基于航空子午胎刚度仿真的动态磨损监控研究

Dynamic Wear Monitoring Based on Stiffness Simulation of Aircraft Radial Tire

针对航空轮胎磨损监控中因胎顶膨胀量变化导致监控结果不准确的问题,考虑到航空轮胎胎内帘线的高强度、正交各向异性和小拉伸变形,在Abaqus软件中采用Yeoh橡胶本构模型和Rebar帘线加强筋单元建立了B737-800民航飞机主子午线轮胎的三维非线性有限元模型。应用自适应接触的拉格朗日算法,成功模拟了轮胎与机场路面之间的静态接触问题。仿真得出了径向轮胎刚度、接地印痕、主磨损区域和下沉量,得出的胎顶膨胀量变化曲线解决了磨损监控中传感器动态阈值制定的问题,提高了监控准确度。通过比较检验,验证了仿真结果的可靠性。

During the wear monitoring for the aircraft tire, the expansion change on the top of tire crown caused inaccuracy for the monitoring results. Considering the aircraft tire cord with high strength, orthogonal anisotropy and tensile deformation, the main three dimensional nonlinear finite element model ofB737-800 passenger aircraft radial tire was built using the Yeoh rubber constitutive model and the Rebar stiffener unit in Abaqus software. The problem of static contact between aircraft tire and road was successfully simulated using adaptive Lagrange algorithm. Radial tire stiffness, ground imprinting, main area of friction losses and sinkage were obtained by simulation. The problem of the dynamic threshold of sensors during the wear monitoring was solved by the variation curve of the top of tire crown inflation; while the accuracy for monitoring results was improved. The simulation results were compared with the calculated data and the result indicated that the model＇ reliability was fairly good.