对原状黄土（ Ｑ４） 施加４ 种频率的等幅正弦波荷载进行动三轴试验，研究振动频率对原状黄土动本构关系的影响．结果表明，对应于４ 种频率的原状黄土的动本构关系均服从双曲线模型，但试验常数ａ 、ｂ 均随振动频率的增大而略有减小．讨论了试验常数、动弹性模量和阻尼比等随振动频率的变化规律 A dynamic triaxial test was carried out on the equivalent amplitude sinusoidal load applied to the intact loess (Q4) at four frequencies to study the effect of vibration frequency on the dynamic constitutive relationship of intact loess. The results show that the dynamic constitutive relations of undisturbed loess corresponding to the four kinds of frequencies are subject to the hyperbolic model, but the experimental constants a and b decrease slightly with the increase of the vibration frequency. The variation of test constant, dynamic elastic modulus and damping ratio with vibration frequency are discussed