钢丝绳芯橡胶输送带本构模型参数辨识与变化规律分析

摘要

橡胶输送带模型参数辨识是研究大型带式输送机动态特性的关键问题.首先采用黏弹性动力学理论和傅里叶级数拟合方法推导并建立了橡胶输送带标准固体模型的参数辨识方程,并通过实验对辨识方程进行了验证;然后对不同加载条件下实验数据的辨识结果进行了二次多项式拟合,分别获得了加载位移幅值、频率对输送带本构模型参数的影响规律.结果表明:随着加载幅值的增大,黏性系数具有先减小后增大的变化规律,弹性模量E1小幅度增大、E2大幅度增大趋势,随着加载频率的增大,黏性系数、弹性模量E1、E2均逐渐减小;最后,通过实验对拟合公式的准确度进行了验证.%The parameter identification of a rubber conveyor belt model is the key problem in researching the dynamic characteristics of large belt conveyors.The parameter identification equation of the standard solid model for the rubber conveyor belt was derived by employing the viscoelastic dynamics theory and the Fourier series fitting method, and was validated by experiments.The quadratic polynomial fitting was performed on the identification results of experimental data under different load conditions.The influences of the load displacement amplitude and frequency on the constructive model parameters of the conveyor belt were analysed.The results show that with the increase of load amplitude, the viscosity coefficient first decreases and then increases, the elastic modulus E1 increases by a small amplitude, and the elastic modulces E2 increases by a large amplitude quickly.With the increase of load frequency, the viscosity coefficient, the E1 and E2 decrease gradually.The accuracy of the fitting equations was validated by experiments.