Fusion and Optimization Method of Mesh Model of Ship and Wake

Abstract

The invention belongs to the technical field of ocean remote sensing monitoring and specifically a ship and wake mesh model merging and optimization method. The invention relates to computational fluid mechanic and computational electromagnetic technologies. The method comprises the specific steps of (1), determining an overlapping area of the ship model and the wake model through utilization of prior knowledge for ship and wake models; (2), solving intersection points of triangular surface elements of the ship model and the wake model in the overlapping area; (3), carrying out two-dimensional Delaunay partition on a scattered point cloud, thereby obtaining an initial mesh merging model; and (4), eliminating deformed triangular surface elements, thereby optimizing the mesh model. The merging test of a series of complicated models indicates that the algorithm provided by the invention is applied to the fusion of the mesh models of ship and rough sea surface, and ship and wake with different mesh densities and different structures. The algorithm can be operated stably without an additional condition, the number of the mesh units is reduced, and the deformed triangular surface elements are removed completely.

Description

[0001] field of invention [0002] The invention belongs to the technical field of marine remote sensing monitoring, and in particular relates to a fusion and optimization method of grid models of ships and wakes. Background technique [0003] Triangular surfel meshes are often used in numerical modeling, and are widely used in many fields such as computational fluid dynamics and computational electromagnetics. The triangular mesh modeling of a single model has been engineered, and there are a large number of mature software from mesh generation to optimization. However, in some fields, it is often necessary to splice and fuse any two or more grid models to generate an integrated grid for subsequent numerical calculations. The junction of different models is generally the coupling area of ​​the physical field. Therefore, in order to ensure the accuracy and stability of the calculation, there are often higher requirements on the shape of the cells at the mesh junction. [000...

AI Technical Summary

Problems solved by technology

This type of method needs to specify an accurate boundary, and the positioning accuracy of the boundary has a great influence on the fusion result; however, it is often difficult to determine the precise fusion boundary for the splicing of large-scale complex overlapping areas

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