“番禺30-1”导管架平台风险评估
发布时间：2019-03-05 09:48
【摘要】：“番禺30-1”导管架平台位于南海海域,所处海洋环境极为恶劣。加之该平台体积庞大,结构复杂,杆件和管结点数目众多,所以对其进行风险评估对于平台的安全服役意义重大。首先,本文对“番禺30-1”导管架平台进行极端海洋环境下的静力分析。通过Weibull分布拟合得到了南海百年一遇设计波要素,并与百年一遇风、流组合作为分析环境,对平台和桩腿进行静力分析。根据分析结果,本文对上部组块以及桩腿的应力和位移进行了分析,并使用SESAM软件的规范校核方法对导管架杆件和管节点进行规范校核,从而对平台在极端海况下的安全状态进行全面地评估。研究表明平台甲板、桩腿和导管架在极端海况下的力学性能均满足安全要求。然后,本文使用ANSYS软件的瞬态分析方法,对“番禺30-1”导管架平台进行了极端海况下的动态特性分析。首先进行自振特性分析,得到结构的自振周期不会与波浪周期发生共振。在此基础上进行瞬态分析,得到了单元的应力、位移时程曲线,以此对平台在极端海况下的动态特性进行安全评估。其次,本文对“番禺30-1”导管架平台进行了随机波环境下的疲劳损伤分析。瞬态分析得到9个代表点的应力时程曲线后,利用有限元方法反推求得各个代表点的应力集中系数,进而得到热点应力时程曲线,并使用雨流统计法进行应力幅值统计。选用DNV规范推荐的T型S-N曲线,按照Miner线性累计理论,计算9个代表点的年疲劳损伤量,对平台在作业工况下的疲劳寿命进行评估。研究表明9个代表点的疲劳寿命均满足要求。再次,本文就平台的腐蚀疲劳、海生物附着问题进行定量分析和评估,通过分析发现腐蚀会加剧结构疲劳,海生物附着则会增大结构受力。根据这一结论,本文提出了相应的解决措施,并给出了进行海生物清理的附着厚度最大值。最后,本文对船舶靠泊时平台的受力情况进行计算分析,从正向靠泊和侧向靠泊两方面进行分析和研究,结果表明侧向靠泊比正向靠泊更偏于安全;从平台强度和设备安全方面分析,对船舶侧向靠泊时最大法向靠泊速度和无护舷情况下船舶靠泊最大法向靠泊速度给出了建议值,对安全的船舶靠泊提供指导。
[Abstract]:Panyu 30-1 jacket platform is located in the South China Sea, where the marine environment is extremely harsh. In addition, the platform is huge in volume, complex in structure, and has a large number of member and pipe nodes, so risk assessment is of great significance for the safe service of the platform. Firstly, the static analysis of "Panyu 30-1" jacket platform under extreme marine environment is carried out in this paper. The design wave elements of once-in-a-hundred years in the South China Sea are obtained by Weibull distribution fitting, and the static analysis of the platform and pile leg is carried out with the combination of wind and flow as the analysis environment. According to the analysis results, the stress and displacement of upper block and pile leg are analyzed in this paper, and the standard check method of SESAM software is used to check the jacket member and pipe joint. Thus, the safety status of the platform under extreme sea conditions is comprehensively evaluated. The results show that the mechanical properties of platform deck, pile legs and jackets meet the safety requirements under extreme sea conditions. Then, using the transient analysis method of ANSYS software, the dynamic characteristics of "Panyu 30-1" jacket platform under extreme sea conditions are analyzed. First, the natural vibration characteristics of the structure are analyzed and the results show that the natural period of the structure will not resonate with the wave period. Based on the transient analysis, the stress and displacement time-history curves of the element are obtained, which can be used to evaluate the dynamic characteristics of the platform under extreme sea conditions. Secondly, the fatigue damage analysis of "Panyu 30-1" jacket platform under random wave environment is carried out in this paper. After the stress time history curves of nine representative points are obtained by transient analysis, the stress concentration coefficients of each representative point are obtained by using the finite element method, and then the hot spot stress time history curves are obtained, and the stress amplitude statistics are carried out by using the rain flow statistics method. According to Miner's linear accumulative theory, the annual fatigue damage of nine representative points is calculated according to the T-type S _ (N) curve recommended by DNV Code, and the fatigue life of the platform under working conditions is evaluated. The results show that the fatigue life of 9 representative points meets the requirements. Thirdly, the corrosion fatigue and marine adhesion of the platform are quantitatively analyzed and evaluated. It is found that the corrosion will aggravate the structural fatigue, and the marine adhesion will increase the stress of the structure. Based on this conclusion, this paper puts forward the corresponding solutions and gives the maximum value of attachment thickness for marine biological clean-up. Finally, the force of the platform when the ship is berthing is calculated and analyzed in two aspects: forward berthing and lateral berthing. The results show that lateral berthing is safer than forward berthing. Based on the analysis of platform strength and equipment safety, the maximum normal berthing speed in lateral berthing and the maximum normal mooring speed in the absence of fenders are proposed, which can provide guidance for safe berthing.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95
本文编号：2434776
