共查询到19条相似文献,搜索用时 218 毫秒
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ZHAN Yi-ting JI Zhuo-shang LIU Yin-dong 《船舶与海洋工程学报》2007,6(2):37-43
Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding. 相似文献
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A new multi-level analysis method of introducing the super-element modeling method, derived from the multi-level analysis method first proposed by O. F. Hughes, has been proposed in this paper to solve the problem of high time cost in adopting a rational-based optimal design method for ship structural design. Furthermore,the method was verified by its effective application in optimization of the mid-ship section of a container ship. A full 3-D FEM model of a ship,suffering static and quasi-static loads, was used as the analyzing object for evaluating the structural performance of the mid-ship module, including static strength and buckling performance. Research results reveal that this new method could substantially reduce the computational cost of the rational-based optimization problem without decreasing its accuracy, which increases the feasibility and economic efficiency of using a rational-based optimal design method in ship structural design. 相似文献
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Dimensional control is one of the most important challenges in the shipbuilding industry.In order to predict assembly dimensional variation in hull flat block construction,a variation stream model based on state space was presented in this paper which can be further applied to accuracy control in shipbuilding.Part accumulative error,locating error,and welding deformation were taken into consideration in this model,and variation propagation mechanisms and the accumulative rule in the assembly process were analyzed.Then,a model was developed to describe the variation propagation throughout the assembly process.Finally,an example of flat block construction from an actual shipyard was given.The result shows that this method is effective and useful. 相似文献
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TAN Zhi-yong MU Yong ZHENG Hong-tao 《船舶与海洋工程学报》2005,4(3):42-46
A finite-rate method is used to simulate the three-dimensional combustion process in a plasma generator with CH4 as the fuel. The simulation was run with RNG k-ε model to simulate turbulence, with eddy-dissipation-concept (EDC) model to simulate the combustion and with discrete ordinates model to simulate radiation. The numerical results show that the flow field characteristics and the parameter distributions are under the condition of rich fuels, and these results provide valuable information when optimizing the plasma generator design and organizing its flow fields. 相似文献
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A model of application system for man-machine-environment system engineering in vessels based on IDEF0 总被引:1,自引:0,他引:1
Applying man-machine-environment system engineering(MMESE)in vessels is a method to improve the effectiveness of the interaction between equipment, environment, and humans for the purpose of advancing operating efficiency, performance, safety, and habitability of a vessel and its subsystems. In the following research, the life cycle of vessels was divided into 9 phases, and 15 research subjects were also identified from among these phases. The 15 subjects were systemized, and then the man-machine-environment engineering system application model for vessels was developed using the ICAM definition method 0 (IDEF0), which is a systematical modeling method. This system model bridges the gap between the data and information flow of every two associated subjects with the major basic research methods and approaches included, which brings the formerly relatively independent subjects together as a whole. The application of this systematic model should facilitate the application of man-machine-environment system engineering in vessels, especially at the conceptual and embodiment design phases. The managers and designers can deal with detailed tasks quickly and efficiently while reducing repetitive work. 相似文献
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Prediction of Stabilization of Ship in Random Wave 总被引:1,自引:0,他引:1
ZHANG Hai-peng LAI Zhi-chang JIN Hong-zhang LI Guo-binAutomation College Harbin Engineering University Harbin China 《船舶与海洋工程学报》2002,1(1):69-72
In this paper we show thc method of energy in part with which we can get the model of random wave,and predict theroll motion of unstabilized ship and stabilized ship using the wave model.The control parameters of fin stabilizer are determinedaccording to the performance index. The simulation of the system is also made in this paper. The comparison of the simulationwith real ship indicates that the method can be used in the prediction of roll motion of a stabilized ship in random wave. 相似文献
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《舰船科学技术》2016,(6):52-56
