生产中心制造船模式的研究与应用

从造船业的特点及我国造船业的现状出发，在吸取国际造船业先进技术和经验的基础上，提出并确立了适于现代化造船的模式——生产中心制造船模式。分析、探讨此造船模式的结构、特点和运作方式。基于生产中心制造船模式的工程分解在于理顺作业任务包特征的相似性，以达到区域的专业化生产。模式的供应链是实现总装化造船的保证，造船信息化工程是运作生产中心制造船模式的支撑，为取得系统的平衡和控制必需建立动态和有效的计划体系。文中引入相似性理论分析产品导向型作业分解，提出了优化排坞计划的动态模拟优化方法和优化壳舾涂一体化计划的改进后的遗传算法。本文研究的成果已经在外高桥造船公司得到了初步实践。     

深化造船生产设计的几个有利因素探讨

本文从船厂转换造船模式、缩短造船周期、强化生产管理、方便现场施工等角度，重点探讨了深化造船生产设计的几个有利因素。     

基于数字化造船的生产设计方法研究

分析了传统船舶设计基本特征,结合数字化造船设计特点和实施数字化造船生产设计实践,提出了基于数字化造船为基本特征的船舶生产设计体系,以此为基础进一步探讨数字化生产设计中标准体系的需求和标准体系的构建,研究探讨规范数字化造船生产设计体系。     

基于约束理论的物量分析在工艺流程设计中的应用

本文探讨造船企业生产物流的分析计算思路，提出了基于约束理论的物量分析模式，用于在造船工程管理的复杂应用环境下，计算船体车间关键设备的生产物流，对船体车间进行主要设备的能力校核，通过能力负荷计算结合企业VAT分类方法，在工艺流程／工序的层级上。寻找出生产系统的瓶颈，从而对船体车间工艺流程设计进行优化。     

造船企业生产物流的组织

介绍了造船企业生产物流的概念，分析了造船企业生产物流的特征，提出了合理组织造船企业生产物流的基本原则。从空间、时间以及人员三方面阐述了现代造船模式下的造船企业生产物流系统的组织形式。     

转变观念 推进造船生产精细化管理

“精细化管理”是目前国内管理界普遍重视和讨论的一个热点课题，也是中国造船企业正在努力推进的工作。本文依据船厂造船生产部门的具体管理实践，探讨了造船生产精细化管理的一些问题和工作方法，是对作者所在企业推进现代造船模式和企业文化建设等相关工作进行的阶段性总结。     

CO2半自动单面焊柱状气孔产生原因初探

在陶质衬垫ＣＯ２气体保护单面焊工艺中，打底层焊缝中出现的沿焊缝柱状晶结晶方向的柱状气孔，严重影响着焊接质量。通过与生产条件相似的模拟试验，取得与生产中相同的柱状气孔实样，对其进行了宏观及微观分析，探讨了产生这种气孔的主要原因及对策。     

造船企业的发展和生产能力评估研究

通过对造船企业发展状况的介绍,分析了造船企业的生产能力的关键要素;提出了模糊综合评价法进行造船企业生产能力评估的步骤和准则,并结合专家打分法,为造船企业生产能力度量探讨了一种可行的量化方法。     

推进分段总组 缩短船台周期

本文就目前推进分段总组造船来缩短船舶在船台的建造周期的意义作了简单的陈述，同时从推进分段总组造船来改进船舶生产建造流程、固化船台分段合拢的现代造船模式进行了探讨。     

企业生产经营计划管理软件的开发与应用

从造船计划管理概念出发，分析了目前在国内外造船计划管理的现状，并着重就企业生产经营计划管理系统功能、软件系统实现的基础以及系统的特色进行了阐述。     

双体船阻力计算网格的探讨(英文)

In order to get some useful parameters for grid generation of catamaran, the CFD software FLUENT is used to investigate the main effects of grid generation on flow field calculation. The influences of some elements are investigated with a series of calculations in the present paper, and some alteratives are proposed. The proposed alteratives based on the analysis of the effects are used for a catamaran resistance calculation, comparisons of the calculated results with experimental data show good agreement. It shows that the research result of this paper is useful for the numerical calculation of catamaran.     

