Optimum arrangement of braces in jacket platform based on strength and ductility

Nonlinear behavior of jacket platforms is important in both design and rehabilitation issues that depends on the bracing arrangement. Both ductility and strength of the structures derived from pushover analysis are highly related to configuration of the braces. Considering a suitable criterion such as constant weight or constant stiffness and period of the structure in all arrangement cases, one can compare the capacity curves and find the best configuration. In this paper a simple logical method for investigating the strength and ductility of the jacket structure is presented, it is shown that global geometry and configuration of the braces are very important and effective in both strength and ductility parameters. Three parameters, normalized strength, normalized ductility and a combination of these two parameters are defined in order to have an engineering and practical index for comparing the results. At the end of the numerical discussion, the optimum configuration can be found. Such an investigation is very important in the initial design stage. Also, in assessment of existing platforms, it is very important to find the reliable strength and ductility of the structure. Such a study gives a deep view of this issue as well.     

海洋平台中玻璃钢管线防静电接地的做法

海洋平台工作环境恶劣,有酸雾,油污等,故对材质防腐要求较高。由于玻璃钢材质具有耐腐蚀,质量轻等优点,尤其是对重量要求严格的浮体项目中,在部分管线系统中被广泛采用。若管线安装在危险区域,如何对玻璃钢管线做防静电接地处理,对保护设备及人身的安全至关重要。首先介绍了静电的危害及防止的措施,然后分析了平台中玻璃钢管线的优缺点等特性及玻璃钢管线接地工艺、施工程序及接地电阻检验标准等,最后在巴油P70项目中进行玻璃钢管线防静电接地设计及安装。     

DP-3海工船舶动力辅助系统优化设计

阐述了DP-3海洋工程船舶动力辅助系统优化设计典型方案。通过归纳各主要船级社规范要求,在满足规范基本要求的基础上,通过举例说明各辅助系统设计优化建议,对类似船舶动力辅助系统设计提供建议及参考,以提高系统设计的安全性及可靠性。     

钻机模块在我国海上固定式平台上的应用（下）

详细介绍了我国海上固定式平台模块钻机的应用、集成创新、海上安装和项目管理等，对我国海上固定式平台模块钻机的国产化提出了建议。     

海上油气田上部设施管道支吊架的工程设计

以美国石油协会API14E和ANSI B31．3标准为基础，根据中国海洋石油工程公司的常用方法，对海上油气田上部设施管道设置中支吊架的基本形式和选用进行阐述。提供了管支吊架间距的设计方法，对管支吊架的材料选择和载荷的考虑进行分析，并根据支吊架的作用分析其在管道应力中的作用。最后给出了支吊架在工程设计中应当考虑的实际重点问题。     

近海结构任意倾斜桩腿的非线性波浪载荷计算

用Stokes非线性波浪理论计算速度与加速度,采用Morison公式求得任意倾斜柱体的波浪载荷,讨论了如何求小参数与波长、杆件的浸水长度等问题,编写的程序可以按照足够小的时间间隔t=2π/40计算出任意时刻构件或整体结构的波浪载荷,进而求得结构的最大波浪载荷可用于结构设计。     

浅谈海洋工程项目中的物资采购管理

文章以我国第一条“400英尺”自升式钻井平台的物资采购管理为例,从采购的特点、采购管理模式分析了物资采购管理在海洋工程中所起的重要作用。     

文昌14-3深水导管架的建造

海洋石油工程的发展是国家海洋事业的重要组成部分，而海洋工程中的平台制造是海上油气田开发的基础和保证。而随着现在工程越来越向深海区域发展，建造深水导管架必然将成为未来海洋工程发展的主流。以文昌14-3WHPA深水导管架的建造为例，介绍深水导管架在海洋工程中的建造过程、应用的新技术以及技术难点。     

太阳能供电系统在海上平台的应用

介绍海上平台太阳能供电系统的工作原理及主要参数的确定和计算；根据实际工程设计过程，比较不同设计、计算方法后，提出最优方法，并给出了设计实例；展望了太阳能供电系统在海洋油气开发的应用前景。     

Mobile offshore bases—an overview of recent research

The Mobile Offshore Base (MOB) is a multipurpose, floating logistics base which can be stationed in coastal or international waters. The offshore base is comprised of self-propelled modules that are connected together at sea to form a runway and support base for fixed-wing aircraft and helicopters. The MOB is used as a prepositioned cargo stowage and transshipment point, enabling the movement of cargo to and from ships in an open seaway. Described here is an approach to developing a mobile, offshore basing capability. The work is discussed in context of two significant MOB projects including a discussion of criteria and major technical issues. Presented at the International Workshop on Very Large Floating Structures (VLFS'96), 25–28 November 1996, Hayama, Japan