气动液压锤锤击系统建模与分析  

Modeling and Analysis of Pneumatic Hydraulic Hammer System

作　　者：訚耀保[1] 喻展祥 李文顶 林登 郭传新[4] YIN Yao-bao;YU Zhan-xiang;LI Wen-ding;LIN Deng;GUO Chuan-xin(School of Mechanical Engineering,Tongji University,Shanghai 200092;Shanghai Institute of Spaceflight Control Technology,Shanghai 201109;Zhejiang Yong'an Construction Machinery Co.,Ltd.,Wenzhou,Zhejiang 325204;Beijing Institute of Construction Mechanization,Beijing 100007)

机构地区：[1]同济大学机械与能源工程学院,上海200092 [2]上海航天控制技术研究所,上海201109 [3]浙江永安工程机械有限公司,浙江温州325204 [4]北京建筑机械化研究院,北京100007

出　　处：《液压与气动》2021年第6期50-55,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51775383);上海航天科技创新基金(SAST2017093)。

摘　　要：双作用气动液压锤利用锤芯重力和活塞顶部的氮气压力共同作用,实现锤的快速打击并使桩贯入土层。基于冲击动力学原理和波动理论,分析沉桩施工过程中从锤与桩的撞击,直至桩贯入土层的全过程,建立了沉桩系统各部件间的相互作用关系模型,并通过拉氏变换推导出了打桩过程中锤击力的解析解。从理论方面对实际施工过程中“重锤轻击”的合理性进行了验证,最后针对两种土体介质模型分别建立了锤-桩-土系统动力学方程。The double-acting pneumatic hydraulic hammer uses the gravity of the ram and the nitrogen pressure at the top of the piston to achieve a quick strike to the pile and penetrate the pile into the soil.Based on the principles of impact dynamics and wave theory,the whole process from the impact of the hammer to the pile until the pile penetrates into the soil during the construction of the pile is analyzed,and the interaction model between the components of the pile driving system is established.The analytical solution of the hammering force during the pile driving process was derived by using Laplace transform method.From the theoretical aspect,the rationality of the“heavy hammer and light blow”in the actual construction process was verified.Finally,the dynamic equations of the hammer-pile-soil system were established for the two soil medium models.

关 键 词：气动液压锤 桩 动力学模型 应力波 

分 类 号：TH137[机械工程—机械制造及自动化] TH138