In order to improve the cabin modeling efficiency of AVEVA Marine(AM)software,the AM secondary development for parameterized cabin modeling is conducted with C#.The parameterized cabin and furniture are created and located,so as to realize the rapid cabin modeling,simplify the modeling work and operation flow,improve the modeling efficiency,and facilitate the use of relevant designers.The developed function of parameterized rapid cabin modeling is tested,and the high efficiency of AM secondary development is verified.
Based on the capture of Volatile Organic Compounds(VOCs)gases generated during the ship outfield painting operation,the design scheme of local gas collecting hood for ship outfield painting is formed with theoretical research,analogue simulation,and field tests,and the reasonable verification method is confirmed to check the feasibility and collection rate of the scheme.The results show that the local gas collecting hood of ship outfield painting can effectively capture VOCs gases,control the pollutant diffusion from the source,and reduce the pollution.
Taken a 150 000 tonner shuttle tanker as an example,a design scheme that can effectively reduce the hull light weight is proposed,and the impact of hull weight reduction on EEDI is assessed.The results show that:compared with the mother ship,the light weight of the designed ship is reduced by 1 464 t;the designed ship uses the weight reduction to increase the cargo deadweight,and its EEDI can be reduced by about 1.0%.The weight reduction scheme and reliability assessment method of the shuttle tanker can provide reference for the design and development of similar ships.
In view of the flat butt welds in ship construction,the steel base materials of different thicknesses are used to make a comparison of equivalence requirements of testing technology standards and conduct a testing equivalence test between Digital Radiography Testing(DRT)and conventional film Radiography Testing(RT),and DRT and conventional film RT of weld defects of test plate are evaluated.The results show that DRT and conventional film RT are of equivalence.
The status of legislation,treatment technology,biological detection,and shore-based reception of ship ballast water in China is studied.The results show that:the legislation of ballast water is relatively late,and the foreign regulations and international conventions are mainly used for reference;the treatment technology of ballast water is at the leading level,and the technical solutions cover the mainstream directions such as electrolysis and ultraviolet light;there are many biological detection sampling institutions of ballast water,and most of them are of testing qualifications of D-2 standard;there is the shore-based reception capability of ballast water,but currently there is not the example of port installation and reception.The treatment technology and testing technology of ballast water in China are relatively advanced,but the legislation protection and shore-based reception still need to be further improved.
In view of the problems of clean electricity consumption of berthing ships and rapid response of power supply of some ports,small islands,and offshore platforms,the development status of large Liquefied Natural Gas(LNG)generating ships and their main systems are expounded,the relevant design experience of LNG ships at home and abroad is cited,and the hull,LNG piping system,and power-propulsion complex system of 20 MW LNG generating ship are designed with the modular design method,which can provide the optional solutions to the main difficulties in the design of the ship.
In order to rationally arrange the steel plate purchase and effectively reduce the inventory occupation,the steel plate Purchase Order(PO)optimization based on the safety inventory management is studied.Based on the purchase flow and purchase objective of steel plate,the influencing factors of steel plate safety inventory are analyzed.According to the steel plate management business flow,the steel plate safety inventory management flow is expounded,and the steel plate PO is optimized,which can help the shipyards achieve the better steel plate management.
The organic solvent waste liquor is produced during the paint residue treatment of used paint bucket for ships,which brings the environmental harm.The advantages and disadvantages of four treatment methods for organic solvent waste liquor,such as incineration method,membrane separation method,biological method,and distillation method,are analyzed,which can provide ideas for the green and sustainable development of ship modernization construction in China.
The basic principle and application field of laser cladding and development situation of deep learning model are introduced,and the application of deep learning in the laser cladding field is expounded.The deep learning uses the neural network model to monitor the laser cladding process,which is of good advantages in the parameter optimization of cladding technology and the quality control of cladding process,and can effectively improve the precision and stability of laser cladding process.
The current situation and demand of ship repair shifting management of domestic ship repair enterprises are analyzed.Based on the architecture scheme of shifting management system,the informatization means are used to integrate the technologies such as vectorization map engine,Automatic Identification System(AIS)ship dynamic positioning,and regional intelligent identification into the existing ship repair shifting management.The ship repair shifting management system based on informatization is built to solve problems such as extensive planning and untimely feedback of actual information during ship repair shifting management,and achieve the efficient coordination among various departments in ship repair shifting management.
