斜向激振模式下振动轮滞回耦合特性分析

发布时间：2018-02-15 20:00

本文关键词： 智能振动压路机斜向激振模式滞回模型滑转跳振耦合特性　出处：《振动与冲击》2015年22期 　论文类型：期刊论文

【摘要】：据斜向激振模式下振动压实土壤的水平、垂直两方向滞回恢复力与位移间所呈不同滞回形态,考虑土壤密实度较高时振动轮在土壤面层水平方向发生的脱耦打滑、垂直方向发生脱耦跳振现象,采用仅据土壤特性参数的水平对称、垂直不对称滞回模型,分阶段按工况建立系统动力学方程;在一次近似前提下,利用谐波线性法将非线性作用力线性化为等效刚度及等效阻尼。通过数值计算,研究斜向激振下振动轮水平、垂直方向非线性滞回响应及相互耦合特性,分析压实进程中振动轮发生连耦、滑转及跳振工况下响应特性及工况相互转换规律。结果表明,压实进程中合理调整激振参量,一定程度可避免振动轮发生跳振、打滑现象,从而保证压实质量、效率及驾驶舒适性。
[Abstract]:According to the horizontal vibration compaction of soil under the oblique excitation mode and the different hysteretic shape between vertical hysteretic recovery force and displacement, considering the decoupling and skidding of vibration wheel in the horizontal direction of soil surface when the soil density is high, The phenomenon of decoupling and jumping occurs in the vertical direction. Based on the horizontal symmetry and vertical asymmetry hysteretic model of soil characteristic parameters only, the dynamic equation of the system is established by stages according to the working conditions. The nonlinear action force is linearized into equivalent stiffness and damping by harmonic linear method. The horizontal and vertical nonlinear hysteretic response and mutual coupling characteristics of vibration wheel under oblique excitation are studied by numerical calculation. This paper analyzes the vibration wheel coupling in the compaction process, the response characteristics of the vibration wheel under the sliding and jumping conditions and the law of mutual conversion of the working conditions. The results show that reasonable adjustment of the excitation parameters in the compaction process can avoid the vibration jump and slip of the vibration wheel to a certain extent. To ensure compaction quality, efficiency and driving comfort.
【作者单位】：福建农林大学机电工程学院;福州大学机械工程及自动化学院;
【基金】：国家自然科学基金资助项目(51175086) 福建省自然科学基金项目(2013J01171) 校高水平建设重点项目(612014017)
【分类号】：U415.521

【共引文献】