为了研究一种更适合岩石短时三轴蠕变特性的蠕变模型,在对蠕变试验曲线三元件广义Kelvin模型参数识别基础上,基于加速蠕变试验特性对黏塑性模型中的黏性元件进行了非线性改进,并将得到的非线性黏塑性模型与三元件广义Kelvin模型串联组成一个新的非线性黏弹塑性蠕变模型.结果表明,该模型可以同时表征岩石瞬时加载应变、衰减蠕变、稳态蠕变以及加速蠕变等蠕变特征.最后,基于BFGS非线性优化算法对该模型参数进行了识别,同时将模型拟合曲线与改进西原模型曲线进行了比较分析,验证了非线性黏弹塑性蠕变模型的正确性. In order to study a creep model that is more suitable for the short-term triaxial creep characteristics of rock, based on the identification of generalized Kelvin model parameters of creep test curve three elements, based on the characteristics of accelerated creep test on viscous components A new nonlinear viscoelasto-plastic creep model is established by connecting the nonlinear visco-plastic model and the generalized Kelvin model with three elements in series.The results show that the model can simultaneously characterize the transient loading strain, Steady creep and accelerated creep etc.Finally, based on the BFGS nonlinear optimization algorithm, the parameters of the model were identified, and the model fitting curve and the improved model of the Nishihara model were compared and analyzed. Correctness of linear viscoelastic plastic creep model.