Abstract
As the world automotive crash safety regulations are different, it’s very important to design the energy absorbing structures that satisfy different collision boundary conditions. A large number of vehicle energy absorption beams dimensions were measured and then a common thin-walled rail was chosen. Considering the complexity of automobile collision boundary, finite element analysis and experimental design, interval uncertain algorithms, Kriging approximate model, NSGA - II genetic algorithm were combined to optimize the structure of the thin-walled rail with different impact velocity and different impact angle. Then the Pareto optimal solution was obtained. Thin walled beam after optimization has good energy absorption characteristics under different collision boundary conditions. Research results provide a method for the designing of a car that meets various crash regulations at the same time.
Highlights
The thin-walled rails are the main components of the automobile bearing structure
To design the thin-walled rail energy absorption structure that enables vehicles to possess rather stable characteristics of energy absorption with any possible collision boundary conditions is the key in this paper
The optimized thin-walled rail structure is available to warrant excellent energy absorption attributes under various collision boundary conditions
Summary
The thin-walled rails are the main components of the automobile bearing structure. Their quality is small, while the axial strength is higher. The thin-walled rails can provide stable axial compression force and they have good energy absorption characteristics. These rails play the most important role in absorbing crush energy during vehicle collision. Many experimental and theoretical studies have been carried out on plastic collapse of thin-walled rails of various sizes and materials by the domestic and foreign scholars [1] These studies are mostly based on a specific impact of regulations. To design the thin-walled rail energy absorption structure that enables vehicles to possess rather stable characteristics of energy absorption with any possible collision boundary conditions is the key in this paper
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