Structure Design and Strength Analysis of Steel Tower and

Base Platform for Deep-sea Mining Facilities

 

LI Wenhao^1,2, YU Qian^1,2, YANG Gaosheng^1,2, CHEN Dandong^1,2, PAN Zhijie³

(1. China Ship Development and Design Center, Wuhan 430064, China;

2. Wuhan Ship Development Design Institute, Wuhan 430064, China;

3. CNPC Baoji Oilfield Machinery Co., Ltd., Baoji 721002, China)

 

Abstract: The differences between the deep-sea mining test project and the offshore oil drilling platform are analyzed and compared in this paper. The steel tower and the base platform suitable for deep-sea mining is designed based on the calculation of design loads and the analysis of operating conditions. ANSYS finite element software is used in both the modeling of tower and base platform and the analysis of static structural strength. The result shows that the design of tower and base platform meets the special needs of deep-sea mining project. It provides reference for the subsequent function design of the tower and base platform, the structural optimization, the overall layout optimization and etc.

Key words:deep-sea mining; tower; base platform; finite element analysis; static structure

 

 

 

Stress Concentration Optimization for the Opening Edges of

FPSO Deck Grillage Frame

 

LIU Wenzheng, WANG Pu

（Marine Design & Research Institute of China, Shanghai 200011, China）

 

Abstract:Stress concentration is very common in large marine structures including ships. To reduce the stress concentration and to avoid fatigue crack damage caused by stress concentration, it is necessary to check the stress concentration factor and to provide reinforcement to the opening regions in the ship structural design. This study produces several feasible reinforcement schemes with the perforated bow deck grillage frame of a FPSO (Floating Production Storage and Offloading)as the object. The finite element analysis software is used to calculate the stress concentration factors at the opening edges of the optimized schemes, and the effect of different optimization schemes on the stress concentration is analyzed. Thus the stress concentration reinforcement scheme satisfying the design requirements is obtained by calculations and optimization. The analysis result shows that the stress concentration at the opening can be significantly reduced by the composite strengthening method.

Key words:stress concentration; stress concentration factor; finite element analysis; analysis and optimization

 

 

 

Hull Line Optimization Based on Parametric Modeling of

Fore and Aft Bodies and Self-propulsion Calculation

 

LU Chenliang, YANG Bo, ZHANG Qixin

（Shanghai Merchant Ship Design and Research Institute, Shanghai 201203, China）

 

Abstract:Taking a bulk carrier as the example, this paper introduces the hull line optimization method based on the fully parametric modeling of fore and aft bodies and the self-propulsion computation using CFD (Computational Fluid Dynamics).The parametric models of fore and aft bodies are created and transformed. The computations of hull resistances and self-propulsion are carried out with CFD to finally obtain the optimal parametric model that has the lowest propeller received power and satisfies the general performance requirements.

Key words:parametric modeling and transformation of fore and aft bodies; resistance calculation by CFD; self-propulsion calculation; optimization for propeller received power

 

 

 

Design of Hatch Cover to Fit Very Large Ore Carrier

 

TANG Qi，YU Junzhen

(TTS Hua Hai Ships Equipment Co., Ltd., Shanghai 200093, China)

 

Abstract:The relative deformations between the hatch cover and the hatch opening are studied based on the analysis of theoretical deformations of large hatch opening of large ore carriers, so as to improve the design of hatch covers and the hatch coaming connection device, and to make the hatch covers adaptable to the large deformations under both berthing and sailing conditions.

Key words:large ore carrier; hatch cover; deformation adaptation

 

 

 

Computational Analysis of Global Vibration for Refit Ship

 

WANG Zaochun，TAO Guojun，HU Quanmin

（Hudong-Zhonghua Shipbuilding (Group) Co., Ltd., Shanghai 200129, China）

 

Abstract: The transfer matrix method is used to calculate and analyze the global vibration frequencies and vibration modes of a refit ship under both full load and ballasted conditions. The global vibration natural frequencies of the refitted ship are predicted to produce engineering guidance for the structural refit design and the anti-vibration measures of equipment. The adopted calculation method is expected to provide reference for the prediction and analysis of ship′s global vibration frequencies and vibration modes.

