滚柱式超越离合器设计及动力学仿真分析

以某循环水泵机组超越离合器为研究对象，通过仿真分析其接触状态及受力变形，完成结构强度设计、改善接触应力及变化特性，获得高性能滚柱式超越离合器结构；通过ADAMS虚拟样机软件对滚柱式超越离合器的楔合过程和超越脱开过程进行动力学仿真，获得离合器动态性能参数；通过试验研究离合器空转力矩、空转角等性能。采用将有限元分析与台架试验相结合的方法，缩短离合器结构的选配过程和测试周期，提高试验结果的可靠性。     

超越离合器和连杆机构组合应用的研究

本文阐述了超越离合器和连杆机构组合应用的主要机构型式及其运动特点，探讨了这类机构的设计方法。     

超越离合器的力学分析

全面分析了内星轮滚柱式超越离合器工作时４个阶段的力学特点,并对各主要影响因素进行了讨论。指出,滚子惯性、滚动摩擦系数以及压紧弹簧力学对离合器的性能有重要作用,在分析中不能忽略。     

船用摩擦离合器动态温度场与应力场的计算

现代船用摩擦离合器设计时,不仅要进行静态设计,以满足传递最大扭矩的要求,而且应该进行动态设计,控制热负荷所引起的温升和应力在许用范围内。本文以干式锥形高弹性摩擦离合器为例,根据热弹性理论和有限差分原理,对船用摩擦离合器接合过程的动态温度场和应力场计算提出了一种方法,为离合器动态设计提供条件。一、离合器摩擦表面温度与外锥体温度场 1.不稳定导热过程离合器滑摩产生的热量使摩擦付表面温度升高,继而传到整个摩擦付     

国产滑差离合器及控制系统在拖船上的应用

针对半滑差离合器在船舶上的应用多为进口系统且滑差系统后期应用成本及维护成本高等问题，提出了用国产离合器及国产控制系统方案。该方案采用国产摩擦片、国产阀件及国产控制器，通过研究国产半滑差式离合器液压及电气控制系统原理、工作方式，总结了实船应用中的常见故障并找出解决方法。实船应用表明：已交付的2艘使用国产滑差离合器的拖船，其滑差控制系统稳定可靠，可大幅度降低使用维护成本。     

某型艇气胎离合器绝缘处理及调试

<正>气胎离合器的接合与脱开信号是通过电信号装置来传输,其电气绝缘低时,直接影响电信号输出,导致信号指示不正常,造成误判,严重时导致气胎离合器烧坏,所以气胎离合器的安全、稳定直接影响着舰艇的航行。1气胎离合器绝缘低处理方法1)检测气胎离合器系统绝缘值,用250 VMΩ绝缘检测表进行绝缘值的检测,当绝缘值小于0.5MΩ时作好记录,并做好修理前准备。2)首先排除外部导致绝缘低的各种因素,如     

高速轴离合器失效分析与改进措施研究

为解决某自升式海洋辅助平台主推进装置离合器失效的问题,通过对某离合器进行系统研究和分析,确认失效的主要原因是原气动离合器的径向配气机构对环境因素较为敏感、密封可靠性较差。在分析失效原因后,将离合器的径向配气机构修改为浮动配油机构,同时将气动离合器优化改进为液压离合器。试验与应用表明:改进后的高速轴液压离合器工作稳定可靠。     

浅谈挖泥船离合器的维护保养

船用离合器广泛应用于挖泥船的各种传动系统,本文对挖泥船用液压离合器和气胎离合器的工作原理、结构特点、维护保养、应急操作做了深入的分析探讨,对挖泥船离合器的维护保养有一定的现实指导和借鉴意义。     

柴燃并车试验台齿轮箱动态仿真与实验

以带同步超越离合器的并车齿轮箱传动系统的研究对象，讨论系统动力学模型，用模态分析法与状态空间法，对多自由度时变非线性方程组求解，利用所建的动态分析仿真模型，分别对柴或燃运行方式的斜齿柱齿轮传动系统动态仿真得出结果与实验结果相近，对柴燃联合动力装置切换点选择和数字仿真模型的确立有参考价值。     

大功率摩擦同步离合器参数化设计及仿真分析系统

以大功率摩擦同步离合器为研究对象,以建立参数化设计和仿真分析集成系统平台为目标,阐述了一种利用VC++6.0作为开发工具,融合基于Pro/E的离合器参数化设计流程、基于ADAMS动力学仿真分析方法及基于MARC有限元分析方法等的集成系统设计原理、程序流程及系统实现的关键技术。该系统采用面向对象的思想开发,流程清晰,界面友好,操作方便,较好地整合和实现了大功率摩擦同步离合器的现代设计方法。应用该系统可大幅提高该离合器设计质量和设计效率。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

正~~     

第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。