“青云”轮改装的简化工艺设计

以“青云”轮改装为例,介绍了船舶改装的主要项目和简化工艺设计的方案,以及船舶改装简化工艺设计的具体工艺,措施和由带带来的一系列优点。     

“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。     

“博远一号”运输船改装设计

军用登陆艇改装为民用运输船,其设计总体改装方案、改装工艺是成功的,值得总结介绍。     

1000m^3运木船的改建

本文从总体性能和船体结构两方面对1000 m~3运木船改装工程的总工艺方案、线型设计、总布置设计和结构改装设计等技术问题作了概要叙述。     

某轮船体接长工艺技术研究

文章介绍了某轮改装、船体接长工艺技术的研究过程.它解决了"放水移位法"中多项定位技术难题,同时提高了生产效率,降低了生产成本,是今后同类接长船改装的首选工艺.     

“信赖”轮缩短改装工程完美收官

正4月16日上午,随着自卸散货船"信赖"轮缓缓驶离舟山万邦永跃船舶修造有限公司30万吨级码头,这标志着"万邦永跃"圆满地完成了该轮切断缩短改装工程,再次让船东和船级社竖起了大拇指点了赞。该轮隶属于澳大利亚CSL公司,由于靠泊需要,需对原船进行切断缩短改装(缩短4.25m)。舟山万邦永跃船舶修造有限公司凭借品牌和市场影响力,最终锁定订单。为了做好此次改装工作,改装工艺细化到每个可能出现的问题及解决办法,以高质量标准要求自己,不敷衍不推诿,     

船用电缆对接修补工艺探讨

文章阐述了在船舶加长改装工程中,电缆的割断及修复的工艺要求,确保改装完成后使电缆满足使用要求,文章对电缆对接修补工艺进行了总结,可为以后该方面的改装提供参考。     

船研环保为“深潜号”进行压载水系统改装

近日,上海船研环保Cyeco压载水处理系统又完成了突破性改装案例,为中国首艘300米饱和潜水母船"深潜号"进行了压载水安装。"深潜号"的改装方案极具挑战性,对设备体积及管路设计等都有很高要求,此次改装项目选用了船研环保的Cyeco—B400型的压载水处理装置,成功在狭小空间内将Cyeco压载水装置高度降至1.6m,占地面积小于2.5m2。     

浅谈"金马"轮轴系修理

船舶改装是修船发展的一个趋势 ,但改装后轴系的对中却是一项难度较高的课题 ,如何制定准确、行之有效的解决方法 ,对降低成本、保证船期非常重要。文章介绍了一艘客船改装成为豪华游艇后 ,在轴系发生严重变形的情况下 ,如何确定修复轴系对中方案 ,供同行借鉴     

"大洋一号"海洋科学考察船动力定位系统的设计考虑

“大洋一号”船是我国唯一的专门从事国际海底区域资源勘查研究开发的综合性远洋科学考察船。该船于2002年进行了高起点的增改装工程，其中最重要的内容之一便是增设动力定位系统。本文介绍了在增改装设计过程中对若干重大问题的考试及部分主要的实船装置。     

190 m以下箱形驳总纵强度规范研究

针对目前超尺度箱形驳需要通过直接计算进行总强度校核的要求,采用有限元方法,基于船体梁理论,通过研究不同舱壁设置时,甲板和船底参与总纵强度的有效性,提出了保证超尺度箱形驳按规范进行设计的总强度附加要求,即对不同尺度比的箱形驳设置最低数量的水密舱壁来保证超尺度箱形驳的总强度,从而避免进行复杂的全船直接计算.     

船体分段装配的三维建模与动画设计实例介绍

船体分段构件装配过程的三维动画演示的目的是要从各个方位展示出该分段的结构特点,要求完成各构件的建模及大小分段的组装等一系列动画过程。动画过程中,构件的种类较为繁杂,该文只对典型的动画制作过程作系统介绍。     

特征驱动的T样条船体曲面参数化设计方法研究

为提高船体曲面生成和修改的便捷性、灵活性,提高船型优化设计效率,并且克服NURBS曲面表征船体曲面的一些不足,提出一种基于T样条技术的船体曲面参数化设计方法.将船体曲面特征参数分为全局、船首、船中和船尾4组,依据这些参数建立T样条控制网格,用单一的T样条曲面即可完成船体曲面和局部特征造型,大大减少了控制点数量.通过特征参数直接驱动船体曲面调整,使船型修改变得直观和简便,且更具有针对性.以典型水面舰船船体曲面表征为例,说明所提方法在船体曲面造型及修改方面的能力和优势,该方法可大大提高船型优化设计效率,具有较大的理论意义和实用价值.     

