Vehicle bumper structure optimization method based on particle swarm optimization algorithm

A particle swarm optimization and optimization method technology, applied in design optimization/simulation, calculation, instrument, etc., can solve problems such as the inability to realize the reasonable spatial distribution of the initial particle swarm, and the inability to optimize the structural parameters of vehicle components, so as to improve efficiency and overcome optimization problems. difficult effect

Active Publication Date: 2016-05-25
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, this technology cannot achieve a reasonable spatial distribution of the initial

Method used

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  • Vehicle bumper structure optimization method based on particle swarm optimization algorithm
  • Vehicle bumper structure optimization method based on particle swarm optimization algorithm
  • Vehicle bumper structure optimization method based on particle swarm optimization algorithm

Examples

Experimental program
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Embodiment 1

[0036] Such as figure 1 As shown, the specific steps of this embodiment include:

[0037] Step 1. Using Hypermesh as the pre-processing software platform, using LS-DYNA and ABAQUS as the solvers, conduct finite element modeling on the carbon fiber composite bumper, and conduct simulation analysis of strength conditions and low-speed collision conditions to obtain insurance The finite element model of the bar, the strength analysis simulation model and the low-speed collision analysis simulation model.

[0038] Such as figure 2 As shown, the finite element model of the carbon fiber composite bumper includes 85,000 elements, 30,000 nodes, including 10,000 shell elements, 750,000 tetrahedron solid elements, and 103 triangular elements (1.03% ) proves that the accuracy of the model is reliable.

[0039] Such as image 3As shown, the simulation analysis refers to, according to the strength requirements of the carbon fiber bumper and the low-speed collision safety requirements,...

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PUM

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Abstract

A vehicle bumper structure optimization method based on a particle swarm optimization algorithm includes the steps that bumper modeling is carried out, simulation analysis of strength working conditions and low-speed collision working conditions is carried out, a simulation model is obtained, sampling is carried out in an optimization design domain, and an approximation model is established; global sensitivity analysis is carried out on an established objective function according to a sensitivity analysis technology, and key variables are obtained; the optimization design domain is recognized according to a data mining technology to obtain a supplement zone; sampling is carried out in the optimization design domain and the supplement zone, and after the particle swarm optimization algorithm is run to obtain an optimization result, the optimization result is rounded into an engineering value to obtain an optimized bumper structure. By means of the method, optimization difficulty brought by strong nonlinearity of the collision working conditions and a large number of check working conditions is overcome, and the efficiency of optimizing the carbon fiber composite bumper structure is improved.

Description

technical field [0001] The invention relates to a technology in the field of vehicle bumper structure design, in particular to a vehicle bumper structure optimization method based on particle swarm optimization algorithm. Background technique [0002] Crashworthiness is an important consideration in automotive design. In most collision accidents, the bumper system bears the brunt and protects the body parts and passengers to a certain extent. Therefore, the bumper system needs to have a sufficiently high rigidity and energy-absorbing efficiency. Carbon fiber composite materials are widely used in the field of lightweight structural design because of their high specific strength, specific stiffness and collision energy absorption efficiency. Therefore, carbon fiber composite material bumpers are gradually developed and applied to vehicle structural integration. [0003] However, the nonlinear characteristics of carbon fiber composite materials, as well as many assessment co...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20Y02T10/40
Inventor 朱平刘钊秦兴元陈卫
Owner SHANGHAI JIAO TONG UNIV
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