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Near-field dynamics modeling method for composite materials in thermal conduction problem

A technology of dynamic modeling and composite materials, which is applied in the field of heat transfer system design and manufacture, can solve the problems of heavy workload and low calculation precision, and achieve the effects of high precision, algorithm optimization and good grid adaptability

Active Publication Date: 2018-07-24
SOUTHEAST UNIV
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Problems solved by technology

[0004] Purpose of the invention: Aiming at the problems of low calculation accuracy and heavy workload existing in the existing finite element modeling method, the present invention provides a peridynamic modeling method of composite materials in the heat conduction problem, which is highly reliable high precision and can greatly reduce the workload

Method used

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  • Near-field dynamics modeling method for composite materials in thermal conduction problem
  • Near-field dynamics modeling method for composite materials in thermal conduction problem
  • Near-field dynamics modeling method for composite materials in thermal conduction problem

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Embodiment

[0043] Taking the heat conduction of the front end material of a blunt cone aircraft as an example, the method of the present invention is used to carry out peridynamic modeling. Among them, the front end material of the blunt cone aircraft contains three components: air, heat-resistant coating and internal aluminum alloy material.

[0044] The main steps of the modeling method are as follows:

[0045] 1) Set up a solid model, the outer contour size of the solid model is the same as the front end of the blunt cone aircraft;

[0046] 2) According to the distribution law of each component in the actual material, the solid model is divided, the position of the layered area of ​​each material in the model is determined, and the corresponding material properties are assigned to each area, and the interface of each component of the composite material is obtained at the same time, such as figure 2 ,in figure 2 (a) an overview of the entire solid model; figure 2 (b) is the boundar...

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Abstract

The invention discloses a near-field dynamics modeling method for composite materials in a thermal conduction problem. The method comprises the following steps that (1) an entity model is established;(2) the entity model is divided, layered area positions of all materials in the entity model are determined, and corresponding material attributes are given to all areas; (3) the entity model is divided into unit grids; (4) initial temperature values of all units of the entity model are set; (5) based on a near-field dynamics constitutive relation of mass diffusion, model parameters are integrated, temperature change calculation methods of all the units in the whole entity model are determined, and operation parameters of all the units in the entity model are calculated; (6) calculation is submitted. The modeling method is high in precision and good in grid self-adaptivity, all the parameters in the model are pre-processed, the complexity degree during operation can be greatly lowered, and an algorithm is greatly optimized. Moreover, the modeling method and the operation process are wide in application range and suitable for solution of multiple problems.

Description

technical field [0001] The invention relates to a peridynamic modeling method of a composite material in a heat conduction problem, and belongs to the technical field of heat conduction system design and manufacture. Background technique [0002] With the development of aerospace technology, thermal protection technology has also developed rapidly. In this field, composite materials have better thermodynamic properties than traditional materials and can meet various needs. At the same time, they also have good mechanical properties and plasticity, and are very convenient to prepare. Therefore, they are more and more widely used in various aircraft protective structures. middle. With the increasing number of applications, there are more and more demands for numerical simulation to verify its safety and reliability when designing structures. [0003] The conventional modeling method for composite materials is the finite element method. This method not only has the problems o...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06G06F2119/08
Inventor 郭力周鑫
Owner SOUTHEAST UNIV
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