Honeycomb equivalent unit and parameter calculation method based on honeycomb equivalent unit

Abstract

The invention discloses a honeycomb equivalent unit and a parameter calculation method based on the honeycomb equivalent unit, and the method comprises the steps: taking an upper panel, a lower paneland a core layer as a whole, cutting out a hexagonal combined unit body, carrying out the integration along each axis through employing an energy method, and solving the equivalent parameters of the honeycomb equivalent unit; wherein the equivalence principle is that the same displacement and deformation are generated when the same horizontal force in the x direction and the y direction is appliedto the unit bodies before and after equivalence. The torsional rigidity of the equivalent unit in the z-axis direction and the bending rigidity of the equivalent unit in the x-axis direction and they-axis direction should be equal to those before equivalence. The number of the honeycomb equivalent units is in one-to-one correspondence with the number of the honeycomb grids in the honeycomb corelayer, and compared with traditional shell unit or entity unit analysis, the number of the units can be greatly reduced, and the calculation efficiency is remarkably improved. The core layer and the panel are equivalent as a whole, so that errors caused by layering equivalence are reduced, and the calculation result is more accurate.

Description

technical field [0001] The invention relates to a honeycomb panel structure and a finite element analysis method in the field of civil engineering, in particular to a hexagonal honeycomb equivalent unit, and also to a parameter calculation method based on the honeycomb equivalent unit. Background technique [0002] The aluminum alloy honeycomb panel composed of upper and lower layers of aluminum alloy panels and an aluminum honeycomb core in the middle has the advantages of light weight, high rigidity, sound insulation, and heat insulation. It can be said that it is a typical representative of high-performance plates with light weight and high strength characteristics, so it is widely used in aerospace, high-speed trains and large-span space structures and other fields. [0003] However, due to the particularity of its internal structure, the calculation and analysis of this type of structure is very troublesome. At present, when using common large-scale structural analysis...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing plate and shell units are not suitable for analyzing large-scale honeycomb panel structures, the purpose of this invention is to provide a new type of efficient honeycomb equivalent unit, which can be applied to the finite element calculation and analysis of honeycomb panel structures , another object of the present invention is to provide a parameter calculation method based on cellular equivalent units,

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