海洋平台浮托安装中横荡护舷限位和缓冲性能分析     

刘利壮  王树青  潘沈浩 《海洋工程》2016,34(6):21-29

浮托安装法,是相对于传统吊装法的一种新型海洋平台安装方法,具有起重能力大、作业周期短、安装费用低、适用范围广、操作安全方便等优点,解决了海上大型平台组块的安装问题。为了研究横荡护舷对浮托安装的影响,首先对海洋平台浮托安装中的护舷装置进行了介绍,然后针对某工程实例应用AQWA软件进行了数值模拟,并进行了模型验证。从时域方面对就位状态下的浮托模型进行了耦合动力分析,研究了横荡护舷参数对驳船运动和撞击力的影响规律。研究表明,横荡护舷可以有效地减小驳船运动和撞击力,其限位和缓冲作用与护舷尺寸及护舷刚度均有关。研究结果可为实际浮托安装工程提供重要的参考。  相似文献   

Coupled Responses of Sewol, Twin Barges and Slings During Salvage     

YAO Zong  WANG Wei-ping  JIANG Yan  CHEN Shi-hai 《海洋工程》2018,32(2):226-235

Korean Sewol is successfully lifted up with the strand jack system based on twin barges. During the salvage operation, two barges and Sewol encounter offshore environmental conditions of wave, current and wind. It is inevitable that the relative motions among the three bodies are coupled with the sling tensions, which may cause big dynamic loads for the lifting system. During the project engineering phase and the site operation, it is necessary to build up a simulation model that can precisely generate the coupled responses in order to define a suitable weather window and monitor risks for the salvage operation. A special method for calculating multibody coupled responses is introduced into Sewol salvage project. Each body’s hydrodynamic force and moment in multibody configuration is calculated in the way that one body is treated as freely moving in space, while other bodies are set as fixed globally. The hydrodynamic force and moment are then applied into a numerical simulation model with some calibration coefficients being inserted. These coefficients are calibrated with the model test results. The simulation model built up this way can predict coupled responses with the similar accuracy as the model test and full scale measurement, and particularly generate multibody shielding effects. Site measured responses and the responses only resulted from from the simulation keep project management simultaneously to judge risks of each salvage stage, which are important for success of Sewol salvage.  相似文献   

大连中远浮船坞工程海上基桩施工技术     

李华 卢飞赵振峰  李贵华 《探矿工程》2007,34(4):6-8,11

大连中远30万t浮船坞工程是目前国内最大的浮船坞工程，共设计海上基桩30根，桩径800mm，嵌入中风化岩石4～5m，最深达8m。利用驳船进行海上基桩施工，采用FGC-15D型大直径湿式反循环潜孔锤钻进成孔，满足施工工艺和工期要求。  相似文献   

关于大直径钢筋混凝土薄壁圆筒内抛石施工的分析     

罗鹏  李慧贤 《海岸工程》2009,28(3):58-63

随着港口建设日新月异的发展，大直径钢筋混凝土薄壁圆筒结构以其受力合理、结构简单、造价低等诸多优点脱颖而出。在大圆筒结构施工过程中，筒内抛石是一项重要工艺，以日照港某大圆筒码头筒内的抛石施工为例，对此工序进行分析，考虑当地施工条件的特殊性，进行了必要的技术处理。  相似文献