Realization Method of Car Body Lightweight Structure Based on Particle Swarm Optimization Algorithm

Abstract

Provided is a particle swarm optimization algorithm based lightweight car body structure implementation method. The method comprises: by carrying out high-precision finite element modeling and collision condition simulation analysis on a specified car body, carrying out sampling on a obtained 40% frontal offset collision simulation model in a optimization problem design domain, establishing a Kriging approximation model, and using a deterministic coefficient to carry out precision verification on the Kriging approximation model, so as to obtain a high-precision Kriging approximation model; and identifying a constraint domain with a lower violation degree by using a data mining technology, obtaining an optimization result by using a particle swarm optimization algorithm, rounding the optimization result to a project value, and verifying whether the project value meets a collision condition requirement through finite element simulation calculation, so as to obtain an optimized lightweight car body design structure of collision condition. The method disclosed by the present invention operates efficiently, and can provide a high-precision lightweight body design approximation model.

Description

technical field [0001] The invention relates to a technique in the field of structural design of a car body, in particular to a method for realizing a lightweight structure of a car body based on a particle swarm optimization algorithm. Background technique [0002] With the global energy shortage and environmental pollution becoming more and more serious, safety, energy saving and environmental protection have become the themes of today's automobile industry. According to statistics, for every 10% reduction in vehicle weight, fuel consumption can be reduced by 6-8%, and emissions can be reduced by 5-6%. Body lightweight design has become an important way to save energy and reduce emissions. [0003] Moreover, automobile safety is crucial to reducing traffic accident fatalities, and collision safety is an important consideration in modern automobile body design. The lightweight design of car body structure based on the performance index of crash conditions is an important ...

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Problems solved by technology

[0009] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a method for realizing the light weight structure of the car body based on the particle swarm optimization algorithm, combines the initial population distribution of particles and the speed reset formula, optimizes the particle swarm algorithm, and applies it to the light weight structure of the car body Quantitative design, efficient optimization solution, overcome the optimization difficulties brought about by the strong nonlinearity and high dimensionality of collision conditions, and improve the optimization efficiency of the lightweight design of the car body

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