Development of a finite element modeling system for ship structures

In ship structural design, many structural analyses by the finite element method are carried out on models at several different scale levels; for example, a whole ship, cargo hold parts, and detailed structures. However, one serious problem with this design and analysis process is that the generation of the finite element models for a complex configuration is very difficult and laborious. To overcome this problem, an object oriented, finite element modeling system, MODIFY, has been developed by the authors. In this paper, the concept of the finite element modeling system and the techniques for the construction of the system are explained. First, the object oriented data structure of the system, based on the Part-Object concept, is proposed. In this concept, not only the geometry of the domain but also the analytical conditions, such as boundary conditions and material properties, and the finite element model, are represented by the object oriented data structure. By using this data structure, effective finite element model generation can be expected. Second, a mesh generation algorithm based on the frontal method is described. The original frontal method by S.H. Lo was improved for application to three-dimensional curved surfaces. A new inner node placement technique to make quadrilateral elements around stress concentrated areas is also proposed. These techniques are suitable for ship structures, and more accurate results from the finite element analysis can be expected. Moreover, the parallel mesh generation is implemented in MODIFY by using the client-server concept to accelerate mesh generation. Third, a prototype system for the automatic finite element model generation for different analysis levels is proposed. The system is based on the concept of the PD part, which is the part in the design and production stage, and automatic computing of the intersection between PD parts. The validity of this system is demonstrated by some examples.     

冷却水套的缩松缺陷分析及解决措施

针对冷却水套的缩松缺陷形成机理进行了初步分析,提出了解决缩松缺陷的工艺思路及工艺措施,并进行了生产验证.     

氧化铁皮对CO2半自动单面焊气孔倾向的影响

本文就坡口上的氧化铁皮对ＣＯ_２半自动陶质衬垫单面焊气孔倾向的影响进行了试验研究,利用Ｘ射线检测、ＯＭ、ＳＥＭ、ＥＤＸ和ＸＲＤ等方法对焊道进行了宏观及徽观分析。结果表明,氧化铁皮主要由Ｆｅ_３Ｏ_４、Ｆｅ_２Ｏ_３和ＦｅＯ组成,并参与反应生成ＣＯ气体;打底层焊缝中形成大量夹杂物易于气泡的形核;陶质衬垫的保温作用使打底层焊道上部先于底部结晶,气泡不易逸出而形成气孔。本文还探讨了防止气孔产生的措施。     

不同开孔率混凝土护面板上波浪打击力试验研究

波浪荷载是斜坡堤上混凝土护面板防浪特性的主要研究内容之一。通过物理模型试验,采用不规则波浪作用,对透水斜坡上不同开孔率混凝土面板受到的波浪打击力进行研究,分析了打击力1%值和1/3值随各影响因素的变化特性,提出了包含开孔率影响的单坡上波浪最大打击力计算方法,给出了波浪打击力的统计分布规律。     

尺度适应性二代小波的图像去噪方法

根据二代小波变换的基本理论和特点,研究二代小波对图像去噪的效果。提出基于二代小波的尺度适应性分解算法,并使用改进阈值函数进行阈值分析后再对噪声图像进行去噪处理。实验结果证明,使用尺度适应性二代小波对图像去噪比其他方法具有更好的效果,去噪后的图像信噪比大大提高。     

