考虑土体质量的振动压路机动力学模型研究

Research on Dynamic Model of Vibrating Road Roller Considering the Qualities of Soil Mass

将振动压路机振动系统简化为一个质点(振动轮)、两个自由度(水平方向和竖直方向)动力学系统,同时把土体的质量作为振动轮质点的附加质量,建立了单质点、两个自由度的动力学模型。通过求解振动系统方程,得到了质点运动轨迹的解析表达式,并利用数值分析方法研究了质点运动轨迹与各个参数之间的函数关系,讨论了各参数对运动轨迹的影响。研究结果表明,改变振动参数可实现对压实度的有效控制。在具体施工过程中,应根据被压实材料的性质,调整振动压路机的各振动参数以实现对振动工况的实时监测。

The vibration road roller system is simplified into a particle （drum） and two freedom degrees （horizontal and vertical directions） dynamic system. And at the same time, the qualities of soil mass can be taken as the additional quality to the vibrating particle point. Accordingly, a dynamic model with a single particle point and two freedom degrees is established. The analytical expression of the trajectory is obtained by solving the vibration equation of particle system. The functional relations between particle trajectories and various vibration parameters are studied by the numerical analysis. And the effect of parameters on the trajectory is discussed. Research results indicate that changing vibration parameters can achieve the effective controlling over compaction degrees. Accordingly, in the course of concrete construction, each vibration parameter of vibration road roller can be adjusted in terms of compacted material properties so as to achieve the real time monitoring of vibration operational conditions.