摘要
在确立了振荡压实动力学模型的基础上,对振荡压实过程中压路机的幅频特性进行了大量现场试验,提出了动力学模型中被碾压材料的刚度和阻尼的动态识别方法.通过对动力学模型的计算机仿真试验来模拟实际试验曲线,对不同的刚度和阻尼用试凑法求取拟合曲线,从而可确定出刚度和阻尼数值.研究结果表明,实际幅频特性的变化趋势凸显了振荡轮与热沥青混合料相互作用理论模型中二个自由度系统的特征,利用动态识别方法所确定的刚度和阻尼与压实过程中被碾压材料的实际变化趋势相近.
Based on established dynamics modal of oscillatory compaction,a amount of spot tests of amplitude-frequency characteristics of oscillatory roller have been finished during compaction,the identification method of the stiffness and the damp of compaction materials in the dynamics modal is raised.Through computer simulating the actual test curve with computer,using cut and try method to get the simulation fitting curves,different stiffness and damp can be determined.The results show that the change trend of ac...
出处
《郑州大学学报（工学版）》
CAS
北大核心
2009年第1期156-160,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家“973”计划资助项目(2006CB605005)
关键词
幅频特性
动力学模型
刚度和阻尼
计算机仿真
振荡压实
amplitude-frequency characteristics
dynamics modal
stiffness and damp
computer simulation
oscillatory compaction
