散装货船模糊综合安全性评估的实现方法

基于模糊数学的理论,将模糊多级综合评判方法运用于散装货船的综合性评估。通过综合分析与模糊化处理影响散装货船安全笥的船舶、船员及环境三方面的各种因素,建立了模糊综合安全性评估的数学库和计算机程序。     

船舶气囊下水工艺实践与发展前景

本文叙述船舶气囊下水新工艺在我国内河中、小型船厂近年来的实践，提出和总结气囊下水工艺有关计算方法和注意事项。鉴于气囊下水新工艺有其独特的优越性，并随着气囊制造质量和下水工艺不断完善提高，气囊下水新工艺必会有较好的发展前景，下水船舶重量期望可提高到2000t。     

CJBW10舰船微机监控报警系统

介绍一种新型的舰船用微机监控报警系统，该系统采用先进的微机网络技术和单片机技术，将高分辩率彩色ＣＲＴ测点参数和图形显示功能，报警灯板板功能和记录打印功能以及控制功能集于一块单板上，并通过网络与测量单元相闻，既可在网络型船舶自动化系统中作这联网的机舱监控报     

自主水下航行器制导系统的设计

简要介绍了某小型远程自主水下航行器制导系统的设计要求和软硬件实现方法,该制导系统已成功应用于211工程建设的自主水下航行器上。     

小水线面双体船结构优化

本文对小水线面双体船结构优化设计方法进行了研究。以-570t外倾式小水线面双体船为结构优化对象,根据劳氏船级社特种船舶入级规范中的有关要求作为其约束条件,利用混合离散变量优化方法(MDOD法)对该船进行了结构优化设计。     

Evaluation of added resistance in regular incident waves by computational fluid dynamics motion simulation using an overlapping grid system

A computational fluid dynamics simulation method called WISDAM-X was developed to evaluate the added resistance of ships in waves. The Reynolds-averaged Navier–Stokes (RANS) equation was solved by the finite-volume method and a MAC-type solution algorithm. An overlapping grid system was employed to implement rigorous wave generation, the interactions of ships with incident waves, and the resultant ship motions. The motion of the ship is simultaneously solved by combining the solution of the motion of the ship with the solution of the flow about the ship. The free surface is captured by treatment by the density-function method. The accuracy of WISDAM-X is examined by a comparison with experimental data from a container carrier hull form, and shows a fairly good agreement with respect to ship motion and added resistance. Simulations were also conducted for a bow-form series of a medium-speed tanker to examine the effectiveness of the WISDAM-X method as a design tool for a hull form with a smaller resistance in waves. It was confirmed that the WISDAM-X method can evaluate the added resistance with sufficient relative accuracy and can be used as a design tool for ships.     

PIV velocity field measurements of flow around a KRISO 3600TEU container ship model

The main purpose of this investigation was to demonstrate a useful application of the particle image velocimetry (PIV) method to analyze the complex flow characteristics around a ship. For a sample illustration, the KRISO 3600TEU container ship model was chosen. The flow structure in the stern and near-wake region of the model has been investigated experimentally in a circulating water channel. Instantaneous velocity fields measured by the PIV velocity field measurement technique have been ensemble-averaged to give details of flow structures such as the spatial distributions of the local mean velocity, vorticity, and turbulent kinetic energy. The free-stream velocity was fixed at U _o = 0.6m/s, and the corresponding Reynolds number based on the length between perpendiculars was about 9.0 × 10⁵. The container ship model shows a complicated three-dimensional flow structure in the stern and near-wake regions. The PIV results clearly revealed the formation of large-scale bilge vortices in the stern region and their effect on the flow in the near-wake. The results shown here provide valuable information for hull form design and the validation of viscous ship flow codes and of turbulence models.     

海浪统计资料对船舶波浪弯矩设计值的影响

对船舶,特别是超规范船舶,进行结构的直接计算设计时,首先要知道波浪弯矩设计值。 要确切地做到这一点,设计人员应合理地选择船舶航行海域的海浪长期统计资料,然后根据船 舶的装载工况和实际可能达到的航速,借用线性理论或非线性理论进行波浪弯矩的长期预报 来确定设计值。本文就一艘大型集装箱船舶,按五个典型海域的海浪统计资料,对波浪弯矩及 波浪合成弯矩作了长期预报计算,并与 ＩＡＣＳ的统一纵强度要求ＵＲ—Ｓ１１的结果作了比较和 分析,给出了对船舶结构直接计算设计有指导意义的几点结论。     

基于STEP应用协议—船舶管系（AP217）实施方法的研究

本文介绍了ＳＴＥＰ标准应用协议船舶管系（ＡＰ１２７）的基本框架及基于ＡＰ２１７的ＳＴＥＰ 文件前后处理器的设计原理,通过ＳＴＥＰ文件实现了三维管系图在 ＡｕｔｏＣＡＤ １２．０和 Ｐｒｏ／ ＥＮＧＩＮＥＥＲ两个不同ＣＡＤ系统之间的产品数据交换。     

神经网络在船舶操纵中的应用研究

该文对人工神经网络用于船舶操纵动态特性的在线学习进行了研究,并提出了基于神经网络预报的操舵控制算法。仿真试验的结果表明了该控制算法的有效性。