振动沉桩过程的动力学仿真分析  

Dynamic simulation of a vibratory pile driving process

作　　者：李小彭[1] 段泽亮[1] 李涛[1] 闻邦椿[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004

出　　处：《振动与冲击》2012年第7期24-26,38,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50805020);中央高校基本科研业务费专项资金项目(N090403004)

摘　　要：振动沉桩过程是一个非常复杂的过程,其复杂性源于土的动力性能和桩-土接触面的动力接触行为。应用D-P准则,借助ANSYS软件,建立桩-土系统有限元模型,选取合适的桩-土系统参数,并得出在该参数下的桩位移曲线。改变激振力振幅、频率及土的内摩擦角、粘结力和压缩模量等参数值,得出相应参数下的桩位移曲线。通过对比原参数下的桩位移曲线与改变参数后的桩位移曲线,得出激振力幅值、频率以及土的刚度和阻尼对沉桩速度和沉桩量的影响。Vibratory pile driving process is very complex. In order to analyze the dynamic behavior of a vibratory pile driving process, the simulation model of the pile-soil system was created with the finite element software, based on suitable parameters of the pile-soil system and the D-P criterion, the displacement curve of the pile was obtained. Then, the parameters of exciting force and soil were changed to obtain the displacement curves of the pile. Through comparison between the curves, the influences of parameters of exciting force and stiffness and damping of soil on the pile driving process were shown.

关 键 词：振动沉桩 有限元 接触面 动力学 

分 类 号：TH237[机械工程—机械制造及自动化]