加力压桩液压系统的动力学建模与仿真.pdfVIP

第39卷第2期 中南大学学报(自然科学版) 、，0l-39 No．2 2008年 4月 J．Cent．South Univ．(Science and Technology) Apr．2008 加力压桩液压系统的动力学建模与仿真 周 旭，何清华，朱建新，贺湘宇 (中南大学 机电工程学院，湖南长沙，410083) 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 A 苣Sim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。 关键词：液压静力压桩机；油缸：建模：仿真；AMESim 中图分类号：TU67；TP39 文献标识码：A 文章编号：1672．7207(2008)02-0322-05 Dynamics modeling and simulation of hydraulic system of pile driving under adding forcepile drisang Untier adding 10rce ZHOU Xu，HE Qing-hua，ZHU Jian-xin，HE Xiang-yu (School ofMechanical and Electrical Engineenng，Central South University,Changsha 410083，China) Abstract：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 pe~inent 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-constant-power Was analyzed．The hydraulic system ofpile 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 resulm show that augmenting the piston diam eter ofliR cylinder reduces the velocity and adds to the acceleratio