A Calculation Method for the Load of Hanging Rail Joints in Aircraft Cargo System

Abstract

The invention relates to a method for computing load on connectors of hanging rails of aircraft freight systems. The method includes steps of firstly, simplifying models, to be more specific, simplifying slide rails of cranes into continuous beam structures and simplifying the connectors of the hanging rails and machine structure frames into springs; secondly, determining input parameters including the rigidity k of the simplified springs, the distances L<n> of the connectors of the hanging rails and the rigidity EI of the slide rails of the cranes; thirdly, establishing equations, and converting n spring supports into hinged connection; fourthly, solving unknown quantities in the equations. The unknown quantities M<n> are available after the n spring supports are converted into the hinged connection, and the unknown quantities M<n> represent bending moment at the n springs. The method for computing the load on the connectors of the hanging rails of the aircraft freight systems has the advantages that the hanging rails are simplified into elastically supported multi-pivot continuous beams according to structural mechanics processes when the load on the connectors of thehanging rails is about to be computed, particular rigidity of machine frames at the connectors of the hanging rails is equivalent to elastic support rigidity, the load on the connectors of the hanging rails is further computed, and accordingly the load computation accuracy can be improved.

Description

technical field [0001] The invention belongs to the field of aircraft structural strength calculation, and in particular relates to a method for calculating the load of a suspension rail joint of an aircraft cargo system. Background technique [0002] like figure 1 As shown, a large-scale transport aircraft is generally equipped with an electric crane on the upper part of the fuselage for loading and unloading cargo. The joint 4 and the electric crane 2 which is arranged on the crane slide rail 1 and can slide along the crane slide rail 1, the electric crane 2 is provided with a hook to hang goods. Due to the heavy weight of the hanging goods, and the influence of overload and safety factor, the load distributed on the suspension rail joint 4 is relatively large, and the suspension rail joint 4 is connected to the fuselage structure frame 3, the load of the suspension rail joint 4 is accurate and Whether it is very important, or even affect the safety of the aircraft struc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the load of the suspension rail joint of the aircraft cargo system, which solves the problem that in the current calculation process of the suspension rail joint load of the aircraft cargo system, the calculation accuracy is low due to the rigidity of the fuselage itself, or the method is used The finite element model of the whole machine takes a very long time to calculate the suspension rail joint

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