Method for determining aircraft lightning stroke attachment point position

Abstract

The invention relates to a method for determining an aircraft lightning stroke attachment point position, which is based on an aircraft scale model lightning stroke attachment point test method, a simulation model of an aircraft lightning stroke attachment point is built, the aircraft model is built according to a practical aircraft or an aircraft design drawing, and is put between a simulation high voltage terminal and an infinite ground plane, the pitch angle and the azimuthal angle of the aircraft model are adjusted for adjusting the relative states of the aircraft model and a high voltage motor, so the lightning leaders which correspond to different aircraft model directions can be simulated; based on an electrostatic filed theory, a finite element method is adopted for the electrostatic field solution, so the electric filed distribution of the surface and the peripheral area of the aircraft model is obtained; and according to the electric field intensity of the surface of the aircraft model, the aircraft lightning stroke attachment point position is determined. The method can be used for effectively solving the problem of lightning attachment point partition, and can avoid the intrinsic limits and defects of similar analogy methods and test methods.

Description

technical field [0001] The invention relates to the technical field of aircraft lightning strike effect simulation, in particular to a simulation method for determining the position of an aircraft lightning strike attachment point. Background technique [0002] Aircraft operating in the atmosphere will inevitably encounter a lightning environment, and there is a high probability of triggering a lightning strike. When an aircraft is struck by lightning, the performance of the on-board electronic and electrical equipment may be disturbed or degraded, and the aircraft may be destroyed or killed. Lightning is a dangerous phenomenon that seriously threatens the flight safety of aircraft. Therefore, lightning protection design must be carried out during aircraft design. Therefore, it is urgent to analyze and study the lightning strike characteristics of aircraft, determine the lightning strike zones of aircraft, and provide a basis for the design and evaluation of aircraft lightn...

AI Technical Summary

Problems solved by technology

Among them, the similar analogy method is relatively simple and easy to implement; the disadvantage is that it is necessary to have the experience of aircraft lightning partitions with similar structures and similar materials

Regardless of whether a scaled model or a full-scale prototype is used, the laboratory test method can truly simulate the lightning strike process and characteristics, and intuitively obtain the location of the lightning attachment point; the disadvantage is that this method is time-consuming and expensive. The equipment has the risk of high voltage electric shock

The method of real aircraft flying over the lightning strike area is an early method, which can directly obtain the material of the lightning strike phenomenon; at present, this method is rarely used. Compared with the laboratory test method, this method is more time-consuming and expensive, and has a greater risk factor

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