Transportation of floating structures for long distance has always been associated with the use of heavy semi transport vessel. The requirements of this type of vessel are always special, and its availability is limit...Transportation of floating structures for long distance has always been associated with the use of heavy semi transport vessel. The requirements of this type of vessel are always special, and its availability is limited. To prepare for the future development of the South China Sea deepwater projects, COOEC has recently built a heavy lift transport vessel - Hai Yang Shi You 278 （HYSY278）. This semi-submersible vessel has displacement capacity of 50k DWT, and a breath of 42 m. Understanding the vessel＇s applicability and preparing its use for future deepwater projects are becoming imminent need. This paper reviews the critical issues associated with the floating structure transportation and performs detailed analysis of two designed floating structures during transportation. The newly built COOEC transportation vessel HYSY278 will be used to dry transport the floating structures from COOEC fabrication yard in Qingdao to the oil field in the South China Sea. The entire process will start with load-out/float-offthe floating structures from the construction sites, offload the platform from the vessel if needed, dry transport floating structures through a long distance, and finally offload the platform. Both hydrodynamic and struc^tral analyses are performed to evaluate transport vessel and floating structures. Critical issues associated with the transportation and offloading of platform from the vessel will be studied in detail. Detailed study is performed to evaluate the response of the system during this phase and additional work needed to make the vessel feasible for use of this purpose. The results demonstrate that with proper modifications, HYSY278 can effectively be used for transporting structures with proper arrangement and well-prepared operation. The procedure and details are presented on the basis of study results. Special attentions associated with future use will also be discussed based on the results from analysis.展开更多
基于多学科交叉技术,本文提出了一种考虑运动和动力耦合的复杂多体系统优化设计分析方法。基于ADAMS(Automatic Dynamic Analysis of Mechanical Systems)平台建立全回转重吊船刚柔耦合虚拟样机,以AQWA(Advanced Quantitative Wave Anal...基于多学科交叉技术,本文提出了一种考虑运动和动力耦合的复杂多体系统优化设计分析方法。基于ADAMS(Automatic Dynamic Analysis of Mechanical Systems)平台建立全回转重吊船刚柔耦合虚拟样机,以AQWA(Advanced Quantitative Wave Analysis)软件计算的船体水动力时域响应作为运动驱动,完成典型服役海况下系统关键区域应力耦合响应特征分析。依托ANSYS有限元软件优化模块,结合客观熵权TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution)决策方法得到该区域最优设计方案。分析表明:船体横摇及垂荡对支撑区域动力响应影响较大;相较船体静止,横摇、垂荡耦合运动使吊装绳索张力与支撑区域关键节点应力增幅均超过20%;对比初始方案支撑结构的钢材用量,最优方案可节省12.30%。将虚拟样机技术与有限元力学分析结合并融入管理科学的多目标优化和多准则决策,可提高复杂多体系统的分析效率,得到科学合理的设计方案。展开更多
基金funded by the State Key Project "Installation Technical Study for Deepwater Floating Structure"
文摘Transportation of floating structures for long distance has always been associated with the use of heavy semi transport vessel. The requirements of this type of vessel are always special, and its availability is limited. To prepare for the future development of the South China Sea deepwater projects, COOEC has recently built a heavy lift transport vessel - Hai Yang Shi You 278 （HYSY278）. This semi-submersible vessel has displacement capacity of 50k DWT, and a breath of 42 m. Understanding the vessel＇s applicability and preparing its use for future deepwater projects are becoming imminent need. This paper reviews the critical issues associated with the floating structure transportation and performs detailed analysis of two designed floating structures during transportation. The newly built COOEC transportation vessel HYSY278 will be used to dry transport the floating structures from COOEC fabrication yard in Qingdao to the oil field in the South China Sea. The entire process will start with load-out/float-offthe floating structures from the construction sites, offload the platform from the vessel if needed, dry transport floating structures through a long distance, and finally offload the platform. Both hydrodynamic and struc^tral analyses are performed to evaluate transport vessel and floating structures. Critical issues associated with the transportation and offloading of platform from the vessel will be studied in detail. Detailed study is performed to evaluate the response of the system during this phase and additional work needed to make the vessel feasible for use of this purpose. The results demonstrate that with proper modifications, HYSY278 can effectively be used for transporting structures with proper arrangement and well-prepared operation. The procedure and details are presented on the basis of study results. Special attentions associated with future use will also be discussed based on the results from analysis.
文摘基于多学科交叉技术,本文提出了一种考虑运动和动力耦合的复杂多体系统优化设计分析方法。基于ADAMS(Automatic Dynamic Analysis of Mechanical Systems)平台建立全回转重吊船刚柔耦合虚拟样机,以AQWA(Advanced Quantitative Wave Analysis)软件计算的船体水动力时域响应作为运动驱动,完成典型服役海况下系统关键区域应力耦合响应特征分析。依托ANSYS有限元软件优化模块,结合客观熵权TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution)决策方法得到该区域最优设计方案。分析表明:船体横摇及垂荡对支撑区域动力响应影响较大;相较船体静止,横摇、垂荡耦合运动使吊装绳索张力与支撑区域关键节点应力增幅均超过20%;对比初始方案支撑结构的钢材用量,最优方案可节省12.30%。将虚拟样机技术与有限元力学分析结合并融入管理科学的多目标优化和多准则决策,可提高复杂多体系统的分析效率,得到科学合理的设计方案。
