МЕТОД ТРИВИМІРНОГО ПАРАМЕТРИЧНОГО МОДЕЛЮВАННЯ ТИПОВОГО КРОНШТЕЙНА НА ОСНОВІ ПРИМІТИВІВ ЗА ДОПОМОГОЮ КОМП’ЮТЕРНОЇ ІНТЕГРОВАНОЇ СИСТЕМИ SIEMENS NX

Abstract

Design of an analytical etalons of structural elements using computer technologies allows to reduce the costs creation, production and maintenance during its life cycle, to increase work productivity and ergonomics, which will finally increase the quality and competitiveness of manufacturedproducts.To increase the effectiveness of the three-dimensional modeling of aircraft structural elements at the initial stages of design was the general research problem to reach.The aim of the article was to develop the method of three-dimensional parametric modeling of a typical bracket based on primitives using the CAD\CAM\CAE\PLM SIEMENS NX computer integrated system; its’ implementation when creating a typical bracket; forming the method structure.The SIEMENS NX computer integrated system as a three-dimensional modeling system have been selected.Approaches to the analysis and simplification of the typical brackets’ structure have been shown. It was proposed to divide all sizes of the bracket into three groups according to the axes of the coordinatesystem. The development of the method was based on the Form Features typical elements (Block, Cylinder primitives) and Feature Operation typical operations (Edge Blend, Boolean Operations). The developed method includes: structural analysis; brackets’ structure simplification; selec-tion/analysis of a typical operations, Feature typical elements form; synthesis of properties of a typical elements and a simpli-fied brackets’ structure; formation of the initial data using Expression spreadsheet; modeling basedon the results of both analysis and synthesis according to a certain sequence; analysis of the analytical etalons.The method of three-dimensional parametric modeling of a typical structural element, such as a typical bracket, based on primitives have been developed using both the CAD\CAM\CAE\PLM SIEMENS NX computer integrated system and the Expressions spreadsheet and setting parameters during solid bodies creation. Up to 9-11 operations have been obtained for the typical brackets’ structure, which corresponds to a reduction in the number of operations on objects when creating a 3D parametric model with little time consumption. Only four commands have been used without losing the quality of the model, which led to the simplification of the modeling of the analytical etalon of the structural element and the possibility of rapid reconstruction.