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基于低温动三轴试验,研究人造多晶冰在轨道交通分级循环荷载作用下的本构关系与动力学参数指标。在不同负温、频率条件下,考察试件轴向动应力–应变关系曲线,获得冰的动力本构关系可以用线性黏弹性模型描述;动弹性模量随着温度的升高而降低,随频率增大而增大;黏性系数随着温度的升高而增大,随频率增大而减小的结论;并合理解释了温度、频率对冰的动力学参数指标的影响机理。
Based on the low-temperature dynamic triaxial test, the constitutive relation and kinetic parameters of artificial polycrystalline ice under the cyclic loading of rail transit were studied. Under different conditions of negative temperature and frequency, the dynamic stress-strain curves of the specimens are investigated. The kinetic constitutive relation of the ice can be described by the linear viscoelastic model. The dynamic elastic modulus decreases with the increase of temperature. The frequency increases and increases; the viscosity coefficient increases with increasing temperature and decreases with increasing frequency; and the mechanism of temperature and frequency on the kinetic parameters of ice is reasonably explained.