In view of the structure strength design problem of flare stack of offshore platform flare tower,the static analyses of single flare stack of flare tower and three flare stacks of flare tower are made with the statics module of Ansys software,and the structural stress values and deformation displacement values under different working conditions are obtained.The results show that the maximum pressure load that a single flare stack of flare tower can bear is greater than that of three flare stacks of flare tower.The analysis method and results of flare stack of flare tower are of certain guiding significance for the subsequent design and installation of petrochemical waste gas treatment equipment.
The basic principle and technical advantages of Digital Radiography Testing(DRT)technology are analyzed,and the application examples of DRT technology in on-line testing of pressure pipeline weld are introduced.Compared with conventional Radiography Testing(RT)technology,DRT technology can conduct more visual and clear testing in the internal quality of welding materials,promote more precise weld testing results,and contribute to the safe operation of pressure pipeline.
Started with the ship painting,in order to replace the traditional alkyd paint with a new-type engine room epoxy paint,the relevant technical process parameters comparison,matching scheme comparison,construction cycle comparison,and cost comparison are made,so as to improve the painting efficiency,reduce the paint consumption,and reduce the Volatile Organic Compounds(VOCs)emission.
Taken 2 000 t self-elevating self-propelled integrated offshore wind power installation platform as an example,the arrangement optimization of engine room ventilation system is performed.The optimization scheme is introduced in detail in air duct path,air volume distribution,air duct size,and air duct structure,so as to solve the difficulties encountered during the actual ship arrangement of engine room ventilation system for the platform,which can provide reference for the design and optimization of engine room ventilation system for similar platforms in the future.
In order to improve the space sense of cruise ship and reduce the column number of large space structure,the large space structure on top of restaurant in a cruise ship project is dissected.The standard calculation,mechanical calculation,beam system finite element calculation,and plate-girder structure finite element calculation are compared,the influence of whether there are columns on the section weight,structural size,headroom height,and structural deformation is analyzed,and the sensitivity of column design for large space structure is analyzed,which can provide reference for the column design for large space structure in cruise ship.
The complex marine environment and underwater equipment forms are comprehensively considered,the technical difficulties and operational efficiency of underwater equipment laying and recovery in deep-sea mining operations are deeply analyzed,and the configuration and layout design of underwater equipments such as collecting conveyer,relay bin,lifting pump,and lifting pipe in laying and recovery system is made to form the underwater equipment laying and recovery technology of deep-sea mining vessel.The research results can provide reference for the design and manufacture of underwater equipment laying and recovery system of deep-sea mining vessel,and provide technical support for the engineering application of deep-sea mining vessel.
In order to improve the ship holes management ability,in view of the function of holes management modules of AVEVA Marine(AM)software,according to the actual production business requirements of shipyard design,the holes coordination flow is formulated and the holes coordination rule database is designed.Combined with the secondary development ability of AM software,the ship holes management auxiliary system is developed.Taken the piping system as an example,the system is compared with the holes management function of AM software to verify the feasibility of the system in ship holes management.
Liquefied Natural Gas(LNG)exists in the form of multiple droplets during the tank precooling,and the evaporation model of LNG multiple droplets in the same steam lacks at this stage.Based on the double droplets,an evaporation model that is applicable to LNG double droplets in its steam is established with Computational Fluid Dynamics(CFD)method.The new model is used to simulate the tank precooling process with temperature difference of 190 K,relative distance of 10～70,and particle size of 0.1～2.5 mm.The results that are of the practical application value are obtained:the temperature decreases faster in the initial stage of tank precooling,and with the increase of time,the greater the relative distance between double droplets,the smaller the end time of tank precooling;the end time of tank precooling of double droplets is inversely proportional to the particle size,and positively proportional to the initial temperature.The new model can be adapted to the practical engineering applications.
The analysis of integrated application and interface of podded propulsion system on intelligent unmanned system mother ship is made,and the analysis of integration of intelligent navigation and remote control system and interfaces of intelligent navigation and podded propulsion system is made.The operation modes and control logic of intelligent unmanned system mother ship,such as manual driving,intelligent navigation,and remote control,etc.,are expounded,which can provide lessons and reference for the design and construction of similar intelligent ships.
为排除大型邮船房舱门窗开口结构发生变形的可能性,需要开展变形监测.在大型邮船船体结构完工后的全船起浮过程中,运用高精度激光跟踪仪,对房舱门窗开口结构进行起浮过程变形监测.测量并收集起浮过程不同阶段的房舱门窗开口结构三维坐标数据,经分析对比,掌握房舱门窗开口结构起浮过程变形情况,为大型邮船的结构设计和建造的可靠性与安全性提供数据支撑.
