The Research And Implement Of Finite Element Mesh Generation Based On Aircraft Wing Structure

This thesis contains the research and comparison of surface meshing technique and analyzes the principle and strengths and drawbacks of the commonly used algorithms such as Mapping, Topology Decomposition, Grid-based, Mesh Generation Scheme for Arbitrary Planar Domains and Geometry Decomposition, etc. It studies the quadrilateral mesh generation algorithm with feature constraint based on the above-mentioned research, which emphasizes on:First, on the basis of vastly reading and referring relevant papers, the first chapter of this thesis introduces, analyzes and reviews the currently popular mesh generation methods, and previews the research directions in the future.Sencond, the actuality of CATIA secondary development in China and other countries is analyzed and summed up in this paper. Some development methods of CATIA is compared and summed up in it. With the aid of Visual C++ platforms and C++ language, many helpful researches on the CATIA secondary development based on CAA were presented. It realized extract paramter information for aircraft wing structural model and generate medial axis middle surface.Third, This paper proposes extract algorithm of wing structure middle surface and middle axis, according to specific wing structure, designed the whole simple circuit of modle, and designed simple specific method through detailed analysis structure constitution and feature of beam,longitudinal wall,wing rib and aircraft skin. Finally, further handle simple modle of each component,and produce simple modle of wing geometrical modle.Forth, automation generate entire quadrilateral finite element mesh based on paving algorithm.it detailed elaborate the process and key technology of paving, make sure the algorithmic reliability and the running efficiency, generate the quadrilateral mesh and optimization finally.with the actual premise of consistent with the model,practical example shows that the method can simplify the geometric model of wing surface rapidly and generate finite element mesh quickly.