Aerodynamic load loading method used for reliability tests on aircraft flap and slat system

Abstract

The invention relates to an aerodynamic load loading method used for reliability tests on an aircraft flap and slat system. The method includes the concrete steps that first, aerodynamic loads of each slat in various flight states are obtained through wind tunnel tests or simulating calculation; second, according to the aerodynamic loads of each aircraft slat in various flight states, the resultant force of the aerodynamic loads on the face of each slat in various flight states is calculated; third, the resultant force of the aerodynamic loads on the face of each aircraft slat in various flight states is decomposed into a plurality of component forces, and the magnitudes and the directions of the component forces are obtained; fourth, the component forces in the third step are evenly distributed and loaded to the face of each slat through adhesive tape and a lever system. According to the aerodynamic load loading method, the aerodynamic loads of each slat in various states during a flight period are considered; the aerodynamic loads obtained through tests or simulation can be effectively converted in the loading modes achieved in the tests, and real aerodynamic loads are guaranteed.

Description

technical field [0001] The invention relates to the field of reliability tests of aircraft components, in particular to an aerodynamic load follow-up loading method for reliability tests of aircraft flap and slat systems. Background technique [0002] Aircraft flaps and slats play an important role in the flight process of civil aircraft. There are two main functions: one is to delay the separation of airflow on the wings, which increases the critical angle of attack of the aircraft, so that the aircraft can fly at a greater angle of attack. The second is to increase the lift coefficient of the wing. The failure of the aircraft flap and slat movement mechanism will have a great impact on the safety of the aircraft, and even cause severe consequences of aircraft crash and death. [0003] Based on the importance of the flap and slat system to aircraft flight safety, the flap and slat system is required to have high reliability. However, in order to evaluate the reliability i...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the technical level and the complexity of large and complex mechanical products, the current reliability simulation cannot completely replace the reliability test

[0004] In the prior art, if the flap and slat system is to be tested for flight, it is not only costly, but also risky. Once the flap and slat system cannot be retracted normally, it is very likely to cause a serious accident of aircraft crash

Therefore need a kind of test method and device that can carry out reliability test on flap, slat system on the ground; And for the test of this kind of mechanical product, existing test method often does not consider the aerodynamic load of slat to flap, slat during flight. The impact of system performance, the simulated environmental conditions are not realistic enough

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