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Method for designing bionic structure of vehicle roof cover reinforcing rib

A technology of structural design and roof cover, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as single cross-section shape, conservative rib structure design, etc., and achieve the effect of improving compressive strength

Active Publication Date: 2020-04-10
WUHAN UNIV OF TECH
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Problems solved by technology

[0003] Nowadays, the layout of reinforcing ribs mostly adopts the traditional horizontal and vertical orthogonal distribution, the cross-sectional shape is single, and the structural design of the entire rib is slightly conservative

Method used

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  • Method for designing bionic structure of vehicle roof cover reinforcing rib
  • Method for designing bionic structure of vehicle roof cover reinforcing rib
  • Method for designing bionic structure of vehicle roof cover reinforcing rib

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Embodiment Construction

[0026] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 As shown in Fig. 1, the 3D structural modeling of the roof of the car is carried out, and the mid-surface is extracted, the geometry is cleaned and the mesh is divided to obtain the finite element model of the roof.

[0028] Such as figure 2 As shown, the snow crushing resistance, compression resistance and dent resistance performance of the finite element model of the roof cover were calculated and analyzed respectively. Six degrees of freedom are fully constrained around the connection between the roof and the frame; for the anti-snow crushing performance, the roof is loaded with a uniform load, the direction is vertically downward, and the snow pressure thickness is 90mm and 160mm respectively. The snow thickness formula is:

[0029] Therefore, for the loading methods ...

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Abstract

The invention provides a method for designing a bionic structure of an vehicle roof cover reinforcing rib. Carrying out three-dimensional structure modeling on the upper roof cover of the vehicle andforming a finite element model; calculating and analyzing the snow collapse resistance, the compression resistance and the sinking resistance respectively; the flexibility is used as an optimization target; performing structural topological optimization on the roof model under a single working condition; a compromise planning method based on SIMP in a density method is adopted to carry out multi-objective topological optimization, modeling and performance analysis of a three-dimensional structure are carried out on formed new reinforcing ribs, and bionic design is carried out on a roof cover reinforcing rib structure in combination with a natural and ordered optimal structure achieved by dicotyledonous plant veins under the action of natural stress. According to the method, the non-convexoptimization problem is solved, the comprehensive influence of various working conditions on the roof cover structure is comprehensively considered, and the performance of the vehicle roof cover structure is perfected and improved by fully utilizing the existing structure in the nature.

Description

technical field [0001] The invention belongs to the technical field of automobile structure design, and in particular relates to a method for designing a bionic structure of a reinforcement rib of an automobile roof cover. Background technique [0002] The reinforcing rib is attached to one side of the "product", and it is a kind of additional rib attached to the side of the "product" in exchange for the superior performance of the entire product with a smaller mass. Compared with base plate shells, stiffened plate shells have greater rigidity, strength, and stability. Its vertical and horizontal distribution is more conducive to stress transmission and avoids stress concentration, so that it can overcome the problems of structural distortion and deformation caused by uneven stress caused by uneven wall thickness of the substrate shell. Reinforcing ribs are widely used in the fields of ships, construction, machinery and life applications. [0003] Nowadays, the layout of r...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/23G06F111/04G06F119/14
Inventor 徐峰祥王君瑶华林龚铭远邵天如
Owner WUHAN UNIV OF TECH
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