Finite element simulation method of beam_plate shell structure

Abstract

The invention relates to a finite element simulation method of a beam_plate shell structure. The finite element simulation method comprises the steps of establishing the research of a beam unit and a plate shell unit, and a finite element model; determining the boundary conditions of a beam_plate shell model; carrying out strength calculation and mode analysis; and evaluating the calculation result, wherein the establishment of the research of the beam unit and the beam_plate shell unit and the finite element model comprises the steps of researching the beam unit and setting real constants based on cross-section shape, namely carrying out parameterization on the beam_plate shell unit; researching the characteristics of the plate shell unit and the coupling characteristics of plate shell unit and the beam unit, namely coupling stiffness matrix degree of freedom; and creating the finite element model of the beam_plate shell structure by applying the parameterized beam_plate shell unit and the stiffness matrix degree of freedom. The finite element simulation method has the advantages of good grid quality, intuitive result and the like, and is beneficial to promoting the design level, shortening the design period, reducing the experiment expense, and reducing the potential fault danger.

Description

technical field [0001] The invention relates to an aero-engine structure simulation analysis technology, in particular to a beam-plate-shell structure finite element simulation method. Background technique [0002] Beam-shell structure is a relatively common design structure in engineering, and is widely used in the design of thin-walled parts, unit bases and sealed boxes. In order to ensure the safety and reliability of the structure, the traditional empirical design method usually adopts relatively conservative methods in material selection, specification selection, and structural scheme, which leads to bulky structures and increased costs. However, the common three-dimensional finite element method is used for finite element calculation and analysis of such structures. First, the number of networks is too large and the quality is low, so the accuracy of the results is doubtful; second, the calculation results are prone to local distortion, and the overall stress level of ...

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Problems solved by technology

For the situation where beams are connected in the middle of the double-sided slabs and the slabs are used as load-bearing parts, some scholars use the method of self-developed units and software for research, which is not universal and difficult in engineering practice; for beams as the main load-bearing parts Double-layer slab beam structure, the relevant research is still blank

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