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Method for carrying out finite element parametric modeling on triangular grid stiffener cylinder structure

A parametric modeling, reinforced cylinder technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the complex structure, can not achieve high-precision optimization design, lack of triangular mesh reinforced circle problems such as tube structure, to achieve the effect of good unit quality, rapid optimization analysis, and high speed

Active Publication Date: 2015-06-03
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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Problems solved by technology

However, due to the complex structure, there is currently no effective parametric finite element modeling method for triangular mesh reinforced cylindrical structures, and it is impossible to achieve high-precision optimal design based on finite element analysis

Method used

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  • Method for carrying out finite element parametric modeling on triangular grid stiffener cylinder structure
  • Method for carrying out finite element parametric modeling on triangular grid stiffener cylinder structure
  • Method for carrying out finite element parametric modeling on triangular grid stiffener cylinder structure

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Experimental program
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Embodiment

[0079] Using the MSC.PCL language, a script program for the parametric modeling of the triangular mesh reinforced cylinder structure is compiled. On this basis, the parametric modeling can be completed in only two steps, such as figure 1 Shown:

[0080] 1) Fill in the main design parameter values ​​of the model at the beginning of the parametric modeling script program, including cylinder height H, outer radius R, skin thickness t, number of circumferential grids n, rib intersection angle θ, rib A total of 7 bar height h, width w, etc.;

[0081] 2) Running the script program in Patran can automatically complete the finite element modeling.

[0082] Take a radius R=850mm, height H=800mm, number of grids per week n=36 grids, skin thickness t=3mm, rib height h=8mm, rib width w=4mm, rib crossing angle θ = 60°, the material is aluminum alloy (elastic modulus is 70GPa, Poisson's ratio 0.3), and the triangular mesh reinforced cylinder structure subjected to axial pressure of 1000kN...

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Abstract

The invention provides a method for carrying out finite element parametric modeling on a triangular grid stiffener cylinder structure. According to the invention, the method for carrying out parametric modeling on the triangular grid stiffener cylinder structure is established and is realized by using MSC (Mobile Switching Center).PCL (Pinter Control Language) programming, modeling parameters comprise seven parameters of height H of a cylinder, external radius R, covering thickness t, circumferential grid number n, rib crossing angle theta, rib height h and width w, a finite element analysis model can be quickly established by any combination of the seven parameters on the premise that reasonable combination is met, and the time for carrying out modeling on a daily microcomputer is about five seconds through actual measurements. The method provided by the invention has the advantages of high modeling automation level, quick speed, good element mass and high analysis accuracy; high-accuracy and fast-optimization analysis on the triangular grid stiffener cylinder structure can be realized by matching optimization design software such as Isight.

Description

technical field [0001] The present invention proposes a method for automatic parametric finite element modeling of a triangular grid-reinforced cylinder structure, which is suitable for the structure of missile weapon shells and storage tank sections using triangular-grid reinforced cylinders. Fast finite element modeling analysis and optimization design work based on parametric modeling. Background technique [0002] The parametric finite element model of the structure is established through parametric modeling technology, and the model is packaged and called by optimization software such as Isight, and the high-precision optimal design of the structure can be realized under the scheduling of its optimization algorithm. [0003] The triangular mesh reinforced cylinder is light, high-strength, and has a high load-carrying capacity. It is widely used in structural forms such as missile weapon casings and propellant storage tank sections. [0004] The optimal design of the tr...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王立朋朱振涛曹昱闫冰佟文敏王婧超王江徐卫秀吴浩王斌
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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