摘要
浮筒辅助大型导管架结构整体拆除作业是一个连续过程,作业过程中拆除系统的动力荷载及动力参数均会发生显著变化,传统基于某一稳定状态的结构动力响应分析方法不能准确预测拆除系统上浮过程中的动力响应。通过建立浮筒辅助大型导管架结构整体拆除上浮过程动态分析模型,对拆除系统上浮过程的动力响应特性进行研究。结果表明,整体拆除动态分析模型可以准确描述拆除系统上浮过程中浮筒及导管架浮力变化对上浮高度的影响机制,拆除系统上浮高度约为不考虑浮筒和导管架浮力变化时的90%。此外,浮筒辅助大型导管架整体拆除方法的动态稳定性较强,四级海况下拆除系统的最大偏移量仅为4.2 m,有较好的工程应用前景。
The pontoon-assisted jacket platform removal is a continuous process,and the dynamic load and the dynamic characteristics of the removal system therefore change significantly in the de-ballasting process of pontoons.The conventional method based on a specific stable state cannot predict the dynamic response of the removal system accurately.The time-varying mass point is adopted to characterize the de-ballasting process of the pontoons,and a numerical model of the pontoon-assisted large-scaled jacket platform removal is established,and the dynamic response characteristics of the removal system are investigated with the numerical model.The results show that the numerical model can describe the influence of the pontoon and jacket platform's buoyancy change on the floating height of the removal system,and the floating height of the removal system is about 90%compared with that when the buoyancy change of the buoy and jacket is not considered.In addition,the maximum offset of the removal system under the four-class sea conditions is just 4.2 m,and this indicates that the pontoon-assisted large-scaled jacket platform removal method has good environmental adaptability,which has excellent engineering application prospects.
作者
吕泽宇
车巨鹏
王树青
宋宪仓
LYU Zeyu;CHE Jupeng;WANG Shuqing;SONG Xiancang(College of Engineering,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Ocean Engineering,Ocean University of China,Qingdao 266100,China)
出处
《海洋工程》
CSCD
北大核心
2023年第3期37-47,共11页
The Ocean Engineering
基金
国家自然科学基金资助项目(52088102,51879249)
山东省重点研发计划(重大科技创新工程)资助项目(2021CXGC010701)
山东省自然科学基金资助项目(ZR2021QE101)。
关键词
大型导管架结构
浮筒辅助拆除
连续上浮过程
动力响应特征
结构受力特性
large-scaled jacket platform
pontoon assisted removal
continuous floating process
dynamic response characteristics
mechanical properties of structure
