Boat body surface meshing method and device for hydrodynamic calculation

Abstract

The invention relates to the technical field of a boat analog simulation technology, and provides a boat body surface meshing method and device for hydrodynamic calculation. The method comprises the following steps of 1, reading a boat body STL model to obtain the boat body scale information; 2, performing slicing processing on the boat body STL model by using the obtained boat body scale information to obtain all slice data of the boat body STL model; and 3, using all slice data of the boat body STL model to divide boat body surface lattices. The boat body surface lattices in the boat body hydrodynamic calculation can be fast generated; the generation process is simplified; the dense and precise boat body sectional line data can be accurately obtained; the errors due to three-dimensionalinterpolation and curve-fitting can be avoided; the real-time performance of the algorithm is good; and various complicated boat types difficult to be processed by the existing algorithm can be processed.

Description

technical field [0001] The invention relates to the technical field of ship simulation, in particular to a hull surface grid division method and device for hydrodynamic calculation. Background technique [0002] The rapid development of computer technology provides good development opportunities for ocean engineering and computer fluid dynamics. One of the important problems is how to automatically generate grids around complex shapes. The hull surface meshing methods are emerging, and the existing technologies typically include the following two methods: [0003] 1. First, according to the known value data, the half-section profile line of each station is constructed into a cubic parametric spline curve with accumulated chord length, and then the equal chord length division method is adopted. The corresponding parameter coordinates of the interpolation nodes are calculated according to the input vertical grid number of the half-section of each station, and then the coordin...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves technical problems such as the complexity of grid division methods in the prior art and difficulty in ensuring grid division accuracy, and proposes a hull surface grid division method and device for hydrodynamic calculations, which can quickly generate hull hydrodynamic forces. The hull surface grid in the calculation simplifies the generation process, can accurately obtain dense and precise hull shape data, and avoids errors caused by 3D interpolation and curve fitting. The algorithm has good real-time performance and can handle the difficult problems of existing algorithms For various complex ship types, only the hull STL model is needed to generate a quadrilateral grid on the hull surface, which can be applied to hull hydrodynamic calculations, such as hull additional mass, calculation of ship resistance, etc.

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