Pointing at naval ship projects creation and evaluation at stage of naval ship concept design,in the mechanism of integrated design based on naval ship synthesis model, ship projects creation and intelligent fuzzy evaluation method is researched, thus the applicability of each algorithm is obtained. Firstly,the naval ship synthesis model is introduced to design process, value and application status of synthesis model in integrated design is then exposed. Then the applicability of single target and multi targets SA algorithm is improved, and the quick generation of naval ship projects is done. After that, multiple projects evaluation method based on Vague fuzzy set is introduced to established the intelligent evaluation model, which can integrate effectively the quantitative and qualitative indexes. At last, the analysis of results comparison shows the advancement and rationality of each method. The example shows the integrated design process researched in this paper can be a great orientation of naval ship project design, and can also be used in other parts of naval ship development. 相似文献
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LUShu-ping YANGXue-jing ZHAOXi-ren 《船舶与海洋工程学报》2004,3(1):20-23
As there are lots of non-linear systems in the real engineering, it is very important to do more researches on the modeling and prediction of non-llnear systems. Based on the muhi-resolution analysis (MRA) of wavelet theory, this paper combined the wavelet theory with neural network and established a MRA wavelet network with the scaling function and wavelet function as its neurons. From the analysis in the frequency domain, the results indicated that MRA wavelet network was better than other wavelet networks in the ability of approaching to the signals. An essential research was carried out on modeling and prediction with MRA wavelet network in the non-linear system. Using the lengthwise sway data received from the experiment of ship model, a model of offline prediction was estab lished and was applied to the short-time prediction of ship motion. The simulation results indicated that the forecasting model improved the prediction precision effectively, lengthened the forecasting time and had a better prediction results than that of AR linear model. The research indicates that it is feasible to use the MRA wavelet network in the short -time prediction of ship motion. 相似文献
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SHI Dong-yan YANG Jing-tong QIU Chang-hua XUE Kai 《船舶与海洋工程学报》2005,4(2):50-55
In this paper, in order to implement the share and exchange of the ship product data, a new kind of global function model is established. By researching on the development and trend of the application of ship STEP ( standard for the exchange of product model data) standards, the AIM (application interpreted model) of AP216 is developed and improved as an example, aiming at the characteristics and practical engineering of ship industry in our country. The data exchange interfaces are formed based on STEP in the CAD/CAM for the ship by all function modules and shared databases under the global function model. The share and exchange of all information and data are solved in the design, manufacture and all life-cycle of ship products among different computer application systems. The research work makes foundation for the ship industry informatization. 相似文献
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In considering the characteristic of a rudder,the maneuvers of a ship were described by an unmatched uncertain nonlinear mathematic model with unknown virtual control coefficient and parameter uncertainties.In order to solve the uncertainties in the ship heading control,specifically the controller singular and paramount re-estimation problem,a new multiple sliding-mode adaptive fuzzy control algorithm was proposed by combining Nussbaum gain technology,the approximation property of fuzzy logic systems,and a multiple sliding-mode control algorithm.Based on the Lyapunov function,it was proven in theory that the controller made all signals in the nonlinear system of unmatched uncertain ship motion uniformly bounded,with tracking errors converging to zero.Simulation results show that the demonstrated controller design can track a desired course fast and accurately.It also exhibits strong robustness peculiarity in relation to system uncertainties and disturbances. 相似文献
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依据基于模型定义(Model Based Definition,MBD)的船舶虚拟建造技术是对船舶设计技术的创新。通过选取液化天然气(Liquefied Natural Gas,LNG)船船体分段建造的重要工艺环节,基于统一的三维模型,根据船舶建造工艺流程,在实船建造前开展基于三维模型的虚拟仿真验证,动态分析船舶中间产品的可制造性以优化工艺设计,打通船舶产品设计(Ship Product Design,SPD)三维模型在三维完整性建模设计、虚拟仿真、生产中的数据链路,形成基于三维模型的产品设计、工艺设计和建造仿真技术方案,可有效降低现场返工率、提升船舶建造效率和质量。 相似文献
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针对船舶建造中的锚链筒设计物理状态下的拉锚试验,以某49000 DWT成品油轮为研究对象,对其进行拉锚试验仿真,验证仿真系统的科学性和可行性.该仿真系统运用Solid Works软件实现从设计、建模到仿真的一般方法,对船舶锚以及锚链等标准件建立数据库模型,导入或者建立船艏模型,然后装配,添加约束力,进行拉锚试验仿真. 相似文献
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船舶虚拟仿真技术在船舶建造评估中的应用研究 总被引:2,自引:2,他引:0
文章分析了当前船舶虚拟仿真评估技术的产业现状,介绍了船舶虚拟仿真技术在船舶建造评估中的应用发展趋势,对实现船舶虚拟仿真技术在船舶设计运用中存在的问题和难点进行了探讨,指出了我国先进船舶制造模式的关键技术和应用前景. 相似文献
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在虚拟现实技术的基础上,研究了基于Vega Prime实时视景仿真系统开发环境的某装备虚拟维修系统的总体框架,以及系统实时仿真应用程序设计、实体建模、仿真模型的驱动等关键技术,并在海军某型舰艇的减摇鳍装置的虚拟维修系统开发中应用,不仅能满足训练任务的需要,而且节约了经费,缩短了开发周期,具有非常重要的军事意义和广阔的应用前景。 相似文献
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