船舶纵倾优化节能策略

为研究船舶纵倾优化节能策略,应对能源、环境问题和低迷的航运市场,实现节能减排,以船舶纵倾优化技术为研究对象,通过分析优化原理和优化方法,提出采取经济航速、合理设定船舶纵倾角度、在优化状态下合理操船等措施船舶纵倾优化节能策略。     

GMDSS课程教学中的有效方法

针对GMDSS课程特点,探讨GMDSS课程设置顺序和相关的教学方法,阐述GMDSS教学中的打比方教学法、关联教学法、对比教学法、总结教学法、举例教学法和回忆教学法的特点和重要作用。     

长江口安全通航控制研究

文中初步分析了长江口水域船舶通航现状,通过事故统计分析,并结合船舶的操纵特性,提出了长江口安全通航控制措施。     

船舶防台安全管理对策研究

台风对船舶的航行安全造成极大的破坏性。安全防台是船舶的一项重要任务之一。文中在分析台风的特性和船舶操纵特性基础上,提出了海上航行船舶防台、港内船舶防台、港内无动力船舶防台的基本措施。     

我国航海高等教育模式的改良

为改良我国高等航海教育模式,提高我国高等航海教育水平,分析我国航海高等教育现状及弊端,在借鉴国外航海教育发达国家经验基础上,提出我国高等航海教育改革具体措施:加强校企合作,采取订单式人才培养模式,强化学生动手能力、航海精神和英语应用能力的培养。     

宁波舟山港老塘山港区锚地资源紧缺原因分析及对策

为有效解决宁波舟山港老塘山港区船舶停泊锚位需求与锚地资源紧缺的矛盾,搜集老塘山港区锚地的船舶数据,从船型分布、吨位分布进行规律分析,并将理论与数据相结合,针对老塘山港区锚地资源紧张的主要原因提出相关对策:开发新的锚泊技术;开发新的锚地资源;优化现有锚地资源;强化监管技术;协同码头、航道、锚地三方,提高效率。     

Comparison on hydraulic characteristics between orifice plate and plug

Orifice plate energy dissipater as well as plug energy dissipater, as a kind of effective energy dissipater with characteristics of simple structure, convenient construction and high energy dissipation ratio, has become welcomed more and more by hydraulics researchers. The two kinds of energy dissipaters with sudden reduction and sudden enlargement forms are similar in energy dissipation mechanism, but there are differences in energy dissipation characteristics and cavitation characteristics. In the present paper, the differences between orifice plate and plug in energy loss coefficient, relating to their energy dissipation ratio, in the backflow region length, relating to their energy loss coefficient, and in the lowest wall pressure coefficient, relating to their cavitations risk, were analyzed by numerical simulations and physical experiment, and their features in above three aspects were also revealed. The results of research in the present paper demonstrate that the backflow region length of orifice plate is longer than that of plug at the same contraction ratio, the lowest wall pressure coefficient of plug is smaller than that of orifice plate at the same contraction ratio, and the energy loss coefficient of orifice plate is bigger than that of plug, which illustrates that plug is superior to orifice plate in resistance cavitation damage at the same contraction ratio.     

狭水道船舶安全通航控制

国际海洋运输是国际贸易中最主要的运输方式,占国际贸易总运量中的三分之二以上,我国绝大部分进出口货物,都是通过海洋运输方式运输的。而狭水道是在船舶海洋运输中经常经过的特殊航行区域,在其中航行易受风、流、浅水效应等众多不利且复杂因素的影响,船舶操纵极其困难,时而有碰撞事故发生。为确保船舶在狭水道中的安全通航,文中阐述狭水道的概念,分析狭水道的各种环境条件和航行特点,客观制定了保障船舶在狭水道中安全航行的措施。     

圆形桥墩紊流范围数值研究

合理布置桥区航道对于船舶在桥区的安全航行非常重要.桥墩的紊流范围是布置桥区航道时要考虑的一个重要指标.文中分析了顺直航道圆形桥墩紊流范围的相关主控因素.通过设置主控因素的序列数据,数值模拟计算并经回归分析,得出了顺直航道圆形桥墩最大紊流范围的经验表达式.研究结果表明,桥墩最大紊流范围与水面流速和桥墩直径密切相关,且流速和桥墩直径越大,桥墩紊流最大范围也越大.