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Lightning partition division method

A lightning and zoning technology, applied in the aviation field, can solve the problems of high cost and long time, and achieve the effect of less capital consumption, faster speed and less manpower

Pending Publication Date: 2021-03-09
SHAANXI AIRCRAFT CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the time-consuming and expensive shortcomings of the existing aircraft lightning strike area division test, and provides a simulation calculation method for obtaining aircraft lightning strike area division through software simulation

Method used

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Embodiment Construction

[0028] Ansys Q3D software can use the quasi-static method to give the distribution of induced charges on the surface of the aircraft at a short time before the lightning strikes the aircraft. Since the lightning voltage varies from millions of volts to hundreds of millions of volts, the voltage between the clouds changes in the simulation, and the charge distribution on the surface of the aircraft will also change. However, the charge distribution trend is the same under different circumstances. The definition of the initial lightning attachment area, combined with the distribution of induced charges, determines the initial lightning attachment area, and then divides each lightning area into area 1.

[0029] The main implementation steps of using Ansys Q3D software to divide the lightning strike area include: aircraft model repair (the original structural model of the aircraft does not meet the electrical continuity requirements of the simulation software), simulation model est...

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Abstract

The invention provides a novel method for dividing a lightning partition into a first area (including a 1A area and a 1B area), which comprises the following steps of: constructing an airplane and a discharge cloud layer model, and taking a pitch angle, a yaw angle and a roll angle which are zero degree as a reference simulation model, whrein in combination with an SAE-ARP-5414A standard partitioning theory, repeated simulation analysis shows that the area 1 based on charge distribution is partitioned by taking about 35% of the maximum charge density induced on the surface of an airplane as athreshold value, and the area exceeding the threshold value is determined as the area 1 of a lightning partition; under different pitch angles, yaw angles and roll angles, acquiring aircraft surface charge distribution conditions under different angles; and according to the aircraft surface charge distribution conditions at different angles, performing statistics to obtain lightning division conditions of the first area of each area of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of aviation, and relates to a method for dividing lightning partitions. Background technique [0002] Lightning protection is an important part of modern aircraft design, and the lightning strike area division of aircraft is the basis for aircraft lightning protection design. After the lightning strike area is divided, according to the distribution of different lightning strike areas, lightning protection design can be carried out for different lightning strike areas and equipment in the area. [0003] At present, the lightning strike area division of aircraft is mainly determined by the lightning area division test of the aircraft scale model or scaled model. To carry out aircraft lightning area division tests, it is necessary to make aircraft scale or scale metal models, formulate test plans, and finally require professional test sites and equipment. The entire test process is complicated, time-consuming,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/15G06F30/20
Inventor 徐宏兵张国华高小红邓爱国冯卉萱周甄李亚玲张强
Owner SHAANXI AIRCRAFT CORPORATION
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