Parametric modeling method of pyramid-shaped gradient lattice structure

Abstract

The invention discloses a parametric modeling method of a pyramid-shaped gradient lattice structure. The parametric modeling method comprises the following steps: reading geometric dimension parameters of aircraft wings; establishing a three-dimensional entity model according to the geometric dimension parameters, and cutting the three-dimensional entity model to obtain a unit cell model of a pyramid-shaped gradient lattice structure; parameterizing the unit cell model, optimizing parameters through a control equation, and obtaining a pyramid-shaped gradient lattice structure. Only parametricdesign needs to be carried out, so that manpower and material resources are greatly reduced for design of an aircraft wing model, modeling does not need to be carried out again even if parameters of the structure change, the workload is reduced, parameter representation is unified, seamless integration with existing computer aided design software can be achieved, operation is easy, and errors arenot likely to happen. The invention relates to the technical field of aerospace finite element simulation analysis.

Description

technical field [0001] The invention relates to the technical field of aerospace finite element simulation analysis, in particular to a parametric modeling method of a pyramid-shaped gradient lattice structure with high modeling efficiency and high simulation accuracy, which avoids complicated modeling process in numerical simulation. Background technique [0002] With the rapid development of the aerospace industry, there is an urgent need for lightweight and multi-functional aircraft structures. The load-carrying efficiency of an aircraft can only be improved if the structural weight is reduced. At the same time, due to the complex working environment of the aircraft, its structure should also meet the requirements of multifunctional characteristics. As an advanced porous lightweight structure, the lattice structure is recognized as one of the most promising structures in the aerospace industry. However, the traditional lattice structure is a uniform structure composed o...

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Problems solved by technology

[0003] (1) In the past, the research on the performance of the lattice sandwich structure mainly used the finite element software itself to model, assign material properties, assemble, define contact and other operational analysis models. The modeling process is complicated and difficult to operate. When the parameters of the structure occur When changing, remodeling is required, which greatly increases the workload

[0004] (2) In the traditional pyramid-shaped gradient lattice structure modeling, the lattice design method lacks a unified parameter representation, and a single lattice contains a large number of design variables. A good lattice structure is difficult to seamlessly integrate with existing computer-aided design software, the operation is complicated, error-prone, and the workload is heavy

[0005] At present, in the process of finite element simulation analysis of the structure of the aircraft, the modeling is complicated and cumbersome

Therefore, there is a need for a method to avoid overly complex numerical simulations in the process of aircraft structural modeling

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