Finite element load application method

A finite element and load technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that are difficult to implement accurately, time-consuming, complicated, etc., to ensure loading accuracy, simplify the load application process, and facilitate program implementation Effect

Active Publication Date: 2014-08-13
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

The application of finite element loads is to discretize various loads on the aircraft structure to the finite element nodes. This is a complex, t

Method used

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Embodiment Construction

[0022] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] 1. Taking the load application of an aircraft as the research object, find out the concentrated load among all the loads of the aircraft, including engine load, missile load, and radar load, and divide the distributed load into fuselage, wing, horizontal tail, and vertical tail Four partitions, see attached figure 1 .

[0024] 2. Select the nodes that can be loaded in the finite element model, and press the selected finite element nodes according to the attached figure 1 Partitioned.

[0025] 3. Add the engine load to the joint between the engine and the airframe, add the missile load to the joint between the missile and the airframe, and add the radar load to the fixed point of the radar on the airframe.

[0026] 4. Divide the section of the wing according to the ribs to calculate the section, integrally calculate t...

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Abstract

The invention, which belongs to the field of aircraft designs, relates to a finite element load application method. The finite element load application method is characterized by comprehensively taking the affection of the simplification or distribution of various loads on calculation results and the difficulty level of loading implementation into consideration, the finite element load application method divides aircraft loads into concentrated loads and distributed loads and divides the distributed loads into subareas; nodes to be loaded are chosen from a finite element model and divided into subareas according to the pattern of the distributed load subareas; the concentrated loads and the distributed loads are respectively applied. When the method is adopted to carry out finite element model loading, the precision of engineering calculation can be met, and moreover, computers can be conveniently used for batch processing.

Description

technical field [0001] The invention belongs to the field of aircraft design and relates to a method for applying finite element loads. Background technique [0002] The finite element is an important means of strength analysis of modern aircraft, the accuracy of the load applied in the finite element model is directly related to the correctness of the calculation results. The application of finite element loads is to discretize various loads on the aircraft structure to the finite element nodes. This is a complex, time-consuming, and difficult to implement accurately. At present, there is no unified implementation method and evaluation standard for this work. Contents of the invention [0003] This patent provides a finite element load application method, which comprehensively considers the impact of various load simplifications or discretization on the calculation results, and the difficulty of loading implementation. Using this method for finite element loading can mee...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 何刚王建志吴德锋靳诚忠
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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