing applications, etc., can solve problems such as comprehensive consideration of tank sloshing problems, and difficulty in considering the coupling effect of tank sloshing.

Pending Publication Date: 2022-01-18
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods are generally difficult to consider the coupling effect of tank sloshing and hull motion in waves, and there are almost no methods that can comprehensively consider ship structural loads, hydroelastic responses, and tank sloshing problems

Method used

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  • CFD-FEM-SPH four-way coupled liquid-carrying ship water elastic response simulation method
  • CFD-FEM-SPH four-way coupled liquid-carrying ship water elastic response simulation method
  • CFD-FEM-SPH four-way coupled liquid-carrying ship water elastic response simulation method

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Embodiment

[0071] In this embodiment, the S175 container ship is taken as an example, the scale ratio of the calculation model is 1:40, the waterline length of the model is 4.375m, and the displacement is 370.5kg. There are 4 cuboid liquid tanks inside the hull, and some water is filled and a certain amount of air gap 9 (loading rate 70%) is reserved. The ship model sails head-on in regular waves, and the flexible deformation effect of the hull structure under the action of waves is considered during the simulation process.

[0072] In this embodiment, the CFD solver uses OpenFOAM software, the FEM solver uses deal.II software, and the SPH solver uses DualSPHysics software. The preCICE software is used as the coupling platform to perform two-way coupling data exchange between CFD and FEM solver and between SPH and FEM solver.

[0073] Such as figure 1 As shown, a CFD-FEM-SPH four-way coupled hydroelastic response simulation method for liquid-carrying ships includes the following steps:...

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Abstract

The invention discloses a CFD-FEM-SPH four-way coupled liquid-carrying ship water elastic response simulation method, which comprises the following steps: S1, establishing a three-dimensional finite element model of a ship body structure in an FEM solver, performing finite element mesh generation on the ship body structure, defining parameters of various structural units, and applying constraints and loads; s2, establishing a numerical pool model in the CFD solver, establishing a pool fluid domain and a hull shell model, and setting various conditions; s3, establishing a liquid tank sloshing model in the SPH solver, and performing attribute setting on the liquid tank; s4, setting a CFD-FEM-SPH four-way fluid-structure interaction data transmission method; and S5, performing program operation solution and data export. According to the method, the combined action of ship motion, wave load, liquid tank sloshing and structural response is comprehensively considered, various fluid-solid coupling problems are fully considered, and the motion and stress conditions of the liquid-carrying ship sailing in waves can be more accurately simulated.

Description

technical field [0001] The invention belongs to the technical field of ship hydroelasticity prediction, and in particular relates to a CFD-FEM-SPH four-way coupled hydroelastic response simulation method for a liquid-carrying ship. Background technique [0002] With the increasing global demand for energy such as oil, natural gas, and hydrogen, the number of various liquid-carrying ships represented by very large oil tankers, liquefied natural gas carriers, and chemical tankers has increased rapidly. With the large-scale, high-speed, light-weight of such ships and the globalization of international trade, the problems of hull motion and structural loads sailing in the harsh ocean conditions have become increasingly prominent. For example, excessive rolling motion of the hull will reduce the stability of the ship and may even cause the hull to capsize. Huge wave loads will threaten the safety of the hull structure, and may cause damage to the local structure or the overall s...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/23G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/15G06F30/23G06F30/28G06F2113/08G06F2111/10G06F2119/14
Inventor 焦甲龙李晓晨
Owner SOUTH CHINA UNIV OF TECH
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