加力压桩液压系统的动力学建模与仿真  

Dynamics modeling and simulation of hydraulic system of pile driving under adding force

作　　者：周旭[1] 何清华[1] 朱建新[1] 贺湘宇[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2008年第2期322-326,共5页Journal of Central South University:Science and Technology

基　　金：国家"863"计划项目(2003AA430200)

摘　　要：为了便于对液压静力压桩机进行改进,介绍准恒功率液压静力压桩机的结构、工作原理、压桩过程,以及建立准恒功率液压静力加力压桩系统动力学模型的相关理论。分析准恒功率液压静力加力压桩过程,利用AMESim仿真平台建立准恒功率液压静力加力压桩系统的动力学模型,设置模型中的主要参数进行动力学仿真,并分析动力学仿真结果。仿真结果表明:增大升降油缸活塞直径,能减小压桩机加力压桩时的机身速度,增大压桩机加力压桩时的加速度;增大升降油缸活塞的初始高度,能减小压桩机加力压桩时的机身速度和加速度;降低压桩机升降油缸活塞的初始高度,或增大压桩机升降油缸活塞直径,均能减小压桩机加力压桩时压桩机的机身位移。To improve hydraulic static pile diver, the framework, working principle, process of pile driving of hydraulic static pile diver with quasi-constant-power and the pertinent theory of building the dynamics model of the hydraulic system of pile driving under adding force were introduced. The process of pile driving under adding force of hydraulic static pile diver with quasi-eonstant-power was analyzed. The hydraulic system of pile driving under adding force was modeled in AMESim, and the main parameters of the model of the hydraulic system were set. The dynamics simulation of the hydraulic system was achieved, and the simulation results were analyzed. The simulation results show that augmenting the piston diameter of lift cylinder reduces the velocity and adds to the acceleration of the platform of hydraulic static pile diver in the process of hydraulic static pile driving under adding force. Augmenting the initial displacement of piston of lift cylinder reduces the velocity and acceleration of the platform of hydraulic static pile diver. Reducing the initial displacement of piston of lift cylinder, or augmenting the piston diameter of lift cylinder, will reduce the displacement of the platform of hydraulic static pile driver.

关 键 词：液压静力压桩机 油缸 建模 仿真 AMESIM 

分 类 号：TU67[建筑科学—建筑技术科学] TP39[自动化与计算机技术—计算机应用技术]