Modeling And Performance Optimization Of Driver Restraint System Under Car Frontal Crash Condition

Along with the development of economy, the number of cars is rapidly increasing. Vehiclescan bring us convenience, as well as a growing number of accidents. Traffic accidents cause agreat number of casualties and property loss every year, which leading to a higherrequirement for the safety performance of cars. Among all of the accidents, frontal crashestake a large proportion. In order to reduce the injuries which occupants suffered during thefrontal crashes, restraint systems with good performance must be equipped in the cars.In this thesis, the significance of researching on vehicle passive safety and frontal crashes iselaborated, research status and contents are analyzed, and research methods are introduced,which includes simulated analysis, sled test and vehicle impact test.Rules and regulations about vehicle’s safety performance are made in many countries, in thisthesis, frequently-used assessment criteria and regulations about frontal crash test areintroduced.According to the requirement of C-NCAP, a frontal crash test is carried out, based on this test,a simulation model, which includes Hybrid III50th male dummy, vehicle, seatbelt and airbag,is built with the help of MADYMO.Based on the simulation model, optimization parameters are determined with the method ofsensitivity analysis. Then an optimum proposal for C-NCAP frontal crash test is achievedwith the help of orthogonal experimentation method and range analysis method. Finally, theprotection for Hybrid III5th female dummy of this proposal is checked.In this paper, an optimization method for restraint system in frontal crash at a speed of50km/h is found, which can provide a reference for analyses in other crash cases.