超大型浮体波浪中的完整稳性研究

摘要

Admittedly, very large floating structures have huge size with coterminous modules and more than one kilometer in longitudinal direction, whose intact stability is different from any other normal ships and offshore platforms. In this paper, very large floating structures are connected with several modules in case of rigid. Based on the intact stability in calm water, vertical moments are analyzed from wave factors including lengths, heights (the ratio of height to length), directions and locations of the chest. Finally, research on intact stability is briefly reviewed. Due to rigid connected modules, very large floating structures have the same displacement and rotation as the unit module, and also have the same metacentric and large angle stability. However, with increasing the numbers of modules, maximum vertical moments are accordingly rising with wave factors as length, heights (the ratio of height to length), directions and the locations of the chest, and the metacentric and large angle stability are also differ from the static stability.%海洋超大型浮体通过多模块前后相连达数千米长，其完整稳性不同于常规的船舶与海洋平台结构物。论文假设超大型浮体为多模块刚性连接，在静水完整稳性分析的基础上，考虑波长、波高（波陡）、浪向、波峰波谷位置等波浪要素对其垂向弯矩的影响，计算结果表明：超大型浮体多个模块由于之间的刚性连接约束了相对位移和转角并且横向特性完全相同，其初稳性、大倾角稳性与单模块的特性一致；而通过变化波长、波高（波陡）、浪向、波峰波谷位置等波浪要素，求得的最大垂向弯矩随着模块数量的增加而有不同程度的增加，波浪中的初稳性、大倾角稳性较静水中亦有所不同。