中文摘要：

振动压实下土壤滞回恢复力与位移呈现不对称滞回特性，考虑土壤密实度较高时振动轮易发生跳振现象，建立了基于土壤特性参数的不对称滞回模型，一次近似的前提下，利用谐波线性法将非线性作用力线性化为等效刚度和等效阻尼。通过数值仿真，对压实系统振动轮的非线性滞回特性进行了研究。结果表明：压实初期土壤处于弹塑性变形阶段，振动轮产生超谐波共振；压实中后期随着压实土壤的不断密实，振动轮产生亚谐波共振，标志着跳振的发生，一定条件下进入混沌状态；合理调整激振力和激振频率可以有效地抑制跳振，避免混沌运动。

英文摘要：

The resilience against displacement revealed asymmetrical hysteresis during the vibrato ry compaction. As the soil compactness was high enough, the jump vibration of vibration roller was produced. An asymmetric hysteresis model was established in terms of segmental line according to soil property parameters. According to the first order approximation, the equivalent damping cod{i- cient and equivalent stiffness coefficient were deduced through the harmonic linearization method. By means of numerical simulation, the hysteresis response characteristics of the drum were analyzed.During the beginning of vibration compaction, soil presents elastlc-plasuc cnaracteristics and superharmonics occur. With the increase of soil density during the ending of vibratory compaction, sub- harmonics may occur, which marks the occurrence of jump vibration. Under some conditions, chaos can be induced. Adjustment of excitation amplitude and excitation frequency can availably restrain jump vibration and chaos motion of the drum.