共查询到20条相似文献，搜索用时 46 毫秒
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船舶行业特殊的用工模式,使劳资纠纷日益突出.纠纷的多发性、群体性、解决难度大、非诉讼告状是当前船舶修造行业劳资纠纷的主要特点.外包队克扣或者拖欠劳动者的工资、外包队与劳动者工资价位约定不明确、外包队在支付工资时不合理扣除相关费用、用人单位招聘手续不规范、承包人因经营能力不足和管理不善等因素导致工程亏损、承包人无力承担劳动者工资或者预领工程款后逃匿等是产生劳资纠纷的重要原因.建立纠纷的预防机制、调解机制、监管机制及畅通劳动者诉求机制等解决劳资纠纷多元机制,是避免和减少劳资纠纷,构建和谐劳动关系,促进舟山船舶修造业健康发展的重要因素. 相似文献
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志愿船观测是我国必须履行的国际义务.目前,我国海洋志愿观测船只呈逐年减少趋势,从过去的百余艘船只降至三、四十艘,并且从观测能力上也存在较多问题,比如观测手段比较落后、观测要素单一、观测资料缺乏.从根本上讲,志愿船运行机制缺乏有效的制度化保障,因此难以形成业务化能力.为解决这一问题,本文对加强我国海洋志愿船观测事业发展提出一些对策建议,仅供参考. 相似文献
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Risk Based Optimal Inspection and Repair Planning for Ship Structures Subjected to Corrosion Deterioration 总被引：1，自引：1，他引：1
A framework of risk based inspection and repair planning was presented to optimize for the ship structures subjected to corrosion deterioration. The planning problem was formulated as an optimization problem where the expected lifetime costs were minimized with a eonstraint on the minimum aceeptable rehability index. The safety margins were established for the inspection events, the repair events and the failure events for ship struetures. Moreover, the formulae were derived to calculate failure probabihties and repair probabilities. Based on them, a component subjected to corrosion is investigated for illustration of the process of selecting the optimal inspection and repair strategy. Furthermore, some sensitivity studies were provided. The results show that the optimal inspection instants should take place before the reliability index reaches the minimum acceptable reliability index. The optimal target failure probability is 10^-3. In addition, a balance can be achieved between the risk cost and total expected inspection and repair costs by means of the risk-based optimal inspection and repair method, which is very effective in selecting the optimal inspection and repair strategy. 相似文献
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The nonlinear biased ship rolling motion and capsizing in random waves are studied by utilizing a global geometric method.Thompson's α-parameterized family of restoring functions is adopted in the vessel equation of motion for the representation of bias.To take into account the presence of randomness in the excitation and the response,a stochastic Melnikov method is developed and a mean-square criterion is obtained to provide an upper bound on the domain of the potential chaotic rolling motion.This criterion can be used to predict the qualitative nature of the invariant manifolds which represent the boundary between safe and unsafe initial conditions,and how these depend on system parameters of the specific ship model.Phase space transport theory and lobe dynamics are used to demonstrate how motions starting from initial conditions inside the regions bounded by the intersected manifolds will evolve and how unexpected capsizing can occur. 相似文献
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M.S.Seif M.Askari 《中国海洋工程》2004,18(3):477-484
The paper contains the results of an experimental study on a planing catamaran. The aim of this study is resistance reduction with application of foils. Experiments are performed in different conditions and the results are compared with each other. The foils are used in different configurations and it is concluded that unsuitable design may result in larger resistance. But, it is also shown that, for a good design, the resistance may be reduced considerably. 相似文献
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It is difficult to compute far-field waves in a relative large area by using one wave generation model when a large calculation domain is needed because of large dimensions of the waterway and long distance of the required computing points. Variation of waterway bathymetry and nonlinearity in the far field cannot be included in a ship fixed process either. A coupled method combining a wave generation model and wave propagation model is then used in this paper to simulate the wash waves generated by the passing ship. A NURBS-based higher order panel method is adopted as the stationary wave generation model; a wave spectrum method and Boussinesq-type equation wave model are used as the wave propagation model for the constant water depth condition and variable water depth condition, respectively. The waves calculated by the NURBS-based higher order panel method in the near field are used as the input for the wave spectrum method and the Boussinesq-type equation wave model to obtain the far-field waves. With this approach it is possible to simulate the ship wash waves including the effects of water depth and waterway bathymetry. Parts of the calculated results are validated experimentally, and the agreement is demonstrated. The effects of ship wash waves on the moored ship are discussed by using a diffraction theory method. The results indicate that the prediction of the ship induced waves by coupling models is feasible. 相似文献
