新型多柱桁架式Spar平台疲劳寿命分析

利用谱分析方法对新型多柱桁架式Spar平台的关键点进行了疲劳寿命分析计算.首先建立平台的有限元计算模型,并在频域内进行动力分析;然后利用热点应力法求出关键点应力传递函数,根据应力传递函数得到每个短期海况的应力谱和应力谱参数;最后采用Miner线性累积损伤准则计算出关键点的疲劳寿命,计算结果表明关键点疲劳寿命符合规范要求.     

海洋工程风险接受准则研究进展

简要介绍了海洋工程风险接受准则研究的重要意义及其确定原则，分析了海洋工程中个人、社会及环境风险接受准则的研究及其应用现状，指出目前海洋工程风险接受准则研究要解决的问题和今后的研究方向。     

基于风险的海洋结构物无损检测功能的分级

提出了基于风险的海洋结构物无损检测功能分级方法,采用检测概率、错误识别概率和裂纹出现概率度量检测功能,并修正了错误识别概率的取值范围。根据风险值对无损检测功能进行了分级,研究了风险值随检测概率、错误识别概率和裂纹出现概率的变化规律,分析了风险值对检测费用、维修费用及失效费用的敏感性。在此基础上,将基于风险的海洋结构物无损检测功能分级方法应用于优化检测策略,用算例证明了文中所提方法的有效性。     

海洋工程人因可靠性研究进展

海洋结构物在其生命周期的设计、建筑和工作等阶段中发生的灾害性事故（船舶和海洋平台的碰撞、搁浅、腐蚀病劳破坏、沉船、火灾、爆炸等）大多与人为错误和组织错误（ＨＯＥ有关,据统计,大约６０％～９０％的事故意 由ＨＯＥ引起,因此海洋工程中进行人因可靠性分析研究很有必要,在全面回顾近年来各国在这一领域的研究现状,分析和总结人因可靠性评估（ＨＲＡ）研究方法的基础上,重点介绍了失效模式及影响分析（ＦＭＥＡ）,事     

Cost-Benefit Assessment of Inspection and Repair Planning for Ship Structures Considering Corrosion Model Uncertainty

Owing to high costs and unnecessary inspections necessitated by the traditional inspection planning for ship structures, the risk-based inspection and repair planning should be investigated for the most cost-effective inspection. This paper aims to propose a cost-benefit assessment model of risk-based inspection and repair planning for ship structures subjected to corrosion deterioration. Then, the benefit-cost ratio is taken to be an index for the selection of the optimal inspection and repair strategy. The planning problem is formulated as an optimization problem where the benefit-cost ratio for the expected lifetime is maximized with a constraint on the minimum acceptalbe reliability index. To account for the effect of corrosion model uncertainty on the cost-benefit assessment, two corrosion models, namgly, Paik＇ s model and Guedes Soares＇ model, are adopted for analysis. A numerical example is presented to illustrate the proposed method. Sensitivity studies are also providet. The results indicate that the proposed method of risk-based cost-benefit analysis can effectively integrate the economy with reliability of the inspection and repair planning. A balance can be achieved between the risk cost and total expected inspection and repair costs with the proposed method, which is very. effective in selecting the optimal inspection and repair strategy. It is pointed out that the corrosion model uncertainty and parametric uncertaintg have a significant impact on the cost-benefit assessment of inspection and repair planning.     

人因综合安全评估(FSA)方法在海洋结构物事故中的应用研究

将人作为系统的一个部分研究其对系统安全性产生的影响,是风险评估中不可回避的问题.本文把人为因素作为海洋结构物事故中一个分系统,利用综合评估的方法对其进行研究,系统分析了海洋结构物事故中人为失误的各种原因,并提出了人为因素综合安全评估中有待解决和值得关注的问题.     

船体结构腐蚀检测规划的成本及效益分析

建立了基于风险的船体结构腐蚀优化检测规划的成本-效益分析模型。以费效比作为选择最优检测策略的标准,最优的检测策略是在保证结构设计工作寿命期内的可靠指标大于最低可靠指标的基础上,使得结构生命周期内总的费效比最大。在此基础上,以受点腐蚀损伤的船体构件为例,对其检测策略进行了成本-效益评估,并对计算结果进行了敏感性分析。结果表明,基于风险的成本及效益分析方法可以将检测规划的经济性和可靠性有效地结合起来,能够在风险与成本之间达到一种平衡,它在优化检测策略时是有效的。     

Time-Variant Reliability Analysis of FPSO Hull Girder Considering Corrosion Based on Statistics

FPSO is a kind of important exploitation platform used in ocean oil and gas industry, which has the unique character of mooring at outsea for a long time. Since it can not be inspected and maintained thoroughly at dock like other kinds of ships, the reliability of FPSO hull girder during the whole service should be focused. Based on latest corrosion database and rational corrosion model, the ultimate strength of one FPSO is calculated under the conditions of slight, moderate and severe corrosion. The results not only provide the reliability under different corrosion conditions, but also do well for further inspection and maintenance research. The results provide necessary foundation for deciding inspection intervals and maintenance measures, which has practical sense to improve the general safety level of ocean engineering.