自升式海洋平台拖航阻力计算分析

doi:10.16183/j.cnki.jsjtu.2023.S1.03

摘要/Abstract

摘要：

在海洋平台拖航过程中,提前准确计算平台拖航阻力,选配动力合适的主拖轮,对拖航安全有着十分重要的意义.调研了各主流船级社拖航阻力的计算公式或推荐方法,以胜利石油工程公司典型自升式海洋平台为研究对象,进行了CFD/AQWA有限元数模计算,根据结果的对比分析,优选了适合国内海域平台拖航阻力的计算模型,并提出了适合的拖船选用安全系数.

关键词: 拖航阻力, 计算模型, 有限元, 海洋平台

Abstract:

In the course of towing of offshore platform, it is of great significance to calculate the towing resistance ahead of time and select the main tugboat with proper power for towing safety. In this paper, the calculation formulas or recommended methods for towing resistance of mainstream classification societies were investigated, and a CFD/AQWA finite element numerical simulation was conducted for the typical jack-up offshore platform in Shengli Petroleum Engineering Company.Based on the comparative analysis of the results, a suitable model for the calculation of towing resistance of platforms in domestic waters was optimized, and a suitable towing factor of safety was proposed.

Key words: towing resistance, calculation model, finite element, offshore platform

中图分类号:

U674.38

安涛, 林增勇, 柏健. 自升式海洋平台拖航阻力计算分析[J]. 上海交通大学学报, 2023, 57(S1): 108-113.

AN Tao, LIN Zengyong, BAI Jian. Calculation of Towing Resistance of Jack-up Offshore Platform[J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 108-113.

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参考文献 4

[1]	张海燕. 海上移动平台和FPSO拖航阻力分析[J]. 中国海洋平台, 2015, 30 (5): 74-79.
	ZHANG Haiyan. Towing resistance analysis of mobile offshore units and FPSO[J]. China Ocean Platforms, 2015, 30(5): 74-79.
[2]	中国船级社. 海上拖航指南(2011)[S]. 北京: 2011, 附录2: 34-35.
	China Classification Society. Guidelines for towage at sea[S]. Beijing: 2011, Appendix 2: 34-35.
[3]	冯旭, 冯士伦, 向嘉隽, 等. FX自升式平台拖航稳性研究[J]. 船舶工程, 2017, 39(6): 73-76.
	FENG Xu, FENG Shilun, XIANG Jiajun, et al. Research on towing stability of FX jack-up platform[J]. Ship Engineering, 2017, 39(6): 73-76.
[4]	曹树杰, 李红涛. 海上移动平台的拖航阻力[J]. 中国船检, 2013(6): 84-86.
	CAO Shujie, LI Hongtao. Towing Resistance of Mobile Platform at Sea[J]. China Ship Inspection, 2013(6): 84-86.

环境条件	CCS	DNV	IMO	GL	ABS
风速/(m·s^-1)	20	20	20	20	-
流速/(m·s^-1)	0.5	1.0	0.5	≥0.5	-
有义波高/(m·s^-1)	5	5	5	5	-
波浪周期/s	-	6~9	-	-	-

拖速/kn	静水阻力/kN	考虑风阻力/kN	拖航阻力/kN
1	13	1069	1069
2	45	1089	1089
3	99	1122	1122
4	183	1173	1173
5	306	1247	1247
6	482	1355	1355

拖速/ kn	拖航阻力/kN
拖速/ kn	波高1 m	波高2 m	波高3 m	波高4 m	波高5 m
1	1076.9	1086.2	1101.8	1123.6	1151.7
2	1112.3	1131.0	1162.2	1205.9	1262.0
3	1169.9	1197.9	1244.7	1310.2	1394.4
4	1256.3	1293.7	1356.1	1443.4	1555.6
5	1382.0	1428.8	1506.7	1615.9	1756.2
6	1562.1	1618.3	1711.8	1842.8	2011.2

拖速/kn	拖航阻力/kN
1	1405
2	1609
3	1908
4	2302
5	2791
6	3375

参数	数值
船长,L/m	74.09
船宽,B/m	62.78
型深,D/m	7.92
拖航吃水,d/m	5.18
方形系数,δ	0.65
船舶或水上建筑物的水下湿表面积,A₁/m²	3676
浸水部分的船中横剖面积,A₂/m²	325.2
形状系数∑C_s×受风面积A_i(按顶风计算)/m²	1×172.01+1×593.4+0.5×5060+1.25×445.6+1.5×120+1×68=4100其中受风面积中井架满实系数按0.6,桩腿按等效面积)