本文依据CMA方法建立海浪波高与周期的联合模型，根据IFORM方法确定北大西洋百年一遇波高-周期的等概率曲线，设计了一组百年一遇波浪海况。由于海洋平台经受的波浪波长有几米到几百米，而半潜平台浮箱一般长度在100 m左右，宽度和高度在10～20 m范围，浮箱的粘性阻尼是否要考虑，如何考虑目前工程界做法不一。本文以典型四立柱半潜式平台为研究对象，运用忽略浮箱粘性阻尼、用Morison方程来考虑粘性阻尼和增加临界阻尼来修正的3种方法，分别对半潜式平台的运动响应、气隙、波浪二阶平均漂移力分别进行短期预报分析研究，并对3种分析方法结果进行对比分析。
In this paper, a joint model of wave height and period was established based on the CMA method. The equal probability curve of wave height and period for once-in-a-century wave in the North Atlantic was determined based on the IFORM method. And a set of wave with once-in-a-century sea conditions was designed. Since the wavelength experienced by the offshore platform ranges from several meters to several hundred meters. The semi-submersible platform buoyancy tank generally has a length of about 100 m, and its width and height are in the range of 10~20 m.Whether the viscous damping of the buoyancy tank should be considered and how to consider it are different in the engineering field at present. In this paper, a typical four-column semi-submersible platform is taken as the research object. The short-term prediction of the motion response, air gap and wave second-order average drift force of the semi-submersible platform are studied by using three methods: ignoring the viscous damping of the pontoon, considering the viscous damping with Morison equation and increasing the critical damping. The results of the three methods are compared and analyzed.
2022,44(12): 88-94 收稿日期：2021-06-25
DOI：10.3404/j.issn.1672-7649.2022.12.017
分类号：P75
基金项目：国家自然科学基金资助项目（52071161）
作者简介：霍发力(1982 ? )，男，副教授，主要从事船舶与海洋结构物结构设计及水动力性能研究
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