Performance Optimization Of Mid-Row Multifunctional Seats And Matching With Vehicle Body

As an important component of the occupant restraint system,car seats and seat belt assemblies play an important role in the safety of automobiles.The strength of the seat itself,the strength of the seat belt fixing point,and the strength of the connection between the seat and the body are important indicators of whether the seat can play its role in an automobile accident.Therefore,China has implemented a number of important regulations successively relating to the seat.Some of the tests in the regulations are destructive tests.The repetition of these tests will bring great cost pressure to the OEMs and delay the development of the entire vehicle.Therefore,in order to increase the passing rate of the entire vehicle in the destructive tests,it is necessary to carry out high-precision and stable simulation of the seats and the body according to the actual working conditions by means of the finite element analysis method.This thesis focuses on the mid-row multi-function seat to optimize the seat performance and to match the body.HyperWorks and Oasys-primer software were used to establish a mid-row multi-functional seat and body finite element model for an SUV upgrade model.According to the characteristics of the seat strength test,the explicit algorithm was selected for calculation,and the appropriate boundary conditions and loads corresponding to GB 14167-2013 and GB 15083-2006 were used to obtain seat belt anchorage strength and cargo retention simulation models.In consideration of the unfitness of the initial scheme of the middle row seats for the regulation,a comparative analysis of the plural optimization has been provided to fit the regulation with the analysis of the force transmission path and the stress-strain results of the seats.Then,the structural sensitivity analysis results of the seat were calculated,the seat performance and technology considered,a lightweight design scheme proposed,the performance verified.Finally,the seat simulation results are consistent with the test results,and their fitness of the regulations indicate that the performance of the mid-row multi-function seats is optimized and the simulation accuracy of the model satisfies the analysis requirements.In addition,the match of the multifunctional three-person seat and the vehicle body was studied to solve the problem that the one-time pass rate is low in seat belt fixing point strength tests for the newly-developed vehicle models.With the analysis of the mass production of four M1 models,the evaluation criteria for seat and body strength were established.The results are applied to the research and development of an MPV model which passes the safety belt fixed point strength test in a once.