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Multi-Objective Redundancy Optimization of Continuous-Point Robot Milling Path in shipbuilding

Computer Modeling in Engineering & Sciences 2023年第2期134卷 1283-1303页

作者： Jianjun Yao Chen Qian Yikun Zhang Geyang Yu College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin150001China

The 6-DOF manipulator provides a new option for traditional shipbuilding for its advantages of vast working space,low power consumption,and excellent ***,the rotation of the end effector along the tool axis is functionally redundant when using a robotic arm for five-axis *** the process of ship construction,the performance of the parts’protective coating needs to bemachined tomeet the Performance Standard of Protective Coatings(PSPC).The arbitrary redundancy configuration in path planning will result in drastic fluctuations in the robot joint angle,greatly reducing machining quality and *** have been some studies on singleobjective optimization of redundant variables,However,the quality and efficiency of milling are not affected by a single factor,it is usually influenced by several factors,such as the manipulator stiffness,the joint motion smoothness,and the energy *** solve this problem,this paper proposed a new path optimization method for the industrial robot when it is used for five-axis *** path smoothness performance index and the energy consumption index are established based on the joint acceleration and the joint velocity,*** path planning issue is formulated as a constrained multi-objective optimization problem by taking into account the constraints of joint limits and singularity ***,the path is split into multiple segments for optimization to avoid the slow convergence rate caused by the high *** algorithm combining the non-dominated sorting genetic algorithm(NSGA-II)and the differential evolution(DE)algorithm is employed to solve the above optimization *** simulations validate the effectiveness of the algorithm,showing the improvement of smoothness and the reduction of energy consumption.

关键词： shipbuilding robot milling functional redundancy path optimization multi-objective

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High Performance Structural Steels for shipbuilding and Offshore Structures

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Journal of Iron and Steel Research International 2011年第S1期18卷 90-98页

作者： Choo Wung-Yong Suh In-Shik Kim Sang-ho An Gyu-Baek Lee Chang-Sun Technical Research Laboratories POSCO1 Geodong-dongNam-guPohangGyungbuk790-785Korea

Recently,there have been the increase of ship size and the development of oil and gas in arctic *** trends have led to the requirements such as high strength,good toughness at low temperature and good *** high performance structural steels for shipbuilding and arctic offshore structure have been developed by our own micro-alloying and TMCP technologies.M-A constituent was precisely controlled in the both HAZ and base metal to get high toughness at low ***,the grain growth of austenite at HAZ was effectively suppressed by thermally stable TiN particles,leading to a good HAZ *** the other hand,there has been the key issue of crack arrestability in large size container *** effect of joint design on crack arrestability was investigated to prevent a catastrophic failure along the block joint of hatch side coaming.A brittle crack arrest technique was developed without block joint shift,using an arrest weld in the end of hatch side coaming weld line.

关键词： shipbuilding offshore weldability toughness micro-alloying TMCP brittle crack crack arrestability

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Achievements and developing trend of welding technology in Chinese shipbuilding

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China Welding 1996年第2期5卷 81-88页

作者： ZHOU Guosheng and WU Jing(Science and Technology Bureau of CSSC,Beijing.100861)(Technology Research & Economy Development Institute, China State shipbuilding Corporation.)

China's shipbuilding welding industry has passed a history of 40 years,and the rapid progresses in high efficient and automatic welding technology taken place in the recent 10 years, have made significant contribution to the development of national shipbuilding industry as well as to the state key projects, which promotes the welding consumables and equipment industry in *** article presents the new welding technologices used in Chinese shipbuilding industry,particularly in recent decade,including new welding consumables and equipment,and economical benfit, caused by these new technologies,and predicts foe welding technology developing trend for Chinese shipbuilding industry in authors'opinion.

关键词： shipbuilding welding technology

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Research on the Computer Supported Cooperative shipbuilding System Based on PDM

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武汉理工大学学报 2006年第S2期28卷 423-427页

作者： YUE Weihong~1 WANG Chengfang~1 ZHANG Qingying~2 1.School of Transportation,Wuhan University of Technology,Wuhan 430063,China 2.School of Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China School of Transportation Wuhan University of TechnologyWuhan 430063China School of Logistics Engineering Wuhan University of TechnologyWuhan 430063China

shipbuilding is becoming more complex and requires many different enterprises and plants to work cooperatively to strive for the maximum *** by the computer technology,information technology,and internet technology etc., CSCW (Computer Supported Cooperative Work) plays a very crucial role in the multi-team,multi-subject,multi-layer field. According to shipbuilding characters and market requirements,the computer supported cooperative shipbuilding technology is re- searched *** technologies to realize it are analyzed,and construction of the computer supported cooperative manufactur- ing environment is deeply *** the base of them,scheme of the computer supported cooperative shipbuilding system based on PDM (Product Data Management) is put forward,which is useful to improve and develop the shipbuilding industry.

关键词： PDM CSCW shipbuilding

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shipbuilding—An Analysis from the Perspective of Enterprise Resources Planning System

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World Journal of Engineering and Technology 2023年第1期11卷 81-112页

作者： Mihaela-Greti Manea Emil Manea “Mircea celBǎtrîn” Naval Academy Constanta Romania Greece Representative Office of Constanta Shipyard Romania Kallithea Athens Greece

Designed as a tool for business intelligence, resource planning is used to manage the essentials of a business by integrating processes into a single system. Enterprise Resource Planning (ERP) solutions ensure all the organizational, operational, and procedural structures interconnection, which can be both an advantage and a disadvantage, knowing that inefficiency within one structure will lead to inefficiency in others. The originality of the approach consists in the unitary analysis of all processes which shipbuilding involves (design;evaluation of ship construction possibilities;contracting of works;contracting of supply of materials and equipment;presentation of inspections for the completed works reception;delivery of the ship into operation). The systemic approach is a notable contribution by highlighting the input and output quantities for the analyzed processes. Also, where it was found relevant, the diagrams highlight the owners of the process and show the interconnectivity of the functional departments within a shipyard. Although it is obviously the expression of in-depth knowledge of the peculiarities of Romanian shipyards, the authors hope that the work can support any shipyard that may be interested in knowing these structures (as a logical scheme mandatory to design a custom ERP software system).

