船舶综合电力系统仿真研究

基于船舶综合电力系统仿真主题,开展了包括建模与系统仿真在内的分析与研究,利用Matlab/Simulink仿真平台搭建了船舶综合电力系统的仿真模型并开展相关的系统集成技术分析。     

基于OpenGL的鱼雷弹道显示研究与实现

文章阐述了鱼雷弹道显示系统设计与实现,并创建了鱼雷的3D模型和仿真环境,构造了逼真的3D视景显示和3D立体声响,使弹道以形象、直观的形式表现在研究者面前,以方便科研人员对鱼雷弹道进行分析与研究。鱼雷弹道显示系统采用VisualC＋＋6．0＋3DSMaxq-OpenGL模拟鱼雷在海上的主要场景,给出了鱼雷运动状态的弹道轨迹,并在计算机上成功地完成了鱼雷运动的视景仿真。     

某舰载伺服系统位置控制器设计与仿真研究

基于某舰载伺服系统的仿真模型对系统位置控制器设计了模糊自整定PID＋输入前馈控制等四种控制算法,在MATLAB／SIMULINK环境下进行了仿真比较分析。仿真结果表明,模糊自整定PID＋输入前馈控制可获得更优的控制效果。     

固体氧化物燃料电池船舶动力系统的动态仿真(英文)

Solid oxide fuel cell (SOFC) has been identified as an effective and clean alternative choice for marine power system. This paper emphasizes on the dynamic modeling of SOFC power system and its performance based upon marine operating circumstance. A SOFC power system model has been provided considering thermodynamic and electrochemical reaction mechanism. Subcomponents of lithium ion battery, power conditioning unit, stack structure and controller are integrated in the model. The dynamic response of the system is identified according to the inertia of its subcomponent and controller. Validation of the whole system simulation at steady state and transit period are presented, concerning the effects of thermo inertia, control strategy and seagoing environment. The simulation results show reasonable accuracy compare with lab test. The models can be used to predict performance of a SOFC power system and identify the system response when part of the component parameter is adjusted.     

水火弯板残余变形预报的数值和量纲分析(英文)

Line heating process is a very complex phenomenon as a variety of factors affects the amount of residual deformations. Numerical thermal and mechanical analysis of line heating for prediction of residual deformation is time consuming. In the present work dimensional analysis has been presented to obtain a new relationship between input parameters and resulting residual deformations during line heating process. The temperature distribution and residual deformations for 6 mm, 8 mm, 10 mm and 12 mm thick steel plates were numerically estimated and compared with experimental and published results. Extensive data generated through a validated FE model were used to find co-relationship between the input parameters and the resulting residual deformation by multiple regression analysis. The results obtained from the deformation equations developed in this work compared well with those of the FE analysis with a drop in the computation time in the order of 100 (computational time required for FE analysis is around 7 200 second to 9 000 seconds and where the time required for getting the residual deformation by developed equations is only 60 to 90 seconds).     

集装箱货运仿真模型在珠三角港港口投资方案评估(英文)

In the Pearl River Delta (PRD), there is severe competition between container ports, particularly those in Hong Kong, Shenzhen, and Guangzhou, for collecting international maritime container cargo. In addition, the second phase of the Nansha terminal in Guangzhou’s port and the first phase of the Da Chang Bay container terminal in Shenzhen opened last year. Under these circumstances, there is an increasing need to quantitatively measure the impact these infrastructure investments have on regional cargo flows. The analysis should include the effects of container terminal construction, berth deepening, and access road construction. The authors have been developing a model for international cargo simulation (MICS) which can simulate the movement of cargo. The volume of origin-destination (OD) container cargo in the East Asian region was used as an input, in order to evaluate the effects of international freight transportation policies. This paper focuses on the PRD area and, by incorporating a more detailed network, evaluates the impact of several infrastructure investment projects on freight movement.     

氨基乙酸在A3钢表面的吸附行为研究

利用极化曲线法和交流阻抗技术研究了NaHCO3溶液中氨基乙酸(GLY)在A3钢表面的吸附行为及其对A3钢腐蚀行为的影响.结果表明:GLY在试样表面形成了多层吸附,且存在脱附过程,其缓蚀机理为"几何覆盖效应",其浓度为100 mg/L时具有较好的缓蚀效果.     

基于三维光学扫描的发动机气管质量检测方法

发动机气管产品设计初期,须制造产品样机验证设计方案.在无检具的情况下,常规检测设备无法实现产品检测.利用三维光学扫描设备结合检测软件,采集产品点云数据、点云杂点噪点数据处理、产品模型与点云数据基准对齐、尺寸分析可实现产品制造质量检测.通过具体样件检测验证分析,找出了同批次产品装配干涉问题点,为产品后续改进提供了数据参考...     

船舶三维数字化设计研究

对船舶三维设计方法及技术进行了研究,阐述了基于CATIA的船舶三维设计具体设计流程和方法,并结合3100TEU集装箱船具体实例,探讨了船舶三维设计方法和一般步骤.该研究对船舶三维设计系统的开发有一定参考价值。     

基于NAPA的船舶结构设计方法研究

以NAPA软件为平台,以某散货船为例,通过对一般构件、肘板、开口的表格化建模方法、图形输出方法和剖面特性输出方法的研究,将三维设计概念引入到船舶结构设计中,进一步阐述了现代结构设计方法,并与传统结构设计方法相比较,发现结构设计效率大大提高。