Nonlinear dynamic modeling and simulation of vibratory roller system
According to the experience of vibratory compaction, a nonlinear soil dynamic model was established. This model was used to elucidate the dynamic characteristics of different soil compacted processes including elastic-plastic nonlinearity and jump vibration. Based on the first-order approximation, the asymmetrical nonlinear hysteretic restoring force was expressed by equivalent damping and equivalent stiffness through the harmonic linearization method. The dynamic response of the two-DOF vibrating compaction system was derived by using the optimization method. By means of numerical simulation, the dynamic evolution of vibratory roller-soil system was studied. During the beginning of vibratory compaction, soil is in the elastic-plastic range, and roller keeps coupling with soil. At the ending of vibratory compaction, density of soil increases, sub-harmonics may occur while roller takes a jump vibration, and chaos could be induced by some special conditions. Adjustment of excitation amplitude and excitation frequency could availably control the jump vibration of roller and avoid the chaos response.
Guan Di Le-sheng Chen
The College of Mechanical Engineering, Fuzhou University, Fuzhou 350002, China
国际会议
The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)
上海
英文
1267-1272
2007-06-11（万方平台首次上网日期，不代表论文的发表时间）