摘要
基于一套三桩腿自升式平台"踩脚印"试验系统,通过设置典型工况条件,测量平台桩腿上的弯矩、水平力和平台整体的倾斜角度,研究偏心距、脚印尺寸和单、双坑因素的影响规律。结果表明,桩靴周围土体不对称是引起踩坑桩腿底部弯矩的主要原因;桩腿上的最大载荷和平台整体的倾斜角度随着偏心距的增大而减小,随着脚印尺寸的增大而增大;非踩坑桩腿顶部是整个平台受力最大、最易损坏的位置,对深刻认识"踩脚印"问题和指导实际作业具有重要意义。
Based on a three-legged jack-up unit model test system,the influence rules of offset distance,footprint size,single and double footprints are investigated by setting typical working conditions.The bending moment,horizontal force and angle of slope are measured and recorded.The results show that the non-uniform soil condition under the spudcan mainly causes the large bending moment at the bottom of the leg.The maximum loads of the leg and the slope angle of the platform decrease with the increase of offset distance,while increase with the size of the footprint.The maximum stress happens at the top of the away-footprint leg,and is prone to damage.The conclusions are of great significance to better understand the problem and guide the field operations.
作者
杜长江
白兴兰
袁烨
DU Changjiang;BAI Xinglan;YUAN Ye(School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,Zhejiang,China;Department ofAeronautics and Astronautics,Fudan University,Shanghai 200433,China)
出处
《船舶工程》
CSCD
北大核心
2021年第7期136-142,共7页
Ship Engineering
基金
国家自然科学基金项目(面上项目51879238)
浙江省自然科学基金联合基金重点项目(LHZ21E090003)。
