It is known that time-dependent rheological deformation of rocks is influenced by cyclic disturbance loads. However, the stress relaxation behavior after cyclic disturbance is still poorly understood. To study such effects, a dynamic disturbance electrohydraulic servo triaxial test system was developed. A series of disturbance relaxation tests with different disturbance numbers and amplitudes were carried out on marble at several strain levels. The influence of cyclic disturbance parameters on the relaxation magnitude, relaxation rate, and peak stress was analyzed. Relaxation magnitude and relaxation rate after cyclic disturbance loads are larger than those of conventional relaxation. In addition, sensitivity analysis reveals that the relaxation magnitude is more sensitive to the disturbance amplitude. Damage variables defined by the plastic strain method can well reflect the evolution law of relaxation damage under different disturbance conditions. It is believed that the damage model constructed by Harris function can better describe the relaxation damage evolution law at various strain levels.

众所周知，岩石随时间变化的流变变形会受到周期性扰动载荷的影响。然而，对循环扰动后的应力松弛行为仍然知之甚少。为了研究这种影响，开发了一种动态扰动电液伺服三轴试验系统。在大理石上的几个应变水平上，进行了一系列具有不同扰动数和振幅的扰动松弛测试。分析了周期性扰动参数对弛豫幅度，弛豫率和峰值应力的影响。周期性扰动载荷后的弛豫幅度和弛豫率均大于常规弛豫。此外，敏感性分析表明，弛豫幅度对扰动幅度更为敏感。用塑性应变法定义的损伤变量可以很好地反映不同扰动条件下松弛损伤的演化规律。人们认为，由哈里斯函数构造的损伤模型可以更好地描述各种应变水平下的松弛损伤演化规律。