钢-橡胶辊对滚过程中橡胶层刚度和阻尼特性分析

    Analysis of Stiffness and Damping Characteristics of Rubber Layer During Steel-Rubber Roller Rolling

    • 摘要: 为了确定钢-橡胶辊挤压对滚过程中橡胶层的动态特性, 对橡胶材料进行单轴拉伸和动态机械分析(dynamic mechanical analysis, DMA)实验, 对实验数据进行拟合分析, 叠加三参数Mooney-Rivlin超弹模型和5阶Prony级数形式广义Maxwell黏弹模型建立橡胶材料的超弹-黏弹本构模型。通过有限元仿真得到动态加载下橡胶层的力-位移滞回曲线, 并计算分析不同载荷、转速、橡胶硬度和橡胶层厚度下的橡胶层动刚度和等效阻尼比。分析结果表明, 橡胶层动刚度随着载荷、转速和橡胶硬度增加而增加, 随着橡胶层厚度增加而减小。等效阻尼比随着载荷和层厚增加而增加, 随着转速和橡胶硬度增加而减小。橡胶硬度和橡胶层厚度对橡胶层的动刚度和等效阻尼比有显著影响, 在设计过程中需要重点考虑。

       

      Abstract: To determine the dynamic characteristics of the rubber layer during the process of steel-rubber roller squeezing and rolling, the uniaxial tension and dynamic mechanical analysis (DMA) experiments were conducted on the rubber material, the experimental data were fitted and analyzed, and the hyperelastic-viscoelastic constitutive model of rubber material was established by superimposing the 3-parameter Mooney-Rivlin hyperelastic model and the 5-order Prony series generalized Maxwell viscoelastic model. The force-displacement hysteretic curves of the rubber layer under dynamic loading were obtained by finite element simulation, and the dynamic stiffness and equivalent damping ratio of the rubber layer were calculated and analyzed under different loads, rotating speeds, rubber hardness and thickness of the rubber layer. Results show that the dynamic stiffness of the rubber layer increases with the increase of the load, rotational speed and rubber hardness, and decreases with the increase of the thickness of the rubber layer. The equivalent damping ratio increases with the increase of the load and thickness of the rubber layer, and decreases with the increase of the rotational speed and rubber hardness. The rubber hardness and the thickness of the rubber layer have significant effects on the dynamic stiffness and equivalent damping ratio of the rubber layer, which need to be considered in the design process.

       

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