Structural Design And Optimization Of Car Door Beam

With China’s rapid economic development,the domestic car ownership is increasing, Atthe same time, in side impact collision of cars,the driver is more prone to injury,so it shouldbe a matter of concerned. Meanwhile, the international community have become increasinglydemanding for automotive safety. Therefore,the domestic car need to break through thetechnical barrier in automotive safety technology to expand the international market. It’simportant to study the car collision safety performance.In this paper, focused on the key absorbing energy component (door beam) in the front ofthe car door system as the object of study, possible ways of improving the performance ofanti-collision beam were analyzed. With the U.S. Federal Motor Vehicle Safety Standard(FMVSS214) and the related car crash static strength test requirements used, Fouroptimization methods were established for contrast. The modern design method ofoptimization was used to improve anti-collision beam structure. The following specifics theresearch works:Firstly, key technologies of the finite element simulation were studied, base on FMVSS214, Door collision system was created, the modern mainstream crash simulation softwareswere used to build the platform of the finite element simulation. Through Validation of thedoor collision system, proved that the finite element simulation platform is highly efficientand the door crash simulation system is reasonable.Secondly, Established anti-collision beam system.Made the Square cross-section doorbeam as the study, the Performance evaluation method of the anti-collision beam wasproposed and four design optimization of the bumper beams were explored. thicknessincreasing, trapezoidal cross-section beam, strengthen groove of the beam, the large roundbetween the beam-wall and the top edge. Focus from the SEA(Specific Energy Absorption),anti-collision force and beam lightweight for comparing. Finally, the trapezoidal cross-sectionbeam and the large round between the beam-wall and the top edge were chosenFinally, The two kinds of the optimization were combined.on the trapezoidalcross-section beam, Radius was designed.based on18sample points that obtained by averageseparation of single factor DOE, the proximate mathematical model of relationship betweenradius and SEA property is established by adopting the Moving Least Squares method. Then, using the proximate mathematical model to execute iterative optimization by FeasibleDirection optimization algorithm obtains the optimal radius value of the beam. The test resultsverify that the optimization method based on approximate mathematical model is feasible andeffective.Finally, the optimization results were compared with the initial data model. Provedthat the optimization results are good obviously.