自升式钻井平台钻台挡风墙结构优化与分析

介绍钻台挡风墙结构的设计方法,并通过改变结构布局、优化材料选型和连接形式,有效减轻结构自重、缩减工时。钻台挡风墙结构主要考虑静载、拖航、正常作业和风暴自存等4组工况,利用SACS软件对钻台挡风墙结构进行建模、分析及后处理,并根据ABS MODU规范对结构进行强度校核。分析结果表明:优化后的钻台挡风墙结构具有足够的强度和刚度,满足规范要求。     

Research on numerical wave tank based on the improved moving-particle semi-implicit method with large eddy simulation

Moving-particle semi-implicit （MPS） method is a new mesh-free numerical method based on Lagrangian particle. In this paper, MPS method is applied to the study on numerical wave tank. For the purpose of simulating numerical wave, we combine the MPS method with large eddy simulation （LES） which can simulate the turbulence in the flow. The intense pressure fluctuation is a significant shortcoming in MPS method. So, we improve the original MPS method by using a new pressure Poisson equation to ease the pressure fluctuation. Divergence- free condition representing fluid incompressible is used to calculate pressure smoothly. Then, area-time average technique is used to deal with the calculation. With these improvements, the modified MPS-LES method is applied to the simulation of numerical wave. As a contrast, we also use the original MPS-LES method to simulate the wave in a numerical wave tank. The result show＇s that the new method is better than the original MPS-LES method.     

基于网络的GMDSS模拟软件设计与实现

针对仿真软件的特点,介绍了GMDSS系统组成和功能、模块分解和系统设计．基于C／S模式,详细分析了GMDSS的软件设计模型和网络通信中的数据交换算法,实现了教练员端（岸站）和客户端（船站）的实时仿真,在局域网内完成了船台与岸台以及卫通船站与岸站的模拟操作．     

对埋地金属管道外防腐的几点认识

简要介绍了大庆油田埋地管道腐蚀和防腐材料现状,对埋地管道外腐蚀原因并针对外防腐结构外选材的不合理性,更新改造工程的“以换代修”等问题进行了分析,为提高埋地管道外防腐工程质量,建议根据管道工程实际条件,对外防腐方案进行了分的技术经济论证,并应尽快制定旧管道更换和维修标准及界限,加强长输管道外防腐的几评价等工作。     

车载LNG气瓶振动试验常见失效形式分析及控制措施

文章介绍了车载LNG气瓶振动试验要求,总结了振动试验过程常见的几种失效形式,通过原因分析,给出了设计、制造和试验过程的注意事项和预防措施。