Structural Design And Optimization Of Non-pneumatic Tire Based On Robust Design

With the development of science and technology,people put forward higher requirements on the performance of tire,and the non pneumatic tire will become the future development trend of tire with its unique advantages.Compared with the traditional tires,non pneumatic tires in the choice of materials and structural design has a big difference.Materials,non pneumatic tire materials are mainly embodied in the spokes,this is because in the tire deformation,spokes is the main force,decides the performance of non pneumatic tire.In structure,non pneumatic tire generally includes two parts: spokes and tread,and the structure is simpler.Robust design is a kind of engineering method which can ensure the quality of products by adjusting the design variables and controlling their tolerances to the controllable and uncontrollable factors.In other words,is in the early stage of development and improvement of the product,through simulation and experiment to find out the influence factor,by changing the conditions of the optimal value,improve the product to make all the products meet the set objectives and requirements,and can greatly reduce losses and reduce cost.First of all,a new type of non-pneumatic tire is introduced,which is a rigid hub,a super elastic,spoke and shear belt with a certain radian.The shear is composed of three layers: an inner lining layer,a belt layer and a rubber layer.The rigid hub can provide a support function for the non-pneumatic tire,and ensure the stability of the non-pneumatic tire during the movement.The spoke is a kind of super elastic polyurethane material(PU material),which is a new type of organic polymer material.The role of shear band is to ensure the contact and stress of the tire and the ground,in which the role of the lining layer is fixed spokes,can be seen as the spokes and the outer ring buffer.The belt layer is to ensure the stiffness of the outer ring of the non-pneumatic tire,which can protect and support the outer ring,and the outer rubber layer is the guarantee of the contact between the tire and the ground.Secondly,combined with non-pneumatic tire structure,carried out a series of processing using 3D software and finite element analysis software,3D software to draw the nonpneumatic tire model,and then imported to the finite element analysis software set of materials,contact,boundary conditions and loading conditions,analysis and experiment results.Again,main factors influencing non static structure of pneumatic tire,the design method of robust parameter,select the target amount,based on the experimental results the experiments,establishment of orthogonal design table based on right angle,to quantitatively analyze the effect of the design factors on non-pneumatic tire performance.The influence of structure parameters on inflation the tire performance robustness to non,get the optimal parameters of tire level combination has the robustness of the target amount,to provide effective methods and theoretical support for the new tire characteristics and digital design.Finally,taking into account the influence of velocity and contact surface,the theory of robust design is applied to improve the performance of non-pneumatic tire.In the study of the performance of the ground,the friction between the tire and the ground is taken as the measure index.By improving the performance of the non-pneumatic tires,can solve a lot of rolling problems,is the main way to improve handling.In the non-pneumatic type,with smooth rolling,the spokes deformation,squeeze strain energy,this is the tire itself internal energy,and the belt as the main force components,the stiffness of the mechanical properties of the nonpneumatic tire has a great influence on optimization design,with a layer of beam to improve the comfort of the vehicle.