The Strength Analysis Of The Fixed Point Of The Middle Seat Belt In The Rear Seat Of A Certain Model

In today's society with the development of automobile industry,the demand of passengers for the rear seats' safety is becoming higher and higher.Accurate analysis and calculation of rear seats' frame strength during the design phase can forecast the invalidation and weak positions of frame as soon as possible,can shorten the development cycle of product effectively,raise design efficiency and reduce the development cost.Strength test of safety belts' fixed points in the middle of rear seats should be verified on real automobile,which is unavailable during the design phase.So in this article I attempt to do simulation verification and analysis of rear seats' frame strength,using the finite element method.First of all,I build model of rear seats' data and other data of automobile around,using three-dimensional software CATIA;Secondly,I do geometric processing and data reduction,using software Hypermesh,and build finite element analytical model;And lastly,I do simulation analysis of finite element model,using LS_DYNA,then I will get strain contours of safety belts' fixed points on rear seats.I use strength theory and evaluation criterion of simulation model of safety belts' fixed points to Identify if the strength of safety belts' fixed points in finite element model can meet the requirements.I optimize and strengthen the carcase construction of rear seats,basing on method BEP and finite element analysis results.Final calculated results prove correctness of optimization strength of safety belts' fixed points in the middle of rear seats,basing on method BEP,which provides theoretical basis for structural design and evaluation of backrest frame and Body in White in follow-up projects.