Comfort Evaluation And Seat Parameter Optimization Based On The Human-chair-vehicle Model

With the improvement of living standards,people pay more and more attention to enjoying life.Automobile products have entered every ordinary family,and its good comfort performance is favored by consumers.Car companies are committed to developing products with better comfort performance to improve the competitiveness of the company.Therefore,It is necessary to study the comfort of automobiles.This paper will take Riding comfortableness as research object,and optimize the parameters based on the comfort of automobile.This paper will analyze the comfort of the human body model based on the absorption power method,and optimize the dynamic parameters of the seat.Firstly,the appropriate lumped parameter model of human body was selected,by analyzing and comparing different human body models,and coupled the seat and the half-car model to establish the occupant-seat-vehicle system model.Secondly,the stochastic road irregularities model was established by using harmonic superposition method.The occupant-seat-vehicle system model was established to analyze the vibration response characteristics of human body caused by stochastic road irregularities model.The vibration response characteristics of human body caused by random pavement were analyzed by establishing a human-chair-car system model.Using MATLAB software programming,the random road surface is used as the system input,and the vertical acceleration of the human body model is used as the response.The human-chair-car system simulation analysis is carried out,and the correctness of the model is verified by using ADAMS software.Then,based on the absorption power method,the comfort evaluation of the model is carried out,and the dynamic response of each part of the human body under random road surface is obtained.The total absorbed power and the total absorbed power value are obtained by integrating the absorbed power of various parts of the human body,Comparing energy absorption under different vehicle speeds and different grades of road conditions.Finally,according to the multi-objective optimization algorithm,the human body absorption power is taken as the optimization target,and the seat stiffness and damping parameters are used as design variables to optimize the human-chair-car system model.The comfort of the human body model before and after optimization was evaluated by calculating and comparing the total absorbed power values.Reduced human body absorbed power by optimizing the designing the seat.According to the analysis results,the optimized human-chair-vehicle system model can greatly improve human comfort.Through this research,it is possible to improve the ride comfort of the occupants in the process of automobile development and design,and it has guiding significance for reducing the development cost of the automobile and shortening the development cycle.