沿海油轮船体的加长改装

本文主要阐述了沿海油轮在船体加长改装工程中的改装工艺、难点解决、安全管理、质量管理、周期控制等。     

油轮单壳改双壳的变形控制实施研究

主要阐述了油轮单壳改双壳工程中的重点和难点一变形控制，介绍了在工程实施过程中采取分期分阶段施工的方法，合理安排现场工艺孔的开设，并加强施工过程中的现场监控和测量，使整体变形控制在2mm之内，符合船舶检验要求。     

油轮洗舱过程中的静电防护

介绍了几次由于油轮洗舱引起的静电而导致的几次重大事故及其油舱洗舱的目的和分类,接着分析了洗舱中产生静电的原因,重点叙述了油舱洗舱的具体保护措施,在每个环节都要重视静电问题,日常操作和管理中严格执行油舱安全管理条例,减少和控制静电事故的发生。     

油轮消防安全管理浅淡

一、油轮消防安全管理总体要求 船舶尤其是油轮的消防安全管理是一个系统工程，应始终贯穿于公司各项工作和船舶各种状态及各项活动（操作）之中。毋庸置疑，船舶一旦发生火灾将直接威胁人命、船舶以及货物的安全，甚至可能造成无法估量的环境破坏。为了保障船上人员生命安全和船舶的安全营运，在日常各项安全运行控制工作（活动）中加强船舶消防管理显得尤为重要。     

油轮“钻石”的FPSO改装设计

FPSO是海洋石油开采的重要装备,旧油轮改装是FPSO的重要来源之一。文章以油轮＂钻石＂（RADIANT JEWEL）为例,介绍旧油轮的FPSO改装设计。     

油轮消防安全管理浅淡

一、油轮消防安全管理总体要求 船舶尤其是油轮的消防安全管理是一个系统工程,应始终贯穿于公司各项工作和船舶各种状态及各项活动（操作）之中。毋庸置疑,船舶一旦发生火灾将直接威胁人命、船舶以及货物的安全,甚至可能造成无法估量的环境破坏。为了保障船上人员生命安全和船舶的安全营运,在日常各项安全运行控制工作（活动）中加强船舶消防管理显得尤为重要。     

首航美国油轮如何获得TVEL证书

此文介绍了美国海岸警卫队对首航美国海域的油轮进行检视、目视、观察和巡视的控制项目，作者根据亲身接受检查的经历，提出了应付安全检查的对策，以便首航美国的油轮能顺利获得油轮安检证书(TVEL)。     

2012，油轮竞争“你死我活”

挪威投行北极证券（Artvic Securities）航运部门的最新一份新年特别报告称，对于油轮行业，2012年甚至到2013年，原油油轮公司将面临激烈竞争，行业内大鱼吃小鱼的兼并战料将此起彼伏。     

对油轮公司船舶能效管理实施架构的探讨

船舶营运能效管理计划即将实施,油轮公司将制定油轮能效管理计划和船队能效管理体系,通过计划和体系的实施,推进油轮公司船队更安全、节能、环保地营运。     

Optimization of Wigley Hull Form in order to Ensure the Objective Functions of the Seakeeping Performance

The research performed in this paper was carried out to investigate the computational procedure to design seakeeping optimized ship hull form. To reach the optimized hull form, four stages should be done, which consists of： generate alternative hull form, seakeeping calculations, objective functions and optimization techniques. There are many parameters that may be determined in ship hull form optimization. This paper deals with developed strip theory for determining the seakeeping performance, genetic algorithm （GA） as optimization method, high order equations for curve fitting of the hull form and finally reaching to the minimum bow vertical motion in regular head waves. The Wigley hull is selected as an initial hull and carried to be optimized. Two cases are considered. For the first case, the only form coefficients of the hull （CB, CM, Cw, Cp） are changed and main dimensions （L, B, 7） are fixed. In the second case both hull form and main dimensions are varied simultaneously. Finally, optimized hull form and its seakeeping performances are presented. The results of optimization procedure demonstrate that the optimized hull forms yield a reduction in vertical motion and acceleration.     

