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Netting and floating body coupling water elasticity response analysis method

A technique for elastic response, analytical methods

Active Publication Date: 2020-06-12
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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Problems solved by technology

The hydroelastic analysis method of simple floating bodies is relatively mature, but the net structure is quite different from traditional floating bodies due to its special form.

Method used

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  • Netting and floating body coupling water elasticity response analysis method
  • Netting and floating body coupling water elasticity response analysis method
  • Netting and floating body coupling water elasticity response analysis method

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Embodiment Construction

[0027] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0028] A kind of net clothing and floating body coupled hydroelastic response analysis method of the present embodiment, the specific steps of coupled hydroelastic response analysis method are: figure 1 As shown, the finite element model of breeding equipment 12 is established, and the mesh superelement method is adopted when the finite element model is established for net clothing 11; the structure of breeding equipment 12 is as follows Figure 2-Figure 5 As shown, the modal analysis is carried out on the structure of the breeding equipment 12, and the coordinated deformation between the main floating body 7, the slender floating body and the net clothing 11 is considered during the modal analysis, and the corresponding stress and strain under each mode are obtained;

[0029] Calculate the hydrodynamic coefficient and wave excitation forc...

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Abstract

The invention relates to a netting and floating body coupling water elasticity response analysis method. The method includes: establishing finite element model for a netting by adopting a mesh super-element method; carrying out modal analysis on the structure of the breeding equipment, and considering coordinated deformation among the main floating body, the slender floating body and the netting during modal analysis to obtain corresponding stress and strain under each modal; obtaining a wave current load of the netting by a mesh super-unit method; and establishing a motion equation of the breeding equipment, obtaining modal principal coordinates of the breeding equipment structure, and calculating the total stress, strain and motion response of the breeding equipment after modal superposition according to the principal coordinates. According to the method, the stress of each mesh can be no longer calculated through a super-unit method, so that the calculation workload is greatly reduced; by introducing the entity rate, the calculation precision of the netting fluid load is improved; through the coupling analysis of the floating body and the netting, the mutual influence between the netting and the floating body is considered when the motion response is calculated, so that the accuracy of the calculation result is greatly improved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional hydroelastic analysis and calculation methods for ships, in particular to a hydroelastic response analysis method for coupling nets and floating bodies. Background technique [0002] Fish farming has attracted the attention of many countries and enterprises, and the fish farming equipment composed of floating bodies and nets has also been greatly developed. The hydroelastic analysis method of simple floating body is relatively mature, but the net structure is quite different from traditional floating body due to its special form. Net clothing is woven from slender mesh wires, with tens of thousands, even hundreds of thousands, and millions of meshes, and the mesh wires of the net clothing are less rigid. The wave diffraction theory is no longer applicable to the calculation of the hydrodynamic load of nets, and a calculation method suitable for the above-mentioned characteristics of net...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/28G06F30/17G06F119/14G06F113/08
CPCY02A40/81
Inventor 苗玉基丁军叶永林程小明田超陈彧超俞俊
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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