轮胎花纹泵浦噪声评价方法及降噪结构设计

Evaluation of tyre pumping noise and design of low noise structure

以轿车子午线轮胎205/55R16为研究对象,建立了具有复杂花纹的轮胎有限元模型,利用Abaqus有限元软件模拟轮胎在路面上滚动的过程,得到轮胎滚动过程中接地区域花纹沟的体积变化情况,以此作为轮胎泵浦噪声分析的边界条件。在此基础上利用流体力学方法(CFD)对花纹沟槽的流场特性进行分析,并应用FW-H方程计算花纹的泵浦噪声。通过分析接地区花纹变形特点,提出将花纹沟体积变形速率作为花纹泵浦噪声的评价方法。结果表明,花纹沟体积变形速率可以准确地预测花纹泵浦噪声性能,在此基础上提出了花纹沟加强筋降噪结构,花纹沟加强筋可以增大花纹刚度、减小花纹变形,具有明显的降噪作用,泵浦噪声降低了3.68dB。

Taking the PCR tyre 205/55R16 as the research object, finite element analysis model with complex patterns was established. The volume change behavior of pattern grooves in the contact zone was realized by simulating the tyre rolling process with Abaqus software, which was used as the boundary conditions of tyre pumping noise analysis. On this basis, the flow field characteristics in the pattern grooves were analyzed using Computational Fluid Dynamics （CFD） method, and the FW-H equation was applied to calculate the pumping noise of the tyre pattern. By analyzing the pattern deformation characteristics in the contact zone, the evaluation methods of pattern pumping noise and pattern volume deformation rate were determined. The results show that the pattern volume deformation rate can accurately predict pumping noise. On this basis, low noise structure of pattern groove reinforcement ribs was put forward. The pattern stiffness was strengthened and the pattern deformation was decreased by using the reinforcement ribs, and the noise was reduced by 3. 68 dB.