Vibration reduction of main hulls using semiactive absorbers

A semiactive-type absorber for vibration reduction of main hull girders was investigated. The semiactive absorber system includes a moving mass, support springs, dynamic dampers, and a control system. Only a small electrical power supply is needed for control of the damper valve and the operation of the control system. In this paper, the dynamics of the ship's hull and the constraints of the semiactive absorber are described first. Then, a suboptimal operation law is derived based on the properties of the absorber and the theory of optimal vibration reduction. The numerical simulation results show that the semiactive absorber is more efficient in hull vibration reduction than the passive absorber during critical periodical excitation from the propeller. The vibration caused by multifrequency excitation can also be suppressed by the semiactive absorber. In terms of effectiveness, the semiactive absorber is almost as effective as the active absorber. In particular, the performance of the semiactive absorber is excellent in the reduction of high-frequency fluctuations.List of symbols C _h ⁽ⁱ⁾ damping matrices of the segmenti - C _sb structural damping coefficient of bending - C _ss structural damping coefficient of shear - C _v hydrodynamic damping coefficient - EI flexural rigidity - f _a force generated by the absorber - f _ad damper force of the semiactive absorber - f _ext total excitation force - F _ext ⁽ⁱ⁾ generalized load vector in segmenti - teÎ the identity matrix - J performance index - J _r rotatory moment of inertia - k _a stiffness coefficient of the absorber - K _h ⁽ⁱ⁾ stiffnes matrices of the segmenti - K _s A _s G _s shear rigidity - k _v hydrodynamic spring coefficient - l _k length of the segmentk - m _a mass of the absorber - M _ext total exciting moment - M _h ⁽ⁱ⁾ mass matrices of the segmenti - m _v mass moment of inertia - w _h deflection of the center line of the hull - W _h ⁽ⁱ⁾ vertical translation and shear slope of nodes in segmenti - ¯ w _d displacement of the absorber mass relative to the hull - ¯ w _a absolute displacement of the absorber mass - ¯ w (a, t) absolute upward displacement of the hull atx=a - slope deflection due to bending - slope deflection due to shear - Dirac delta function - _k ⁽ⁱ⁾ Kronecker delta function - _k distribution function - shape function vector     

基于NFFD 算法的船体几何变形技术

本文以非均匀有理B样条基函数作为参数体属性,并结合非均匀控制点网格,建立了适用于船体几何的NFFD变形技术。重点阐述了NFFD方法的基本原理和变形规则,并以矩阵表示方法为基础构建了数学模型。研究了控制点数量和分布对变形结果的影响,增加了控制点变形几何的能力并获得了更大的设计空间。最后,以某CNG运输船为例完成了球鼻艏、船艏和船艉部分几何的自动变形。本文的工作为船型优化提供了良好的变形工具。     

51800DWT冰区加强型成品油轮船体结构设计

51800DWT冰区加强型化学品／成品油轮是广船国际自行开发设计的、具有世界先进水平的北极冰区航线成品油／化学品船。该船可满足全球造船业所公认的高等级规范“瑞典-芬兰冰级1Asuper”。本文结合冰区加强结构设计介绍该船的船体结构设计特点。     

"帕罗斯·勇士"轮船体改装生产设计概述

文章通过对"帕罗斯.勇士"轮成功改装的设计总结,简要介绍了油轮单壳改双壳,船体改装生产设计的工艺过程,并对工艺中可能出现的问题进行了讨论。就船厂而言,如何充分利用工厂自身条件合理制定出既切实可行,又能为船东和船级社所接受的改装设计,有其特别的实际意义。     

