Airplane mooring load calculating method

Abstract

The invention belongs to the technical field of aviation and in particular relates to load calculation of stationed mooring of airplane bodies and landing gears on a motion platform deck. An airplane mooring load calculating method is characterized by providing a non-linear GAP unit FEM calculation analyzing method which is high in universality and based on MSC. PATRAN / NASTRAN environment. External load (wind load and mass inertia force) is applied according to a full airplane mooring balance equation; the mooring load calculation situation is comprehensively and meticulously divided, so that the purpose of automatically screening and judging bearing mooring cables and the maximum mooring load is achieved on the premise of without changing the airplane and a motion platform deck model, and the work efficiency and the solving accuracy are improved.

Description

technical field [0001] The invention belongs to the technical field of aviation, and in particular relates to a method for calculating the mooring load of a fixed-wing aircraft. Background technique [0002] The aircraft must be moored and anchored on the flight deck of the motion platform and in the hangar to ensure safe stationing under the motion state of the platform at all levels of sea conditions. In the past, land-based aircraft usually did not have a special airport mooring device, and generally only fixed with wheel chocks; while the aircraft used for the service of the motion platform must be equipped with a special mooring device, and in order to ensure safety, a certain degree of redundancy is used. From the perspective of load strength calculation, the design scheme belongs to the multi-degree static indeterminate mooring scheme. [0003] The loads of each mooring cable in the statically indeterminate mooring scheme are solved by the conventional finite element...

AI Technical Summary

Problems solved by technology

[0003] The loads of each mooring cable in the statically indeterminate mooring scheme are solved by the conventional finite element method. Since the flexible mooring cable can only bear the tensile load, but not the compressive load, when using the beam element and rod element FEM method to model and calculate, in the past, The trial and error method of manually adding or subtracting units is adopted, the solution efficiency is poor, and it is easy to miss the bearing unit

[0004] The mooring cable is extremely soft, but it is not a standard flexible body. It has the physical characteristics of only being able to bear tension, and is an energy dissipator, which brings certain difficulties to the establishment of the finite element model and simulation analysis.

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