| Tire is the only part,the car and the ground contact for car riding,transportability and maneuverability performance has a lot of determination,pneumatic tire abandoned the traditional inflatable tire and explosive,easy to drill and pressure maintenance and cannot meet the defects in the use of special operating conditions,in order to meet the requirements of different use conditions,in recent years,gradually pneumatic tire research interest.In this paper,based on the excellent characteristics of the kangaroo lower limb structure,we designed a flexible and spoke bionic support structure using the basic principles of bionics.This study adopts the soft wheel bionic supporting unit body by using the Kangaroo scaling method in CATIA 3D software for the Kangaroo scaling method of certain size in proportion to bone structure to simplify the model configuration strategy for creating unit configuration method.Build and use finite element simulation software HYPERMESH soft mesh as radial bionic support unit cell.Pre-treatment Mesh parts were imported into the finite element simulation software ABAQUS,and formed a circular array of 36 groups of the flexible spoke bionic support units to form biomimetic support bodies.The biomimetic support is made of polyurethane and the biomimetic support is established as a rulebook for rubber treadle and assembled with an aluminum wheel hub to form the flexible spoke bionic non-pneumatic tire model 195/50N16.The stiffness coupling model of flexible spoke bionic non-pneumatic tire was established,and the accuracy of the theoretical model was verified by finite element simulation.By comparing the 195/50N16 flexible spoke bionic non-pneumatic tire with the traditional inflatable tire of the same type,the vertical stiffness,longitudinal stiffness,lateral stiffness,and torsion stiffness of the two kinds of tires have been studied,and the static characteristics of the two kinds of tires have been analyzed.The finite element simulation results were compared with the experimental results.At the same time,the static mechanics study analyzed the influence of the ground position of flexible spoke bionic support on the bearing characteristics and the position and size of the stress distribution of tire,found the maximum strain node and the peak stress node to prepare the random vibration characteristics study.Based on this,the difference of ground pressure distribution of flex-spoke non-pneumatic tire and a traditional pneumatic tire under different loading conditions was analyzed.By means of dynamic simulation,the riding sensation of flexible spoke bionic non-pneumatic tire under different speed conditions was studied.Next by ABAQUS finite element simulation software in the federal death penalty bionic non-pressure tire modal analysis,through the parameter method of combining different tire modal vibration modes,the research support department structure bionic and reflector thickness,Using orthogonal experimental method to calculate the thickness of the tread,wearing layer structure design parameters of the impact of each order natural frequency,simultaneously study the structure of different material density of grinding radial bionic non-pneumatic tire primary natural frequency of the contribution amount.Finally,the displacement vibration analysis by MATLAB,make 85 km/h speed into B and C class road spectrum,and then take the data after data processing at the ORIGIN through Fourier transform,the displacement power spectral density of two kinds of road spectrum conditions,displacement power spectral density of key nodes,Analyze the law of accelerating power spectral density and stress power spectral density,and random vibration characteristics.The analysis results were imported into n Code software for fatigue analysis to study the random vibration fatigue life characteristics of flexible spoke non-pneumatic tires.The results showed that the non-pneumatic tire has practical value. |
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