Abstract
To improve the efficiency of solving vehicle collision velocity and provide sufficient evidence for the identification of accident responsibility, we proposed a method combining the momentum equation and finite element simulation. We built a finite element simulation model of a vehicle where multiple collision simulation experiments were carried out, and studied the calculation method of collision deformation. After fitting and analyzing the simulated deformation data of an accident vehicle under different velocities through collision simulation experiments, a relationship model between collision velocity and deformation was established, and a method to solve the collision velocity was proposed by combing the existing two-dimensional collision momentum equation of the vehicle. For actual collision cases, the proposed velocity solution method and the simulation software were used for reconstruction analyses, respectively, and the results of the instantaneous contact velocity of vehicle collision were compared. It was found that the velocity calculation results obtained using the two methods above were in good agreement; the shape and depth of the simulated deformation were consistent with the actual deformation of the vehicle.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
Through the finite element simulation experiment, it is found that the simulation experiment is consistent with the actual deformation parts and deformation range of the vehicle
The case shows that the results obtained using this method are in good agreement with those study shows that the results obtained using this method are in good agreement with calculated with PC-Crash software, and the and errorthe is within reconstruction results those calculated with PC-Crash software, error is5%; within
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Based on actual accident cases, PC-Crash software was used to simulate the accident and verify the effectiveness of the vehicle-to-vehicle collision dynamics model [4,5] On this basis, Inhwan et al proposed an analysis method based on qualitative vehicle collision mechanics using the law of conservation of momentum [6]. Zhiqiang et al, using PC-Crash simulation software and the principle of energy and momentum conservation, analyzed the relationship between total deformation energy and velocity before collision, and proposed an energy-based model for calculating the side impact velocity of a vehicle, of which the validity was verified using numerical simulations [9]. Used the method of combining neural networks and finite element analysis to simulate vehicle collision accidents and found that the application of neural networks can improve the simulation efficiency; obtaining the relationship between initial vehicle collision parameters and deformation. The empirical results have important theoretical significance in revealing the formation mechanism of vehicle collision deformations and developing a theory of accident-reconstruction analysis, and have important value for practical applications in improving the level of accident reconstruction analysis and accident handling as well as the determination of responsibility
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