Study On Vibration And Noise Control Of Radial Tire

Today,vehicle NVH research has grown up.For cars,the tire’s vibration characteristics plays a vital role in ride comfort.The impact of tire on automobile is mainly divided into two aspects: vibration and noise.It is external excitation and its own response that the driving tire produces radiation noise.Therefore,in order to reduce the radial noise of tire vibration,so as to improve the performance of the whole vehicle,the Vibration characteristics and radiative noise of tires were studied in this paper.In this paper,the tire two-dimensional cross section is drawn firstly by SolidWorks,a three-dimensional drawing software,and then the 3-d solid model was obtained by rotating on this basis.The model is imported into ABAQUS environment with the interface of SolidWorks and the finite element simulation software ABAQUS.In there a tire practical finite element model was established by defining the model element type,material properties and meshing.Rubber matrix material was simulated by Neo-Hookean constitutive model material,and the cord of cord,wire,and belt was simulated by definition rebar unit during the modeling process.Firstly,based on the tire finite element model,the tire inflation and loading conditions are simulated by combining the actual loading conditions,and the influence of inflation pressure on modal parameters is discussed.Secondly,the static grounding and rolling tire models are established to analyze the performance of grounding tire.For the static tire,the deformation and stress changes of the static grounding tire under different subsidence conditions are analyzed.For the dynamic tire,the stress distribution of rolling tires in three states is discussed by simulating the braking,driving and steady rolling of tiresand the stress distribution of the rolling tire under braking,driving and steady rolling conditions.Finally,based on the analysis results of dynamic characteristics of tire structure,the tire acoustic model is established to study the tire vibration radiation noise.It is found that the results of deformation and stress distribution of the tire underthe conditions of inflation,loading and grounding are consistent with the actual situation.For the static grounding tire,the deformation of the ground part of the tire is roughly distributed symmetrically under the loading condition,and the deformation of the grounding area and the counter force of the tire increase with the increase of the tire subsidence under the same inflation pressure condition.The stress of the grounding area shows a trend of gradual expansion and decrease from the center to both sides,and under the same loading state,the stress distribution gradually passes from the ellipse to the rectangle as the inflation pressure increases.In addition,compared with the normal stress distribution of the static tire grounding area,the normal stress distribution appears to move forward when the rolling tire is under braking,while the stress distribution moves backward when driving,and the maximum stress in driving and braking is bigger than that in steady rolling state.Using finite element method to study the acoustic model for tire,get tire radiated noise mainly comes from the vibration of the tread and sidewall.In addition to appropriately improve the inflation pressure and material properties can control radiated noise,the design of low noise tire with damping materials on the tread and sidewall of tire is presented in this paper,and through the analysis of the current tire tread with adding damping material and vibration acceleration response of the tire,it is found that added damping materials can effectively reduce the vibration of tread and sidewall,which can effectively reduce the tire vibration radiation noise,and verify the feasibility of this design.