基于模型试验的八桩腿导管架平台冰力掩蔽效应研究  

Study on Sheltering Effect of Eight-leg Jacket Platform on Ice Force Based on Model Test

作　　者：李伟 高扬 孙诗语 王晓蕾 朱本瑞[2] 黄焱[2] LI Wei;GAO Yang;SUN Shiyu;WANG Xiaolei;ZHU Benrui;HUANG Yan(CNOOC Research Institute Ltd.,Beijing 100010,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中海油研究总院有限责任公司,北京100010 [2]天津大学建筑工程学院,天津300350

出　　处：《中国造船》2024年第5期37-52,共16页Shipbuilding of China

基　　金：中国海洋石油有限公司科技项目(KJZH-2023-2402)。

摘　　要：针对渤海海域八腿直桩导管架中心平台,进行了一系列静冰载荷模型试验,以探究冰力掩蔽效应。根据该海域海冰条件确定模型冰厚度和强度等参数;进行了单桩速度扫掠试验,以确定与桩腿极限静冰载荷对应的冰速。开展了不同冰攻角下的静冰载荷模型试验,得到桩腿冰载荷时程变化曲线。基于观察到的试验现象,对不同冰攻角下的掩蔽效应进行分析;提出了一种掩蔽效应表征方法,并与规范给出的计算方法作比较。结果表明,基于掩蔽效应计算方法得到的平台总冰力小于规范计算值,且比试验结果保守,可为八桩腿导管架整体冰载荷的合理评估提供参考。Through a series of static ice load model tests the sheltering effect of a vertical eight-legged jacket platform on ice force in the Bohai Sea is investigated.The thickness and strength of scaled ice were determined according to ice conditions in the target sea area,and the velocity sweep test was carried out to determine the ice velocity in the event of extreme static ice load on the leg of the jacket platform.Then,the static ice load model tests were carried out on the platform under different ice attack angles,and time-history curves of ice loads on each leg were obtained.Based on the observed experimental phenomena,the masking effect at different ice angles of attack was analyzed.A method for characterizing the masking effect is proposed and compared with the corresponding calculation by the specification.The results show that the total ice force calculated using the proposed method is less than the value calculated according to the standard,and is conservative to the test results.This study provides a reference for accurately and rationally evaluating the total ice load of the eight-legged jacket platform.

关 键 词：导管架平台 静冰载荷 模型试验 掩蔽效应 

分 类 号：TE951[石油与天然气工程—石油机械设备]