半潜式平台四立柱波浪爬升及气隙试验

采用模型试验方法对半潜式平台近场干涉、波浪爬升和气隙分布等关键问题进行较为系统的研究。在海洋工程水动力学试验规程的指导下完成系泊模式下半潜式平台水池模型试验。通过布设光学非接触式六自由度传感器、电阻式钽丝、力传感器、浪高仪等测量设备,获取平台瞬态运动响应、立柱壁面波浪爬升、内场气隙分布等测量参数,系统地分析不同波陡参数、散射参数对平台气隙的影响。结果表明：波陡参数对内场气隙分布影响较大,当波陡参数取0.12~0.15时,平台运动幅值较大,平台边缘的气隙较小;由于波浪爬升效应,立柱附近气隙小于内场。研究结论对平台设计和安全运营具有一定的指导作用。

Test on Four-Column Wave Climbing and Air Gap of Semi-submersible Platform

The key problems of the near-field interference, wave climb and air gap distribution of a semi-submersible platform are systematically studied by model test method. Under the guidance of the marine engineering hydrodynamic test regulations, the tank model test of the semi-submersible platform in the mooring mode is conducted. Through the deployment of the optical non-contact six degree-of-freedom sensor, resistance type tantalum wire, force sensor, wave height meter and other measuring equipment, the transient motion response of the platform, the wave run-up of the column wall and the air gap distribution in the internal field are obtained. The effects of different wave steepness parameters and scattering parameters on the air gap response characteristics of the platform are analyzed systematically. The results show that: the wave steepness is of great influence on the air gap distribution in the inner field, when the wave steepness parameter is from 0.12 to 0.15, the amplitude of the platform motion is large and the air gap at the platform edge is small; due to the wave climbing effect of the column, the air gap near the column is smaller than that in the inner field. The research conclusions can serve as a guidance for the design and safe operation of the platform.