“大庆436”油船改装中的若干技术问题研究

对"大庆436"油船在单壳改为双壳设计过程中对破舱稳性、装载限制、结构布置和改装工艺等进行了分析研究,并提出了解决方法。通过增加双舷侧等,使该船满足新的规范要求。     

大型集装箱船加装混合式脱硫系统船体设计

基于多型超大型集装箱船加装镁基法混合式脱硫系统工程项目,从船体设计的角度分析总结了改装要点。根据混合式脱硫塔系统新增的设备和舱柜,以及布置和系统上的要求,重点研究了加装过程中烟囱外形和结构尺寸、舱柜布置、烟囱振动以及防沉淀等关键技术问题。本文为大型箱船或其它船型安装混合式废气脱硫提供了技术参考和设计经验。     

A simple formulation for predicting the ultimate strength of ships

The aim of this study is to derive a simple analytical formula for predicting the ultimate collapse strength of a single- and double-hull ship under a vertical bending moment, and also to characterize the accuracy and applicability for earlier approximate formulations. It is known that a ship hull will reach the overall collapse state if both collapse of the compression flange and yielding of the tension flange occur. Side shells in the vicinity of the compression and the tension flanges will often fail also, but the material around the final neutral axis will remain in the elastic state. Based on this observation, a credible distribution of longitudinal stresses around the hull section at the overall collapse state is assumed, and an explicit analytical equation for calculating the hull ultimate strength is obtained. A comparison between the derived formula and existing expressions is made for largescale box girder models, a one-third-scale frigate hull model, and full-scale ship hulls.List of symbols A _B total sectional area of outer bottom - A _B total sectional area of inner bottom - A _D total sectional area of deck - A _S half-sectional area of all sides (including longitudinal bulkheads and inner sides) - a _s sectional area of a longitudinal stiffener with effective plating - b breadth of plate between longitudinal stiffeners - D hull depth - D _B height of double bottom - E Young's modulus - g neutral axis position above the base line in the sagging condition or below the deck in the hogging condition - H depth of hull section in linear elastic state - I _s moment of inertia of a longitudinal stiffener with effective plating - l length of a longitudinal stiffener between transverse beams - M _E elastic bending moment - M _p fully plastic bending moment of hull section - M _u ultimate bending moment capacity of hull section - M _uh ,M _us ultimate bending moment in hogging or sagging conditions - r radius of gyration of a longitudinal stiffener with effective plating [=(I _s /a _s )^1/2] - t plate thickness - Z elastic section modulus at the compression flange - Z _B ,Z _D elastic section modulus at bottom or deck - slenderness ratio of plate between stiffeners [= (b/t)(_y/E)^1/2] - slenderness ratio of a longitudinal stiffener with effective plating [=(l/r)(_y/E)^1/2] - _y yield strength of the material - _yB , _yB , _yD yield strength of outer bottom, inner bottom - _yS deck, or side - _u ultimate buckling strength of the compression flange - _uB , _uB , _uD ultimate buckling strength of outer bottom - _uS inner bottom, deck, or side     

"CR-02"6000m无人自治水下机器人载体系统

“CR－02”6000m无人自治水下机器人（AUV）是基于“CR－02”6000m机器人的改进型。“CR－02”机器人的最大工作深度为6000m。它的一项重要功能是通过采用艏部垂向和横向对转槽道桨，使其具有海山爬坡能力；另一重要功能是它具有先进的测深侧扫声纳，抚仙湖的试验结果表明艏部对转槽道桨大大改善了机器人的机动性。本文简要地介绍了机器人的主要技术特性和参数、载体线型、推进系统和框架结构。     

一种船体外板自动成形检测方法

利用安装在直角坐标机械手上的激光传感器采集船体外板表面各条肋骨一系列离散点的三维坐标,由此逆向回归出整个外板曲面;基于空间坐标转换及误差分析理论,对比理论肋骨型线,分别对加工后外板的横、纵向成形及扭曲进行计算和判别,并作为未成形板材二次加工的控制依据。