关键词： shipbuilding Shipyard Production Structures Enterprise Resource Planning Processes Flow

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shipbuilding Industry Economic Performance Analyzed for H1 2019

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船舶经济贸易 2019年第8期 58-64页

作者：无 China Association of the National shipbuilding Industry (CANSI)

I. Basic Information of Economic Operation A. National Three shipbuilding Indexes A Mixed Bag National shipbuilding completion reached 19.66 million dwt in H1, up 4.2% YOY;new ship orders reached 12.06 million dwt, down 46.9% YOY;by the end of June, handheld ship orders had reached 81.72 million dwt, down 10.3% YOY and down 5% from the end of 2018. Export ships accounted for 92.9%, 91.5% and 90.8 % of national shipbuilding completion, new ship orders and handheld ship orders respectively.

关键词： shipbuilding Industr Economic Performance Analyzed Economic Operation

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The risks in shipbuilding and shipbuilding insurance in China

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海大法律评论 2020年第1期 49-70页

作者： HU Zhengliang Law School of Shanghai Maritime University Shanghai 201306

1 Introduction shipbuilding has the features of high investment,high technical contents,strict regulatory requirements,complicated process,long duration,and significant fluctuation of market price of ship and the prices of materials,machinery and equipment needed for the *** shipbuilding industry is not only capital-intensive,technologyintensive and labor-intensive industry,but also risk-intensive.

关键词： investment shipbuilding industry

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An Overview of Bangladeshi shipbuilding in the Light of Competitive Parameters

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Journal of Shipping and Ocean Engineering 2011年第1期1卷 8-19页

作者： N.M.G. Zakaria M.T. Ali K.A. Hossain Department of Naval Architecture and Marine Engineering Bangladesh University of Engineering and Technology Dhaka 1000Bangladesh

shipbuilding in Bangladesh has been considered as the most promising industry in the recent time and the country is dreaming to emerge as a middle income country within a short time by maintaining the upward trend of this sector. However, due to global nature and the long term sustainability of this shipbuilding industry, an investigation of competitiveness in terms of global standard is of prime importance. This paper focuses on studying some crucial competitive factors like labor skill, labor availability, labor man-hour, labor cost ＆ productivity for local shipbuilding in Bangladesh. The analysis also focuses on existing access to the resources like materials, knowledge and capital which are equally important factors for the expansion of shipbuilding. Comparison of these parameters with other nations have been made qualitatively and quantitatively to find the level of our shipbuilding. On the basis of existing condition and future vision, some recommendations have been made which might be useful for accelerating the development of this sector.

关键词： shipbuilding competitive factor productivity R&D labor cost.

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Bank’s repayment obligations under refund guarantees in shipbuilding finance

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海大法律评论 2013年第1期 217-240页

作者： ZHENG Lei School of Law Shanghai Maritime University

The refund guarantee is undoubtedly a significant document required in the shipbuilding projects. Due to the lack of uniform test for identifying the independent guarantee in different jurisdictions,slight differences to the terms of guarantee coupled with the different facts of each case can result in dramatically different rulings as to the nature of the refund guarantee and bank’s obligation for repayment of installments thereunder. It is also noteworthy that different refund guarantee may provide the beneficiary with different coverage. From the comparison among CSTC Form,Shanghai Form and NEWBUILDCON Form,it is suggested that the terms of the contract and refund guarantee of the NEWBUILDCON are more favorable to the buyers and buyers’ banks than the other two forms.

关键词： shipbuilding shipbuilding finance refund guarantee bank's repaymentobligations

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Economics and Management of shipbuilding Clusters： Possibilities for Integrating Croatian shipbuilding in the EU shipbuilding Industry

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Chinese Business Review 2011年第3期10卷 173-186页

作者： Danijela Sokolic University of Rij eka Rij eka Croatia

If managed properly, the shipbuilding industry could have a high multiplication effect. This is why it is often considered as the key industry in economic development in many national economies, especially those in transition. The three major players in the global shipbuilding industry are South Korea, China and Japan. Europe is positioned forth, but its market share is decreasing rapidly. This is also the case with the Croatian shipbuilding industry. This paper aims to critique the level of adaptability of Croatian shipyards to the rapidly changing environment of global industry. It also relates the question of survival and sustainable development of Croatian shipbuilding and strategic positioning of European shipbuilders. The results of this research had shown that without clusterizing the shipbuilding industry at EU integration level, and not at national levels, Europe will soon loose the struggle for market position improvement or even maintenance to the far more organized Asian rivals. Findings regarding the Croatian shipbuilding industry indicate the absence of a viable strategy on the national level. Furthermore, the paper tries to prove that success will be based on the possibility and will of Croatian shipbuilders to form strong collaborations mad business networks with subcontractors and other institutions. This should not be limited only at national level, but should incorporate different kinds of EU shipbuilding consortiums and clusters as well as other forms of strategic alliances.

关键词： shipbuilding cluster business network Croatia EU

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