Strength checking method based on cabin door detail model

Abstract

The present invention relates to a strength checking method based on cabin door detail door, and belongs to the field of airplane structure strength design. The method comprises: firstly, establishing a finite element model of a cabin door, and constructing a complete structure calculation model and a a breakage safety calculation model of the cabin door according to data of the finite element model; then, carrying out static calculation, so as to calculate node equilibrium force, equivalent stress of a shell element, stress of a stress recovery point of a beam element and axial stress between the beam element and a rod element; further carrying out calculation to obtain data applicable for calculation by the strength checking method, comprising stress checking work stress of each structure and stability calculation working stress of each structure; and calculating a stress checking allowable value of each structure and a stability calculation allowable value of each structure, and comparing the two values to obtain a safety margin of each structure. The method provided by the present invention can help complete strength checking based on a cabin door detail model, and the method is simple and reliable, and improves working efficiency.

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 hatch detail model. 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 a large numb...

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 checking method, and cannot be directly used for strength checking, 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

Images