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Crash Pulse Characterization for Restraints System Performance Optimization

Author: 
Alok Anand, Pratap Daphal, Pratyush Khare (TATA Motors)

CHALLENGE - The vehicle crash signature (or crash pulse) significantly affects occupant restraints system performance in frontal crash events. The objective of this study is to develop a process for crash pulse characterization which will be useful during the early phase of the product development. 

SOLUTION - The study has been undertaken for critical frontal crash load cases, with respect to single stage restraints components (airbags, seat belts). A sub system level sled test was simulated in MADYMO environment to calculate the dummy injuries for this study. MADYMO and modeFRONTIER coupling were used for analyzing the injury performance of occupants with all crash pulses. Injury level of occupant with different crash pulses as compared to baseline pulse is plotted as shown in Figures below. 

 

BENEFITS - A CAE methodology for crash pulse characterization is developed through an effective integration of the MADYMO, modeFRONTIER and DOE approach. The results show that optimum injury protection of occupant can be achieved with the crash pulse characterization process.

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