桶形基础平台沉浮过程稳性分析

对桶形基础平台下沉上浮过程的稳定性进行了理论分析;给出了模型试验和仿真结果．实验和分析结果表明,平台在下沉和上浮过程中的稳定性主要与吃水深度、平台的结构参数以及入水角等因素有关．在一定范围内,稳性与平台的摆动倾角关系不大．随着吃水深度的增加,平台的稳心高变大,但平台入水角减小,所以平台的容许摆动幅度降低．鉴于此,平台的沉浮稳性要综合各因素进行评价．

Lowering and raising stability of bucket foundation platform

The bucket foundation platform is a new-style platform used in offshore oil exploitation. The stability is one of the most important issues for the platform. Lowering and raising stability is analyzed theoretically. Furthermore, the results of model test and simulation are provided. Experiments and analysis results show that lowering and raising stability mainly rests with the platform underwater depth, structural characteristics, water entry angle, etc., and has scarcely any connection with the platform angles, to certain extent. As underwater depth increases, metacenter height increases, but water entry angle decreases, so the platforms allowable swing angles also decrease. In view of the above, the lowering and raising stability of the bucket foundation platform should be evaluated synthetically.