Lightning shortest path spatial geometric topology principle-based thunder and lightning partitioning method

A shortest path, geometric topology technology, applied in geometric CAD, electrical digital data processing, special data processing applications, etc., can solve problems such as simulation methods that are not involved, and achieve accurate calculation results and improve calculation efficiency.

Active Publication Date: 2018-05-18
SHANGHAI RADIO EQUIP RES INST
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AI Technical Summary

Problems solved by technology

The invention patent relates to the lightning partition scale model test related to the lightning partition test, the statistics of the entry and exit points and the current measurement device, and does not involve the simulation method based on the principle of spatial geometric topology of the present invention

Method used

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  • Lightning shortest path spatial geometric topology principle-based thunder and lightning partitioning method
  • Lightning shortest path spatial geometric topology principle-based thunder and lightning partitioning method
  • Lightning shortest path spatial geometric topology principle-based thunder and lightning partitioning method

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Embodiment

[0072] Taking the B757 aircraft as an example, the specific implementation process of the above steps is described in detail:

[0073] Described step S1 specifically comprises:

[0074] S11. Establish or import the target three-dimensional CAD geometric model, the CAD geometric model is as figure 2 As shown, specifically, the 3D CAD geometric model of the aircraft target is established or modified in the CAD software, and the 3D CAD geometric model of the target is imported into the simulation software with mesh division function.

[0075] S12. Meshing the target CAD model, specifically:

[0076] In the simulation software with mesh division function, the CAD model of aircraft target is discretized by triangular surface elements. The vertices of the triangular surface elements are nodes, and the nodes of adjacent triangle surface elements are required to be connected to each other. The premise of lightning partition is to set the lightning attachment point. Since any positi...

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Abstract

The invention discloses a lightning shortest path spatial geometric topology principle-based thunder and lightning partitioning method. The method comprises the following steps of: S1, dividing a target CAD model into a grid model; S2, reading a target grid model file and constructing a data matrix of network nodes; S3, establishing a center point coordinate data matrix of a target surface grid node tangent lighting stroke sphere, constructing a lightening stroke sphere and calculating topological features of lightening stroke attachment points; S4, judging and calculating a lightning stroke probability characteristics of a lightning stroke contact point on the surface of an airplane target according to a result of the step S3; and S5, repeating the steps S3 to S4 to carry out calculationand statistic on lightning stroke probabilities of the same lightning stroke contact point under all the lightning stroke sphere radii, so as to obtain a lightning stroke attachment point distributionresult of the airplane target. The method has the advantage of effectively providing reference bases for lightning protection design, verification test and airworthiness compliance test of spacecraft.

Description

technical field [0001] The invention relates to the technical field of aircraft electromagnetic environment effects, in particular to a lightning partition method based on the space geometric topology principle of the shortest path of lightning. Background technique [0002] Lightning is one of the most common natural phenomena. For various types of aircraft, with the extensive use of electronic equipment and new composite materials, lightning will affect their operational safety and may even cause catastrophic accidents. Taking aviation aircraft as an example, when the aircraft is struck by lightning, the nose cone and the top of the vertical tail often become the entrance and exit of lightning. The transient electromagnetic fields that appear outside and inside the machine are coupled through the interconnection harness of the internal equipment, and transient high voltage and high current appear at the interface of electronic and electrical equipment, which may cause diso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 王万富陈奇平
Owner SHANGHAI RADIO EQUIP RES INST
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