Papers by Keyword: Occupant Protection

Abstract: This study presents the numerical and experimental interior head impact analysis of automotive instrument panel according to the United Nations Economic Commission for Europe Regulation 21 (ECE R21). To minimize the possible injury risk for unrestrained front seat passengers due to the interior head impact with the instrument panel, the panel design needs to meet the ECE R21 standard which defines a pendulum-type head form as the impactor. The measured acceleration response of the head form should not exceed 80g continuously for more than 3ms. Motivated by the need to develop a simulation-based technique to evaluate the design of the instrument panel, a numerical model based on the explicit dynamic finite element analysis (FEA) by using the commercial FEA solver, LS-DYNA, is developed. To minimize the experimental cost, a gravity-based impactor with a smaller impact speed is develop as the test apparatus for verification purpose. The simulated results agree well with the experimental data; the average accuracy for the maximum value of impact acceleration at the head form is 95.4%. After the verification, the standard test conditions (with higher impact speed) are performed to evaluate the design. The outcome of this study can provide an efficient and cost-effective method to predict and improve the design of the instrument panel for interior head impact protection.

Abstract: Electric vehicle (EV) maybe exist electricity leakage phenomenon during the side pole impact. so it not only to be meet the requirements of occupant protection, but also to be meet the requirements of electric safety. In this paper, according to the relevant standards, An electric vehicle side collision column test was done. It was pointed out that the EV design shortcomings and put forward the improvement direction by the test results analysis.

Abstract: In this study, an occupant restraint system model of a production SUV developed in MADYMO software was used for crash simulations. Component tests were conducted to obtain the parameters of seatbelt and seat. Parameters of airbag were obtained by tank tests and the airbag model was validated by headform drop tests. The occupant restraint system model was validated against results from real vehicle crash tests. Robust design method was adopted for sensitivity analysis and system optimization. Two parameters, spool effect of the seatbelt and mass flow of the airbag, were studied to improve the occupant protection. Better protection performance has been obtained using optimized parameters, and the robustness of the optimized result was proved by robustness assessment.

Abstract: Based on interior configurations of railway vehicle of China and simulation using modeling of MADYMO Hybrid III 50% Dummy, the occupant injury of interior impact in railway crash events is analyzed according the European and American standard. The results indicated that in the face to face seating without table, the injury is serious then face to back and face to face with table .The other affect factors are the stiffness of interior equipment and the distance of seats. It is needed to optimize the parameter of interior equipment to reduce injury risk for the occupants under collision scenarios. At last the suggestions and methods for railway vehicle occupant safety protection are put forward in the paper.