参数化的船型设计方法

根据特征参数和特征线,生成光顺的船体线型是造船工作者梦寐以求的目标。基于光顺曲线的参数化设计,提出了参数化的船型设计方法。该方法可根据特征参数和特征线快速开发出具有优秀航行性能的、光顺的船舶型线。设计实例表明了该设计方法的可行性。     

Test of extensively damaged hybrid ship hull

A hybrid ship hull model made with a steel truss and composite sandwich panels was tested and analyzed with the goal of gaining insight into how well this structural concept holds up after major damage. One of the ideas of the concept was to mount the sandwich panels to the steel truss such that they can be blown out in a controlled fashion to ventilate a large internal blast. The hull should be designed to have sufficient strength for the ship to reach a port safely even after such extensive damage. A 6-m model of such a hybrid ship hull, consisting of a stainless steel truss and 60 composite sandwich panels, was manufactured and mechanically tested. A number of panels were then removed one by one and the hull was retested to the design load after each panel had been removed. The removed panels simulated major damage. After nine panels had been removed, from all the different areas of the hull, it could still carry the design load, although with considerable nonreversible deformations of the hull girder. The hull was eventually loaded to final failure, which occurred at 25% above the design load.     

19100DWT多用途船结构设计概述

阐述了19100DWT大开口多用途重吊船的结构设计流程,通过对船体结构设计的若干问题的简要分析,指出了开展结构设计需要引起注意的方面。     

内倾船型的非线性横摇仿真分析

为解决内倾船型的非线性横摇工程分析问题,以内倾船型为对象,基于横摇、纵摇和升沉相互独立的假设,以线性耐波性计算软件预报的响应函数为基础,开发能计入船舶横倾过程中复原力臂的非线性因素对耐波性影响的预报软件,该软件可用于确定不同船型方案的非线性横摇时历曲线.采用该软件完成内倾船型与常规船型之间非线性横摇的差异对比,提出内倾船型在设计中需注意的地方：在设计过程中宜综合考虑内倾幅度与运动之间的影响后再确定内倾程度;采取措施减少内倾船型的纵摇幅值可在一定程度上减少内倾船型的横摇.     

基于设计特征的FRIENDSHIP船型参数化方法及实现

船型设计是船舶总体设计中一项极其复杂且又重要的内容,船舶的结构设计、性能计算、总布置等都要以船型为依据,因此,如何实现船型参数化设计尤为重要。FRIENDSHIP系统为船型设计提供了基于Feature特征和仿真驱动设计的参数化方法和实现机制。在对船型参数化基本理论———特征参数、特征曲线和曲面生成等进行详细阐述的基础上,以某型船艉部裸船体为例,具体阐述了船型参数化的实现流程,以及以Feature、Curveengine和Meta surface为特征机制的船型参数化的具体步骤。以Feature特征为核心的船型参数化方法不仅能为船型曲面的快速建立提供技术支撑,还可以为性能分析和优化提供基础条件。     

Research and development of a digital design system for hull structures

Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.     

A study on TLP hull sizing by utilizing optimization algorithm

This paper reports a study on hull sizing for tension leg platforms (TLPs) using an optimization model. At the conceptual or basic design stage of an offshore platform project, hull sizing is one of the most important tasks, having a great impact on later stages of the project. Hull sizing is usually done by an engineering team combining several disciplines and taking account of factors including hydrodynamics, global performance, stability, and structure. This makes it difficult and time-consuming to optimize the hull dimensions. In this study, hull sizing was modeled as an optimization problem in which a range of design criteria had to be satisfied and an objective function minimized. Sizing was then performed using optimization algorithms. For each module, the result calculated by our method was compared with that produced by commercial software (DNV Sesam). Our system was tested for conventional TLP design in three specific metocean environments. Finally, our optimized hull shape was compared with an existing TLP, and the difference in hull shape demanded by each environment was analyzed.