Research And Optimization Design On That Effect Of Crown Parameter On Grip And Durability Of Tire

With the rapid development of the passenger car industry,the driving performance of vehicles has attracted much attention.As the only contact part between the vehicle and the ground,tire determines the transfer characteristics between them.In the process of vehicle running,good grip performance needs tires,and tread wear and shoulder fatigue damage directly affect the durability of tires.As the main component of the tire,the parameters of the tire crown have an important impact on the above performance,but it is difficult for the traditional design method to achieve the coordinated improvement of tire grip and durability.Based on this,the research on the influence of crown parameters on the grip and durability of tires and the optimization design can provide theoretical basis and design ideas for the research and development of high-performance tires.The research object of this paper is 205/55R16 longitudinal groove tire,which is modeled and analyzed by Hypermesh and Abaqus software.The reliability of the model is verified by CS-88100 static loading testing machine.Furthermore,the evaluation indexes of tire grip and durability are put forward,and the finite element analysis of the model is carried out on this basis.Seven tire crown parameters,such as driving surface width,driving surface height and belt structure,are designed.Through simulation analysis,the distribution of tire ground contact pressure and the influence of each parameter on ground gripping and durability are obtained: The change of tread structural parameters has the most direct and effective influence on the distribution law of tire ground pressure,and the change of width and height of driving surface mainly affects the grip and wear of tire,which presents a contradictory relationship to a certain extent Tread rubber with high modulus can reduce wear and shoulder fatigue,but at the same time,it leads to the decrease of tire grip performance.The change of belt structure has a certain influence on the tightening degree of tire,thus changing the grounding state and affecting the durability of tire.Using SPSS to analyze the weight of the above parameters on tire performance,it is concluded that belt width,driving surface width,driving surface height and tread modulus have the most prominent influence on tire grip and durability.In order to improve the above-mentioned performance of the tire,four parameters were selected as design variables,a mathematical model was established by using DesignExpert software,and each parameter of the crown was optimized by response surface method,and the final results were verified by simulation.The conclusions are as follows: the response surface method has good optimization accuracy,improves the grip of tires,reduces the friction energy loss rate during braking,and reduces the strain energy density amplitude of shoulders by 5.96%,thus achieving the goal of improving the grip performance and durability of tires cooperatively.In view of the limitations of traditional tire design methods,the grounding data of cat’s paw grounding area and vertical reaction force at different speeds were obtained with the aid of Walkway pressure distribution test system and Olympus high-speed camera.The topological structure of cat’s paw is selected for analysis.The cross-sectional arc of palm cushion is extracted by reverse engineering principle,and the crown arc is bionic designed.Combined with orthogonal test design,the bionic design is extended from qualitative analysis to quantitative analysis.With bionic structure design,the tire grounding pressure distribution uniformity increases,the friction energy loss rate decreases,and the strain energy density amplitude decreases obviously.Further attempts were made to design the composite structure of response surface optimization structure and bionic crown arc structure,and it was found that bionic structure could further improve the above-mentioned performance of tire without changing the original optimization variables.The engineering application of bionics provides new design ideas and research methods for tire structure design optimization.