Transportation of Floating Structures by Using Newly Built Heavy Lifting Semi Vessel HYSY278

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.

免水分离的双钩套扎针辅助单孔腹腔镜内环腹膜外结扎术

目的探讨免水分离技术的双钩套扎针辅助单孔腹腔镜腹股沟内环结扎的可行性和安全性。方法 2016年5月～2017年12月,102例(139侧)小儿腹股沟斜疝在经脐单孔腹腔镜监视下,将双钩套扎针钩挂结扎线经腹横纹内环体表投影处穿刺至内环前壁腹膜外,旋转钩针使钩针斜面背离术者视野,顶起后腹膜,利用钩针锹面顺势推进越过输精管与后腹膜之间间隙,在危险三角内抛置丝线于腹腔内;钩针沿原路退回至内环前壁腹膜外,再次进针经内环外侧间隙至精索血管外侧,旋转钩针使钩针斜面背离术者视野,顶起后腹膜,利用钩针锹面顺势推进越过精索血管与后腹膜之间间隙,沿此前针孔穿透后腹膜进入腹腔钩挂预置线牵出体外结扎闭合内环口。结果 139侧手术均获成功,未借助操作器械辅助。单侧(65例)和双侧(37例)手术时间分别为(10.8±2.4) min和(17.6±2.9) min。平均随访13(7～26)个月,未出现伤口感染、医源性隐睾或睾丸萎缩等并发症,无复发疝、鞘膜积液和皮肤肉芽肿形成。结论免水分离技术的双钩套扎针辅助单孔腹腔镜内环结扎术安全、有效、简便,脐窝瘢痕隐蔽,美观,是治疗小儿腹股沟疝的可靠技术。

免水分离改良钩针辅助单孔腹腔镜内环腹膜外闭合治疗儿童腹股沟斜疝

目的探讨免水分离法应用于改良钩针辅助单孔腹腔镜内环腹膜外闭合治疗儿童腹股沟斜疝的安全性、有效性及可操作性。方法 2017年12月至2018年4月,在河北医科大学第二医院小儿外科收治的腹股沟斜疝患儿中,32例采用免水分离法实施改良钩针辅助单孔腹腔镜内环腹膜外闭合治疗。在脐单孔腹腔镜监视下,将改良钩针钩挂丝线经腹横纹内环体表投影处穿刺至内环前壁腹膜外,旋转钩针使钩针斜面背离术者视野,顶起后腹膜,利用钩针锹面顺势推进越过输精管与后腹膜之间间隙,在危险三角内抛置丝线于腹腔内;钩针沿原路退回至内环前壁腹膜外,进针经内环外侧间隙至精索血管外侧,再次旋转钩针使钩针斜面背离术者视野,顶起后腹膜,利用钩针锹面顺势推进越过精索血管与后腹膜之间间隙,沿此前针孔穿透后腹膜进入腹腔钩挂预置线牵出体外结扎闭合内环口。回顾性分析患儿基本情况、手术情况。对所有患儿随访至术后6～10个月,分析术后复发率和并发症发生情况。结果32例患儿的年龄为12个月～2岁6个月,男27例,女5例。术前诊断单侧腹股沟疝25例,双侧7例。术中证实单侧疝21例,双侧疝11例。43侧疝均采用免水分离方法实施改良钩针辅助单孔腹腔镜内环腹膜外闭合术。单侧和双侧疝的平均手术时间分别为(8.2±1.6)和(16.5±1.5) min。术后随访6～10个月,未出现伤口感染、医源性隐睾或睾丸萎缩等并发症,无复发疝、鞘膜积液和皮肤结肉芽肿形成。结论采用免水分离方法实施改良钩针辅助单孔腹腔镜内环腹膜外闭合术治疗小儿腹股沟斜疝,操作安全便捷,手术效果满意。

基于HYDROSTAR的大型半潜船波浪载荷预报研究

在船舶结构的强度分析中,波浪载荷是外载荷的重要组成部分,一般可按船级社经验公式计算。对超出规范适用范围的船舶需直接计算。文章采用数值分析软件HYDROSTAR,基于等效设计波法,对某大型半潜船进行了波浪载荷的直接计算,并总结了等效设计波的计算方法和流程。