TK-2DC软件前处理模块-贴体正交网格生成软件开发

贴体正交网格计算方法是通过坐标变换或坐标投影,把不规则物理区域进行离散以生成规则矩形计算区域的方法,所生成网格的疏密性和正交性对于保证数值计算精度至关重要。目前最常用的3种贴体正交网格计算方法是代数网格生成法、椭圆型方程网格生成法以及保角变换网格生成法。为了保证网格的正交性,简化网格计算量,所采用的贴体正交网格计算方法是上述3种方法的组合体,并且以该法为内核,开发了简单易学的贴体正交网格可视化计算软件,该软件可以与CAD进行无缝连接,大大缩短了数值模拟前期研究工作的时间。     

多排槽式防波堤的水动力性能（英文）

This study examines the hydrodynamic performance of multiple-row vertical slotted breakwaters. We developed a mathematical model based on an eigenfunction expansion method and a least squares technique for Stokes second-order waves. The numerical results obtained for limiting cases of double-row and triple-row walls are in good agreement with results of previous studies and experimental results. Comparisons with experimental measurements of the reflection, transmission, and dissipation coefficients(CR, CT, and CE) for double-row walls show that the proposed mathematical model adequately reproduces most of the important features. We found that for double-row walls, the CR increases with increasing wave number, kd, and with a decreasing permeable wall part, dm. The CT follows the opposite trend. The CE slowly increases with an increasing kd for lower kd values, reaches a maximum, and then decreases again. In addition, an increasing porosity of dm would significantly decrease the CR, while increasing the CT. At lower values of kd, a decreasing porosity increases the CE, but for high values of kd, a decreasing porosity reduces the CE. The numerical results indicate that, for triple-row walls, the effect of the arrangement of the chamber widths on hydrodynamic characteristics is not significant, except when kd0.5.Double-row slotted breakwaters may exhibit a good wave-absorbing performance at kd0.5, where by the horizontal wave force may be smaller than that of a single wall. On the other hand, the difference between double-row and triple-row vertical slotted breakwaters is marginal.     

丝-粉电弧喷涂Cu-Sn复合涂层孔隙率的研究

介绍丝-粉电弧喷涂Cu-Sn复合涂层孔隙率的测试方法，分析了丝-粉电弧喷涂工艺规范对Cu-Sn复合涂层孔隙率的影响。     

An experimental study of wave-in-deck loading and its dependence on the properties of the topside structure

This paper concerns the largest and arguably the most threatening wave loading component experienced by a broad range of offshore structures. It arises when an incident wave crest exceeds the elevation of the underside of the deck structure, leading to direct wave-in-deck (WID) loading. The extent of this loading may be limited to the partial submergence of some of the lowermost deck beams, or could involve the large-scale inundation of the entire deck area. Either way, very large loads can arise which must be taken into account when assessing the reliability of the structure. In an earlier contribution Ma and Swan (2020) provided an extensive laboratory study exploring the variation of these loads with the properties of the incident wave. The present paper describes a second stage of this experimental study in which the variation of the WID loads with the properties of the topside structure is addressed. Specifically, it considers the porosity, position and orientation of the topside relative to the incident wave conditions, and seeks to explore both the variations in the maximum load and the loading time–history resulting from these changes.Given the highly transitory nature of a WID loading event, coupled with the fact that the problem is governed by flow conditions at, or very close to, the instantaneous water surface, the loading process is driven by an exchange of momentum from the wave crest to the topside structure. A recently developed WID load model, based on exactly these arguments (Ma and Swan 2020), is used alongside the laboratory data to provide a break-down of the load into its component parts. This provides an enhanced physical understanding of the resulting load time–history. The first part of the study is based upon an idealised generic topside structure, allowing a systematic variation in key parameters, particularly porosity. The second part addresses a realistic topside structure demonstrating the practical relevance of earlier work. Taken together, the analysis clearly establishes the importance of the topside porosity, clarifies the spatial effects associated with the evolution of a large ocean wave beneath the plan area of a structure and explains the unexpected occurrence of impact-type loading on topside structures having a high porosity. Most importantly, the paper highlights those properties of a topside structure which must be incorporated if the WID loads are to be accurately predicted.