Active heave compensation of floating wind turbine installation using a catamaran construction vessel

The application of floating wind turbines is limited by the high cost that increases with the water depth. Offshore installation and maintenance continue to consume a high percentage of the project budget. To improve the installation efficiency of the floating offshore wind turbine, a novel concept is proposed by the SFI MOVE project. Several wind turbine superstructure components are preassembled onshore and carried to the installation site by a catamaran construction vessel. Each assembly can then be installed using only one lift, and the concept is less sensitive to weather conditions. In this paper, a control algorithm of the proposed hydraulic active heave compensator system is developed using singular perturbation theory to cancel the relative motion between the spar top and gripped preassembly bottom. Closed-loop stability is proven, and the simulation results show that the installation efficiency is improved with an increase in the acceptable weather conditions.     

职业技能大赛背景下高职船舶电气自动化专业建设的优化研究

为了适应市场需求,提高船舶电气专业学生综合素质,文章结合新STCW公约,通过职业技能大赛对专业建设的影响进行分析和探索,从人才培养模式、课程体系与课程建设、实训基地和师资队伍等方面提出促进高职船舶电气专业优化建设的具体策略。     

某轮主机液压排气阀敲击故障研究

文章通过对某轮柴油主机排气阀异常敲击事故的分析,得出了排气阀敲击的原因及故障排除方法,并提出在船舶维护管理中相应的防护措施。     

SULZER主机排气阀顶升机构及凸轮移位故障研究

文章针对某轮主机排气阀顶升机构连续发生六次故障的处理过程进行研究,分析了故障发生的机理,提出了轮机管理人员在设备使用管理过程中应注意的深层次原因,并提出了解决方法,以期为同类事故的预防提供借鉴。     

关于创建海事咨询中心的思考

在寻找提高学生专业知识、应用能力和实践能力的教学改革中,以校企合作的办学模式为结合点.借鉴我国高校盛行的诊所式法律教育的精神,立足于课程改革.以企业咨询的问题作为学生学习的真实环境,在指导老师带领学生解决案例的同时,也给企业提供了法律服务及业务咨询.     

“船舶发电机手动准同步并车”的实训教学方法设计

通过分析相关专业的能力目标要求,针对《船舶电站实训》课程中"船舶发电机的手动准同步并车"这一重要教学课题,从实训内容的教学内容的选择、实训方法的设计、实施方案的设计、独立工作能力培养等方面进行了分析和论述。总结了实践这一方案后的教学的效果及促进学生在船舶电站理论知识、同步检测方法、发电机手动准同步并车操作技能的起的作用。     

船用辅锅炉自动控制系统设计与分析

文章在分析了船用辅锅炉控制系统设计要求的基础上,采用可编程控制器为控制核心,开发出上位组态监控系统及下位可编程控制器控制程序,并完成了相关信号的数据通讯,设计了一套船舶辅锅炉控制系统。本系统可实现对船舶辅锅炉相关运行参数及控制元部件的监控调节,满足相关规范要求。     

A unified fatigue life prediction method for marine structures

Marine structures such as ships and offshore platforms are mostly designed with damage tolerance and this design philosophy requires accurate prediction of fatigue crack propagation process. Now more and more people have realized that only a fatigue life prediction method based on fatigue crack propagation (FCP) theory has the potential to satisfy the accuracy requirement and to explain various fatigue phenomena observed. In the past several years, the authors’ group has made some efforts in developing a unified fatigue life prediction (UFLP) method for marine structures. The key issue for this development is to establish a “correct” crack growth rate relation. In this paper the improvement of the crack growth rate model is dealt with first. A new crack growth rate model based on the concept of partial crack closure is presented. The capability of the model is demonstrated. Secondly, studies on the engineering approaches to determine the parameters in the new crack growth rate model are carried out and validated by comparing with the experimental results on a wide range of alloys. Thirdly, the preliminary studies on some significant problems such as load sequence effect are presented. Finally, further studies for the application of the UFLP method to the fatigue strength assessment of marine structures are pointed out.     

船舶传动装置润滑系统仿真计算研究

结合船舶传动装置的系统部件结构特点深入分析了润滑系统的工作原理,并基于流体网络算法发展了润滑系统各元件流动阻力特性计算模型.采用自主开发的润滑系统仿真计算软件对某船舶传动装置润滑系统进行了数值仿真,获得了润滑系统内滑油压力分布和流量分配情况.仿真结果与试车数据最大相对误差均保持在6%以内,满足工程要求.