摘要
针对某陆上风电场2 MW风电塔结构,建立了“地基土-风机基础”有限元与无限单元结合的半无限边界模型,研究土-结构相互作用下,风机基础上部荷载、回填土重度、基础重度对地基的作用以及地基形变对风机基础的反向作用等。通过ABAQUS中的生死单元模拟风机基础从基坑开挖、吊装基础、基坑回填到风机运行的全过程,分析风机在运行过程中正常工况和极端工况下的基础环水平度、混凝土基础的沉降与倾斜及其应力情况,并与底部刚性连接的基础进行对比。研究表明,地基土对风机基础环水平度影响较大,基础应力方面变化也较为明显。
A semi-infinite boundary model combining finite element and infinite element was established for a 2MW wind turbine tower structure in an onshore wind farm.Under the condition of soil-structure interaction,the upper load of fan foundation is studied.Backfill soil weight;The effect of foundation weight on foundation and the reverse effect of foundation deformation on fan foundation.Through ABAQUS life-and-death unit simulation fan foundation from the foundation pit excavation;Lifting foundation;Foundation pit backfilling;And the whole process of fan operation.The levelness of foundation ring in normal and extreme working conditions is analyzed.The settlement and inclination of the concrete foundation and its stress are compared with the foundation with rigid connection at the bottom.The research shows that the foundation soil has great influence on the levelness of fan foundation ring,and the foundation stress is also obvious.
作者
陈龚
刘哲锋
伍军
向康
楚加翼
CHEN Gong;LIU Zhefeng;WU Jun;XIANG Kang;CHU Jiayi(School of Civil Engineering,Changsha University of Science&Technology,Changsha Hunan 410004)
出处
《河南科技》
2021年第35期31-35,共5页
Henan Science and Technology
关键词
地基土
风机基础
水平度
应力
foundation soil
fan foundation
levelness
stress
