Abstract
This paper used the Hyper Mesh and LS-DYNA software to establish a dummy-seat finite element simulation model. The head, chest and neck injury of the dummy were analyzed respectively in the frontal impact and rear impact. It was indicated that modification of seat was needed to meet the requirements. The simulation results showed that the original model cannot provide effective protection for the occupants and need for structural improvements. According to the simulation results of deformation and stress conditions of the seat parts, the original seat structure was improved and optimized for four improvement schemes, including the structure optimization of the seat side panel, the center hinge, framework under the cushion and the backrest lock. The results indicated that the optimized seat improved the occupant protection performance by reducing occupant damage parameters compared with original seat, which illustrated that the optimization basically met the target.
Highlights
With the development of auto industry, the safety of the car has increasingly become an important research field of modern automobile development design [1] [2].As an important safety component, vehicle seat is a hot spot in the study of automobile safety and it provides a decisive protection for passengers [3]
Yang Hongying [5] analyzed that insufficient stiffness of seat cushion is the cause of human body diving in rear collision, which result in great damage on the abdomen in 2012
As to the recent research status abroad, Nicolas [6] established finite element models of multi-body human body and seat to study the safety of the crew in rear crash
Summary
With the development of auto industry, the safety of the car has increasingly become an important research field of modern automobile development design [1] [2]. As to the recent research status abroad, Nicolas [6] established finite element models of multi-body human body and seat to study the safety of the crew in rear crash. Research on vehicle seat in a front and rear collision mechanism of injury to the occupant can provide theoretical technical support for seat design, research and development. It can improve vehicle passive safety performance in a collision and have a great significance for traffic safety [9][11]. Based on a domestic car seat as research subjects, the HyperMesh and LS-DYNA simulation software were used in this paper to build a seat-occupant finite element model, and study the injury mechanism of the seat to occupant. The main purpose was to analyze the performance of the seat and the improvement and optimization of the structure, to improve dummy injury indicators, to provide effective protection, and provide a method for modern seat design and passenger protection evaluation
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