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Zhang Furan Zhao Jun Zhang Xueqin Assistant Researcher Tianjin Research Institute of Water Transport Engineering Tianjin Assistant Engineer Tianjin Research Institute of Water Transport Engineering Tianjin 《中国海洋工程》1993,(2)
In respect of an offshore berthing pillar, the test study result of current force acting on mooring ships is described in this paper. Empirical and semi-empirical relationships of current force coefficient are given according to the angle between the flow direction and the ship's longitudinal axis, which are coincident with the result of theoretical analysis. 相似文献
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反水雷行业的进步与高性能船的发展紧密相关，详细介绍了国外多种类型高性能船在反水雷行业中的应用，通过分析各类高性能船的外形结构特点，对其在反水雷行业广泛应用的原因进行了说明。同时对比了空中平台、水面平台以及水下平台等主要反水雷作业平台的属性特点，结合高性能船目前复合化发展的趋势，认为未来高性能船的跨介质应用将会是反水雷行业的一个重要方向。 相似文献
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Bottom ventilated cavitation has been proven as a very effective drag reduction technology for river ships and planning boats. The ability of this technology to withstand the sea wave impact usual for seagoing ships depends on the ship bottom shape and could be enhanced by some active flow control devices. Therefore, there is the need in numerical tools to estimate the effects of bottom changes and to design such devices. The fundamentals of active flow control for the ship bottom ventilated cavitation are considered here on the basis of a special model of cavitating flows. This model takes into account the air compressibility in the cavity, as well as the multi-frequency nature of the incoming flow in wavy seas and of the cavity response on perturbations by incoming flow. The numerical method corresponding to this model was developed and widely manifested with an example of a ship model tested in a towing tank at Froude numbers between 0.4 and 0.7.The impact of waves in head seas and following seas on cavities has been studied in the range of wavelengths from 0.45 to 1.2 of the model (or ship) length. An oscillating cavitator-spoiler was considered as the flow controlling devices in this study. The oscillation magnitude and the phase shift between cavitator oscillation and the incoming waves have been varied to determine the best flow control parameters. The main results of the provided computational analysis include oscillations of cavity surface, of the pressure in cavity and of the moment of hydrodynamic load on the cavitator. The major part of computations has been carried out for the flap oscillating at the frequency coinciding with the wave frequency, but the effect of a frequency shift is also analyzed. 相似文献
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文章从船舶对海洋环境造成污染的主要物质:石油及其制品、散装有毒液体物质、包装有害物质、生活污水、船舶垃圾和有害排气等方面分析了船舶对海洋环境造成污染的途径,有针对性地提出了船舶防污染管理措施,以限制船舶污染物排放,保护海洋环境。 相似文献
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"依港管船"制度的提出是我国对渔船管理模式的探索和创新,也是贯彻落实党的十九大精神,推进海洋生态文明的重要举措。文章通过对"依港管船"制度内涵与外延的阐述,从"依港管船"制度的法理基础与现实需求角度入手,研究其合理性与必要性。并且对国外港口建设与船舶管理制度进行分析,总结出目前日本、美国、韩国、德国等国家实施"依港管船"制度的相似性及主要差异,为我国"依港管船"制度的完善与实施提供了参照。并给出了完善"依港管船"以及"渔港生态"立法;明晰渔港产权制度;强化渔船管理制度建设;建立主管部门驻港管理机制;实行部门执法联动等对策建议。 相似文献
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中国海洋志愿观测船现运行状态及发展 总被引：1，自引：0，他引：1
刘家沂 《海洋通报(英文版)》2009,11(1):90-96
志愿船观测是中国必须履行的国际义务。目前，中国海洋志愿观测船只呈逐年减少趋势，从过去的百余艘船只降至三、四十艘，并且从观测能力上也存在较多问题，比如观测手段比较落后、观测要素单一、观测资料缺乏。从根本上讲，志愿船运行机制缺乏有效的制度化保障，因此难以形成业务化能力，并且不能有效的履行国际义务。本文将对志愿船现运行状态及发展进行论述。 相似文献
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在Fudide-Krylov假设条件下,依据船舶分离建模理论在固定和运动坐标系中计算海面船只六自由度运动数学模型。主要包括:对风、浪、流的单独建模并进行矢量叠加,并在风浪流联合作用下对船舶六自由度运动构建简化的数学建模,完成实时仿真。基于Simulink和V-Realm Builder虚拟现实技术创建船舶运动模型、海洋表面环境及船只的几何模型,对船舶六自由度运动进行视景仿真,给出了有风无浪、有浪无风和风浪兼有三种情况下船只旋回路径和船舶运动轨迹。在VR视景浏览器中创建动态海面上船舶六自由度运动模型,不仅易于实现且结果逼真。得到的结果为进一步研究动态船只目标声散射特性的精确预报提供基础。 相似文献
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随着人类环保意识的增强,海洋环境保护已经成为经济全球化浪潮中令人关注的焦点。中国是一个航运大国,也是一个受到油污损害严重的国家,尽快建立我国船舶油污损害赔偿机制,已成为最近几年船舶防污染工作中的重要议题。本文以船舶油污损害赔偿法律机制为对象,研究了国内涉及到有关油污损害赔偿的立法历程和发展趋势,并就我国船舶油污损害赔偿机制的建立进行分析。 相似文献