50500DWT(D)型化学品/成品油轮首制船调试浅析

本文介绍了50500DWT(D)型化学品/成品油船首制船调试过程中,本人负责的项目所出现的问题,如GMDSS和自动舵系统调试过程中出现的主要问题、解决方法和问题总结。     

51800DWT冰区加强型化学品/成品油船自动舵系统调试

本文介绍了51800DWT冰区加强型化学品/成品油船自动舵系统的系统组成,以及在安装调试过程中的主要问题和分析解决方法。     

The dynamic scheduling model of battlefield rush-repair tasks

During the war, equipment is constantly being damaged with limited battlefield rush-repair time and power. Therefore, some military problems are presented in this paper. In order to get more fighting time for damaged equipment to participate in operation again as much as possible, three problems should be considered properly. The first problem is how to dynamically choose the most suitable damaged equipment for each repair group. The second one is how to divide tasks between different groups. The third one is how to determine execution sequence in the same group. A mathematical model is established to solve the dynamic battlefield rushrepair task scheduling problem (DBRTSP) in wartime. A variant genetic algorithm is designed to dynamically track the change of the optimal solution. A scheduling example is solved through Matlab. Results show that the proposed model is not only scientific and reasonable, but also convenient and efficient.     

沉管预制侧模承载力分析

侧模的稳定性是沉管尺寸精度控制的关键,主要判断依据是承载力大小。不同工况对模板承载力的需求不一样,应合理设计模板结构。但有时为了追求"绝对"的稳定性,模板设计存在过于保守的现象,导致了材料的浪费,增加了工程投资成本。本文选取港珠澳大桥岛遂工程沉管预制侧模体系为研究对象,建立空间三维模型,假设不同结构设计情况下分析承载力的变化情况。模拟结果表明,侧模结构设计过于保守,影响结构承载力的关键因素是结构构件设计间距。因此,在侧模体系设计时,应充分考虑结构构件之间间距问题,可适当降低钢材属性,节约投资。     

曲线段沉管预制模板应用研究

港珠澳大桥岛隧工程沉管预制采用工厂法流水线施工,是迄今为止世界上体积最大的钢筋混凝土预制构件,模板采用德国PERI公司设计的液压自动化大型钢模板,具有精度高、操作方便、工效高等优点。此模板系统不仅适用于直线段管节预制,也适用于曲线段管节预制施工。文中简要论述了模板结构、工作原理和曲线段模板施工工艺,以期为类似工程提供借鉴。