Intensity check method based on cabin door detail model

Abstract

The invention relates to an intensity check method based on a cabin door detail model, and belongs to the field of airplane structural intensity design. The intensity check method comprises the steps of establishing a finite element model of the cabinet door firstly, and establishing a complete structure calculation model and a damage safety calculation model of the cabinet door according to the finite element model data; then performing calculation of static force to obtain node balance force calculation, board shell unit equivalent stress calculation, beam unit stress recovery point stress calculation and calculation of axial stress between a beam unit and a rod unit; further calculating to obtain data suitable for intensity check method calculation, comprising stress check operation stress of each structure and stability calculation operation stress of each structure; and meanwhile, calculating a stress check allowable value of each structure and a stability calculation allowable value of each structure, and performing comparison between the two allowable values to obtain safety margin of each structure. By adoption of the method provided by the invention, the intensity check operation based on the cabin door detail model can be completed; and the method is simple and reliable, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of aircraft structural strength design, in particular to a strength checking method based on a detailed model of a cabin door. Background technique [0002] With the development of civil aviation technology, airworthiness regulations have increasingly stringent requirements for aircraft doors, and correspondingly higher requirements have been put forward for door design. On the one hand, the mesh division of the finite element model of the hatch structure tends to be finer, but the detailed finite element calculation results are not suitable for the existing strength check method, and cannot be directly used for strength check, and must be further processed, and then The strength of the structure is checked; on the other hand, the calculation of the hatch structure needs to consider the damage safety condition of a single component failure. Due to the large number of damage parts that need to be considered, there are ...

AI Technical Summary

Problems solved by technology

On the one hand, the mesh division of the finite element model of the hatch structure tends to be finer, but the detailed finite element calculation results are not suitable for the existing strength check method, and cannot be directly used for strength check, and must be further processed, and then Check the strength of the structure; on the other hand, the calculation of the hatch structure needs to consider the damage safety condition of a single component failure, because there are many damage parts to be considered, resulting in a large number of damage safety calculation models

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