基于LS-DYNA的爆胎历程轮胎刚度特性仿真研究

Simulation of Tire Stiffness Characteristics during Tire Blow-out Based on LS-DYNA

基于LS-DYNA非线性有限元分析软件,采用壳单元模型模拟橡胶-帘线复合材料,建立215/60R16子午线轮胎有限元模型,并以不同充气压力模拟爆胎历程,分析不同充气压力下轮胎在垂向载荷、侧向载荷和纵向载荷作用下的变形。结果表明,轮胎刚度随充气压力降低而急剧下降,轮胎发生爆破后垂向刚度、侧向刚度和纵向刚度分别降到正常充气压力下的约30%,38%和40%。本研究获得的不同充气压力下轮胎三向刚度变化特性为爆胎车辆的动力学响应和操纵稳定性分析提供依据。

Based on nonlinear finite element analysis software LS-DYNA,using shell element model to simulate cord-rubber composite materials,the finite element model of 215/60R16 radial tire was established, and the tire blow-out process was simulated by different inflation pressure. Under different inflation pressure, the tire deformation at vertical,transverse and longitudinal load was analyzed. The results showed that the stiffness of tire declined sharply with the decrease of inflation pressure,and the vertical,transverse and longitudinal stiffness were reduced to about 30%,38% and 40% of normal inflation pressure after tire blowout, respectively. The three-dimensional stiffness variation characteristics of tire under different inflation pressures obtained in this study could provide a basis for the dynamic response and handling stability analysis of tire blow-out vehicl.