[Abstract]:Panyu 30-1 jacket platform is located in the South China Sea, where the marine environment is extremely harsh. In addition, the platform is huge in volume, complex in structure, and has a large number of member and pipe nodes, so risk assessment is of great significance for the safe service of the platform. Firstly, the static analysis of "Panyu 30-1" jacket platform under extreme marine environment is carried out in this paper. The design wave elements of once-in-a-hundred years in the South China Sea are obtained by Weibull distribution fitting, and the static analysis of the platform and pile leg is carried out with the combination of wind and flow as the analysis environment. According to the analysis results, the stress and displacement of upper block and pile leg are analyzed in this paper, and the standard check method of SESAM software is used to check the jacket member and pipe joint. Thus, the safety status of the platform under extreme sea conditions is comprehensively evaluated. The results show that the mechanical properties of platform deck, pile legs and jackets meet the safety requirements under extreme sea conditions. Then, using the transient analysis method of ANSYS software, the dynamic characteristics of "Panyu 30-1" jacket platform under extreme sea conditions are analyzed. First, the natural vibration characteristics of the structure are analyzed and the results show that the natural period of the structure will not resonate with the wave period. Based on the transient analysis, the stress and displacement time-history curves of the element are obtained, which can be used to evaluate the dynamic characteristics of the platform under extreme sea conditions. Secondly, the fatigue damage analysis of "Panyu 30-1" jacket platform under random wave environment is carried out in this paper. After the stress time history curves of nine representative points are obtained by transient analysis, the stress concentration coefficients of each representative point are obtained by using the finite element method, and then the hot spot stress time history curves are obtained, and the stress amplitude statistics are carried out by using the rain flow statistics method. According to Miner's linear accumulative theory, the annual fatigue damage of nine representative points is calculated according to the T-type S _ (N) curve recommended by DNV Code, and the fatigue life of the platform under working conditions is evaluated. The results show that the fatigue life of 9 representative points meets the requirements. Thirdly, the corrosion fatigue and marine adhesion of the platform are quantitatively analyzed and evaluated. It is found that the corrosion will aggravate the structural fatigue, and the marine adhesion will increase the stress of the structure. Based on this conclusion, this paper puts forward the corresponding solutions and gives the maximum value of attachment thickness for marine biological clean-up. Finally, the force of the platform when the ship is berthing is calculated and analyzed in two aspects: forward berthing and lateral berthing. The results show that lateral berthing is safer than forward berthing. Based on the analysis of platform strength and equipment safety, the maximum normal berthing speed in lateral berthing and the maximum normal mooring speed in the absence of fenders are proposed, which can provide guidance for safe berthing.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95
【参考文献】
相关期刊论文 前10条
1 谢维维;秦立成;刘博;袁尚晨;;波浪载荷作用下的导管架海洋平台结构优化研究[J];中国水运(下半月);2013年07期
2 肖治国;张敬安;郑辉;李成钢;;海洋平台飞溅区腐蚀与防腐修复技术[J];全面腐蚀控制;2012年12期
3 魏立;张锐;魏钦;;番禺30-导管架的下部扣片吊装分析[J];中国造船;2012年S1期
4 李龙起;罗书学;;非均匀地基中倾斜桩基竖向承载特性模拟试验研究[J];岩土力学;2012年05期
5 施昌威;程承吉;张丽;;导管架平台的疲劳损伤计算方法研究[J];石油工程建设;2011年S1期
6 魏晓添;;海洋导管架结构的现状研究及应用前景[J];山西建筑;2010年19期
7 杨秀娟;修宗祥;闫相祯;冯永训;;基于疲劳可靠性优化设计的深水导管架平台多级模糊选型[J];中国石油大学学报(自然科学版);2010年02期
8 周后俊;周思柱;施昌威;华剑;;复杂载荷作用下海上导管架的疲劳寿命研究[J];石油机械;2009年08期
9 杨江辉;张宏;刘锦昆;何锋;;基于ABAQUS/AQUA的深水导管架平台动力分析研究[J];中国海洋平台;2007年06期
10 赵新铭;;基于Mindlin理论的Winkler地基参数动态Bayes识别[J];工程力学;2007年10期
相关会议论文 前1条
1 付方;肖花;杨帆;徐燕青;;基于随机波浪载荷的平台结构疲劳分析[A];’2008全国钢结构学术年会论文集[C];2008年
相关博士学位论文 前3条
1 修宗祥;深水导管架海洋平台安全可靠性分析及优化设计[D];中国石油大学;2010年
2 薛鸿祥;新型深海多柱桁架式平台及立管结构疲劳性能研究[D];上海交通大学;2008年
3 陆建辉;随机波浪载荷激励下海洋平台振动控制技术研究[D];中国海洋大学;2004年
相关硕士学位论文 前4条
1 刘超;考虑短期海况的海洋平台疲劳可靠性研究[D];中国海洋大学;2011年
2 芦颖;导管架平台的疲劳可靠性分析[D];大连理工大学;2009年
3 钱进;导管架平台疲劳可靠性分析[D];河海大学;2006年
4 黄怀州;导管架平台结构动力特性与动力可靠性分析[D];大连理工大学;2004年
，本文编号：2434776
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2434776.html