Key words:transfer matrix method; free vibration computation; forced vibration computation; natural frequency of global vibration

 

 

 

Study and Analysis of Exterior Color for

Ferries Sailing in the Mediterranean Region

 

DAI Mali, GAO Jun

(Shanghai Merchant Ship Design and Research Institute, Shanghai 201203, China)

 

Abstract: This paper introduces the exterior colors of the ferries belong to three ferry companies operating in the Mediterranean region, i.e., ANEK Ferry, HELLENIC SEAWAY and Blue Star Ferry. The basis for the distribution, composition and proportion of the ferry′s exterior color is studied by analyzing the surrounding environment of the ferries. Based on this, suggestions are made for the exterior color design of the future domestic ferries including improving visual effect by color, reducing the discomfort due to environment by color, and signing the company by iconic color.

Key words: Mediterranean; ferry; exterior color

 

 

 

Analysis of Noise Reduction and Its Solutions for Air Conditioning

and Ventilation System in the Living Area of

300 FTDrilling Platform

 

ZHANG Shengju

（Shanghai Zhenhua Heavy Industry (Group) Co., Ltd., Shanghai 200125, China）

 

Abstract:The long work hours of offshore drilling platforms at sea makes it urgent to provide a comfortable living environment for the staff onboard. Of which, reducing noise in both working and living areas of the platform is one of the most important items. This study gives a more reasonable HVAC pipeline layout scheme according to the design optimization and other corresponding noise reduction measures based on the production design. It is proved in the test onboard that the comfort level of working and living areas of the offshore platform has been improved significantly, the noise level is reduced by 10% compared with the previous one, and the cost is greatly deducted.

Key words: offshore platform; platform air conditioning; HVAC system; vibration and noise reduction; design optimization

 

 

 

A Study on the Emission of Diesel Generator/Battery Hybrid

Propulsion System of a Cruise Ship

 

WU Sichen^a, LI Tie^a,b, YI Ping^a, WU Shen^a, YAO Gang^c

(a. State Key Laboratory of Ocean Engineering;

b. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration;

c. Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education,

ShanghaiJiao Tong University, Shanghai 200240, China)

 

Abstract: This study carries out the simulation of ship′s fuel consumption and emission inside/outside the emission control zones under cruising, maneuvering and berthing conditions with a medium-size cruise ship as the object, where the traditional diesel generator power system is combined with power battery and shore power. Based on the energy management optimization algorithm, the MATLAB/Simulink software is used for simulation and the actual navigation data information is taken into account. The paper also elaborates the application potential of shore power and battery in medium-size cruise ships.

Key words:power battery; power system; energy management; energy saving and emission reduction

 

 

 

Design and Application of Automatic Welding Production Line for

Marine T-sections

 

WANG Yanjun

（China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200090, China）

 

Abstract: In order to raise the level of automatic and intelligent shipbuilding, and to establish the mode of ship intelligent manufacturing, the self-adaptive and self-controlled process equipment such as assembly machines and gantry welding machines are adopted to match the automatic conveying device, and the production line management system is established based on the proper design and layout of process for the welding production line involved in the mass production and assembly line operation of marine T-sections. The equipment information at each station is collected and processed to achieve the fully automatic process of product transportation, allocation, assembly and welding, so as to realize management digitalization, and effectively improve the production efficiency and quality benefit of T-section production in the shipyards.

Key words:T-section; welding production line; automation; assembly machine; gantry welding machine; management system platform

 

 

 

A Technology to Move the Temporary Side Hole Process

Forward Based on 3D Model

 

WAN Li, XIA Yongfeng, LUO Jin

（Hudong-Zhonghua Shipbuilding (Group) Co., Ltd., Shanghai 200129, China）

 

Abstract: In order to effectively reduce ship’s construction period, this paper analyzes the technology that helps to move the temporary side hole’s processing of cargo tanks forward. A certain ship is taken as the example to analyze and compare the pros and cons of the temporary hole processing during the stages of block, pre-erection and erection based on a unified 3D model from the perspective of intelligent ship design. On this basis, the platform group stage is selected to open the holes, and the total section erection plan is prepared. The TSV-BLS software is used to analyze the forces and deformations during the rollover erection after hole opening, and the rationality of the scheme is verified based on the unified 3D model, which provides references for other ships to move the side hole opening process forward.

Key words: unified 3D model; temporary side hole; hole opening stage; move process forward; TSV-BLS software

 

 

 

Application of Extruded Thin Wall Pipe in Fresh Water System

 

TANG Xiaodong

（Marine Design & Research Institute of China, Shanghai 200011, China）

 

Abstract: As a new type of pipeline connection, extruded thin wall pipes are more and more used in marine pipeline systems. This paper introduces the basic methods of production design and field installation of extruded thin-walled pipes as well as the matters needing attention based on the analysis of typical points of extruded thin-walled pipes compared with traditional pipelines, and the application demand of a ship under construction, so as to provide reference for the design and installation of marine fresh water pipelines using this new type of connection method.

