渤海单立柱桶型基础平台冰振分析

摘要

The bucket foundation platform is a new foundation pattern in ocean engineering. Until now, the most research is focus on failure analysis and reaction force of the bucket foundation,but the structural ice-resistant performances are not well developed. In this paper, combined with the field monitored data of some bucket foundation platforms in Bohai Bay, ice-induced vibrations are analyzed. The results show that even though these structures may effectively resist extreme static ice forces,the ice-induced acceleration is more significant than the jacket platforms.Then spectral-based method is provided to analyze the fatigue life of a real bucket foundation platform, according to the results, the fatigue life of the key joint can meet the requirement. Finally, the ice-resistant strategy is presented, which provides a basis for the design of these platforms in ice zone.%桶形基础平台是一种新型的海洋结构,由于目前对该结构的研究集中在桶基失效及承载力方面,其抗冰振性能还很模糊.文章基于对渤海单立柱式桶基平台的多年现场监测,发现其冰振加速度响应显著,明显高于导管架平台结构.利用谱分析方法对一实际桶基平台进行了冰振疲劳寿命分析,计算结果表明,关键点疲劳寿命符合规范要求.最后,提出此类结构冰振抑制策略,为其结构抗冰设计提供依据.