NorMoor JIP, Mooring Design Code Calibration

系泊 可靠性(半导体) 校准 可靠性工程 海洋工程 航程(航空) 计算机科学 工程类 海试 统计 数学 量子力学 物理 航空航天工程 功率(物理)
作者
Torfinn Hørte,Siril Okkenhaug,Øivind Paulshus
标识
DOI:10.4043/27773-ms
摘要

DNV GL is currently running a Joint Industry Project, "NorMoor JIP," with participants from oil companies, engineering companies, rig-owners, manufacturers and marine authorities. It is a global study covering Northern Europe, Gulf of Mexico and Brazil waters. Our motivation for initiating a study on mooring line reliability was that all the global standards (API, ISO, DNV, others) are mostly based on work from late 1990s, when frequency domain analysis was prevalent. The reliability level implied by these regulations is not known, and we also see that the mooring standards are interpreted and applied differently. Thus, there is a need for a mooring design code with a consistent analysis methodology and with safety factors for time domain analysis that are in line with this methodology and calibrated at an appropriate target reliability level. This is achieved through reliability-based calibration for a range of different units, mooring systems, water depths and geographical locations. The focus in the present paper is the calibration of safety factors and selection of target reliability level. The underlying structural reliability analysis results used for the calibration are reported in an accompanying paper at OTC 2017. Structural reliability analysis has been applied to calculate the probability of mooring line failure for intact mooring systems (ULS) and damaged mooring systems where one line is removed (ALS). These results are used as input to the calibration process where the optimum safety factor is calculated as a function of target probability of failure. For ALS, empirical failure data are utilized to assess the probability that a line is missing. Calibration for different design formats are carried out. The current format using a single safety factor is challenged with a format with two safety factors. The calibration is carried out to avoid significant under design and excessive over design. The target reliability level is determined based on evaluations of the current mooring design practice. Final recommendations on safety factors and accompanying analysis methodology are presented. Due to the nature of the hurricanes, it is shown and discussed that a different design philosophy is needed for the Gulf of Mexico. The present work provides a unique and comprehensive set of results, where advanced reliability methods are used to calibrate a mooring design code where the mooring line tensions are calculated in the time domain. The results provide a basis for regulators, such as ISO, to update their rules. ULS and ALS are covered here, and a potential phase 3 of the JIP will cover the fatigue limit state.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Jay_Gavin应助白白采纳,获得10
1秒前
zy发布了新的文献求助10
2秒前
Liang发布了新的文献求助10
2秒前
美丽的楼房完成签到 ,获得积分10
4秒前
4秒前
大观天下完成签到,获得积分10
5秒前
端庄的冬天完成签到,获得积分10
5秒前
所所应助yizhe采纳,获得10
5秒前
高大的静曼完成签到,获得积分10
6秒前
JK完成签到,获得积分10
7秒前
景行行止完成签到,获得积分10
7秒前
草原狼完成签到,获得积分10
7秒前
7秒前
gexiaoyang完成签到 ,获得积分10
8秒前
量子星尘发布了新的文献求助10
9秒前
小二郎应助自信的孱采纳,获得10
9秒前
小马甲应助小王采纳,获得10
10秒前
伶俐的秋白完成签到,获得积分10
10秒前
10秒前
思源应助维生素采纳,获得10
11秒前
11秒前
完美梨愁发布了新的文献求助10
14秒前
14秒前
15秒前
英俊的铭应助白兰鸽采纳,获得10
17秒前
布洛小芬完成签到 ,获得积分20
18秒前
whatever应助shark采纳,获得20
18秒前
默默雪旋完成签到 ,获得积分10
18秒前
牧紫菱完成签到,获得积分10
19秒前
20秒前
21秒前
小王发布了新的文献求助10
21秒前
21秒前
Eric完成签到,获得积分10
22秒前
开朗的山彤完成签到,获得积分10
22秒前
维生素完成签到,获得积分10
22秒前
时林完成签到,获得积分10
22秒前
傻瓜完成签到 ,获得积分10
23秒前
24秒前
大观天下发布了新的文献求助10
26秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038388
求助须知:如何正确求助?哪些是违规求助? 3576106
关于积分的说明 11374447
捐赠科研通 3305798
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029