Key words:extruded; thin wall tube; fresh water system; field installation

 

 

 

A Research on FPSO Single-point Cabin

Construction Process and Its Application

 

SHI Liang, LIU Chuanhui, KONG Qiang, ZHAO Lijun

（Offshore Oil Engineering Co., Ltd., Tianjin 300461, China）

 

Abstract: This study focuses on the construction process of FPSO (Floating Production Storage and Offloading)to make it meet the strength and accuracy requirements of FPSO single-point cabin. A feasible construction process with the cylinder and the surrounding strengthening structures built separately is proposed by analyzing the structural characteristics of a single bearing internal turret single-point cabin according to the construction accuracy requirements and evaluating the factors such as the tooling design, cylinder fabrication and dock closing. Specific implementation of cylinder assembly, welding process monitoring and deformation control measures are also discussed.

Key words: single-point cabin; structure; construction accuracy; deformation control

 

 

 

A Research on the Schemes to Improve

Efficiency of Marking Machine

 

BAI Yanmei

（Jiangnan Shipbuilding Group Co., Ltd., Shanghai 201913, China）

 

Abstract:This study proposes a scheme to solve the issue that two marking machines which mark lines for cutting machines cannot achieve the expected working efficiency during operation. Modifications to the line drawing path, the marking content and the spray method are produced to optimize the marking scheme based on the analysis of factors affecting the marking efficiency to reach the expected goal of two marking machines serving seven cutting machines. The result of statistical analysis shows that one marking machine can principally serve 2.5 cutting machines after the optimization,

Key words:cutting machine; marking machine; line drawing path

 

 

 

Intelligent Valve Design Based on CATIA V6 Knowledge Engineering

 

WANG Yanzhen, XU Sihao, CHEN Yong, WANG Han

（Marine Design and Research Institute of China, Shanghai 200011, China）

 

Abstract: In the preliminary design and detailed design stages of marine pipeline systems, valve components need to be arranged to reflect the system design and to reserve operating space for other professionals. The traditional design method can hardly meet the requirements of rapid collaborative update along with system design updates. To solve the issue, the knowledge driven parametric design is brought forward based on CATIA V6,where the key points for valve design are analyzed according to the parametric design and the knowledge engineering technology. The CATIA V6 knowledge engineering is used to integrate the design knowledge into the design process, which significantly improves the design efficiency, the modifiability of the design model and the response speed. This method can be extended to the design scenarios of other ship accessories, so as to further improve the intelligent level of 3D ship design.

Key words: CATIA V6; knowledge engineering; parametric valve; collaborative development

 

 

 

Discussion on Measures to Improve the Effectiveness of Technical

Journals in the Service of Shipbuilding Industry

 

WANG Weili¹, BAI Qingxia²

（1. Shanghai Ship and Shipping Research Institute, Shanghai 200135, China;

2. The First Research Institute of Telecommunications Technology Co., Ltd., Shanghai 200032, China)

 

Abstract:In order to improve the quality of technical journals, and to better serve the development of the shipbuilding industry, this paper studies the development mode of technical journals and proposes to apply the new technologies such as block chain, artificial intelligence and the fast sharing of research data and research achievements to establish the quality control system on the basis of analyzing the problems encountered in the editing work, so as to make the technical journal combine, promote and move forward with the shipbuilding industry.

Key words:editing and proofreading quality; edit; proofreading; normative

 

 

 

Construction and Implementation of Enterprise EPC

General Contracting Mode

 

WU Han, HOU Jie, WANG Jiajun, CAI Wenting, YU Zhihong

（China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200090, China）

 

Abstract:This paper proposes the EPC (Engineering Procurement Construction) general contracting mode that integrates engineering, purchasing and design in a package to solve the problems of high cost, hard task, long duration and complicated management of the traditional general contracting mode. The advantages of the EPC general contracting mode are analyzed, and the development of general contracting mode by China Shipbuilding NDRI Engineering Co., Ltd. is elaborated. The management and control methods of EPC general contracting mode and the advantages of implementing EPC general contracting mode for economic and social benefits are analyzed and summarized according to the EPC general contracting project of Alexandria Shipyard in Egypt, then the establishment of organizational system for EPC general contracting projects is introduced.

Key words: EPC general contracting; project management; shipyard