摘要
在打桩作业中,机械冲击系统会产生周期性冲击载荷,每一次冲击均产生较大应力,冲击动力特性的研究显得尤为重要。本研究基于ANSYS LS-DYNA软件,建立了打桩锤冲击系统的有限元模型,研究了不同冲击能量下对砧座应力、桩端位移和冲击力大小的影响;研究结果表明:砧座应力集中于上接触面及其圆角处,最大应力达到360.361MPa,能量传递效率为91.86%;最大冲击力和应力与锤芯速度呈线性关系。本研究结果对冲击系统结构设计优化具有重要的指导意义。
In piling operation,the mechanical impact system generates periodic impact loads,and each impact generates large stresses,and the study of impact dynamic characteristics is particularly important.Based on ANSYS LS-DYNA software,this study establishes a finite element model of the impact system of pile hammer,and analyses the effects on anvil stress,pile end displacement and impact force magnitude under different impact energies;the results show that:the anvil stress is concentrated in the upper contact surface and its rounded corners,and the maximal stress reaches 360.361 MPa,and the energy transfer efficiency is 91.86%.The maximum impact force and stress are linearly related to the hammer core speed.The results of this study have important guiding significance for optimising the design of mechanical impact system.
作者
王腾
张加翔
于文太
张欣
刘顺庆
张晓馨
张长龙
Wang Teng;Zhang Jiaxiang;Yu Wentai;Zhang Xin;Liu Shunqing;Zhang Xiaoxin;Zhang Changlong(National Engineering Research Center for Marine Geophysical Prospecting and Exploration and Development Equipment,China University of Petroleum(East China),Shandong,266580;School of Mechanical and Electrical Engineering,Qingdao University of Science and Technology,Shandong,266061;Installation Division of Off shore Petroleum Engineering Co.,Ltd.,Tianjin,300450;Qingdao Gaoce Technology Co.,Ltd.,Shandong,266114;China Forging Machinery Co.,Ltd.,Jiangsu,226600)
出处
《当代化工研究》
CAS
2023年第23期48-50,共3页
Modern Chemical Research
基金
工业和信息化部科研项目专项经费资助(项目编号:CH02N20)。