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By Yong Bai and Qiang Bai. Subsea repairs and inspection are costly for petroleum and pipeline engineers and proper training is needed to focus on ensuring system strength and integrity. Subsea Pipeline Integrity and Risk Management is the perfect companion for new engineers who need to be aware of the state-of-the-art techniques.
- Subsea Engineering Handbook (2nd ed.) by Bai, Yong (ebook)
- Yong Bai, Marine Structural Design
- Subsea Engineering Handbook Free Ebook Download Pdf
Subsea Engineering Handbook (2nd ed.) by Bai, Yong (ebook)
Marine Structural Design, Second Edition , is a wide-ranging, practical guide to marine structural analysis and design, describing in detail the application of modern structural engineering principles to marine and offshore structures. Organized in five parts, the book covers basic structural design principles, strength, fatigue and fracture, and reliability and risk assessment, providing all the knowledge needed for limit-state design and re-assessment of existing structures.
Updates to this edition include new chapters on structural health monitoring and risk-based decision-making, arctic marine structural development, and the addition of new LNG ship topics, including composite materials and structures, uncertainty analysis, and green ship concepts.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.
Knowledge and best practice in this field are constantly changing. Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds, or experiments described herein. In using such information or methods they should be mindful of their own safety and the safety of others, including parties for whom they have a professional responsibility. This book is written for marine structural engineers and naval architects, as well as mechanical engineers and civil engineers who work on structural design.
As reliability-based limit-state design becomes popular in structural engineering, this book may also serve as a reference for structural engineers in other disciplines, such as the engineering of buildings, bridges, and spacecraft. My former supervisors should be thanked for their guidance and inspiration. Robert Bea and Prof. Yao at Osaka University, and Prof. Fujikubo at Hiroshima University. The friendship and technical advice from these great scientists and engineers have been very important for me in developing the materials used in this book.
The collaboration with Dr Ruxin Song and Dr Tao Xu for a long period has been helpful in my development of research activities on structural reliability and fatigue, respectively. Preben Terndrup Pedersen and T. Yao, and Drs Yung Shin, C. Zhao, and H. I appreciate my wife Hua Peng and children, Lihua and Carl, for creating an environment in which it has been possible to continue to write this book for more than five years in different cultures and working environments.
I wish to thank all of the organizations and individuals mentioned in the above and many friends and authors who were not mentioned for their support and encouragement. With the rapid development of marine structural engineering, researchers and engineers are constantly exploring and advancing new design and analysis methods in this field. More and more new materials are being applied to marine structures, and new types of these structures have appeared.
The newly added chapters of this book focus on all the aforementioned areas, and we'd like to introduce the new progress to our readers. We hope that this book is a useful reference source for marine structural engineers and naval architects, as well as mechanical and civil engineers who work on structural design.
The authors would like to thank their graduate students, PhD students, and postdoctoral fellows who provided editing assistance Mr Huibin Yan and Mr Alex Lam. We wish to thank all of the organizations and individuals mentioned above and many friends and authors who were not mentioned for their support and encouragement.
This chapter discusses a modern theory for design and analysis of marine structures. The term marine structures refers to ship and offshore structures. The purpose of this book is to summarize these technological developments in order to promote advanced structural design. When this book was first drafted, the author's intention was to use it in teaching his course Marine Structural Design. This book addresses the marine and offshore applications of steel structures. Hence, it should also be of interest to engineers and researchers working on civil engineering and spacecraft structures.
This book is devoted to the modern theory for design and analysis of marine structures. The term marine structures refers to ships and offshore structures. Calculating wave loads and load combinations is the first step in marine structural design. For structural design and analysis, a structural engineer needs to understand the basic concepts of waves, motions, and design loads.
Extreme value analysis for dynamic systems is another area that has had substantial advances from to It is an important subject for the determination of the design values for motions and strength analysis of floating structures, risers, mooring systems, and tendons for tension leg platforms.
Once the functional requirements and loads are determined, an initial scantling may be sized based on formulas and charts in classification rules and design codes. The basic scantling of the structural components is initially determined based on stress analysis of beams, plates, and shells under hydrostatic pressure, bending, and concentrated loads. Three levels of marine structural design have been developed:. Until the s, structural design rules were based on the design by rules approach, which used experiences expressed in tables and formulas.
These formula-based rules were followed by direct calculations of hydrodynamic loads and finite element stress analysis. The finite element methods FEM have now been extensively developed and applied to the design of ships and offshore structures. Structural analysis based on FEM has provided results that enable designers to optimize structural designs. The design by analysis approach is now applied throughout the design process. The finite element analysis has been very popular for strength and fatigue analysis of marine structures.
During the structural design process, the dimensions and sizing of the structure are optimized, and structural analysis is reconducted until the strength and fatigue requirements are met.
The use of FEM technology has been supported both by the rapid development of computers and by information technologies.
Information technology is widely used in structural analysis, data collection, processing, and interpretation, as well as in the design, operation, and maintenance of ships and offshore structures.
The development of both computers and information technologies has made it possible to conduct complex structural analysis and process the results. To aid the FEM-based design, various types of computer-based tools have been developed, such as CAD computer-aided design for scantling, CAE computer-aided engineering for structural design and analysis, and CAM computer-aided manufacturing for fabrication. Structural design may also be conducted based on performance requirements such as designing for accidental loads, where managing risks is of importance.
Based on the first principles, the limit-state design criteria cover various failure modes such as. Each failure mode may be controlled by a set of design criteria.
The design criteria have traditionally been expressed in the format of working stress design WSD or allowable stress design , where only one safety factor is used to define the allowable limit. However, in recent years, there is an increased use of the load and resistance factored design LRFD that comprises a number of load factors and resistance factors reflecting the uncertainties and the safety requirements.
They have been calibrated against the WSD criteria and the inherent safety levels in the design codes. The calibration may be conducted using structural reliability methods that allow us to correlate the reliability levels in the LRFD criteria with the WSD criteria and to ensure the reliability levels will be greater than or equal to the target reliability. The LRFD is also called the partial safety factor design.
While the partial safety factors are calibrated using the structural reliability methods, the failure consequence may also be accounted for through the selection of the target reliability level. When the failure consequence is higher, the safety factors should also be higher.
Use of the LRFD criteria may provide unified safety levels for the whole structures or a group of the structures that are designed according to the same code.
Ultimate strength criteria are usually advocated in design codes for various basic types of structural components such as. Due to the combination of axial compression and initial deflection, the column may buckle when the axial compression approaches its critical value,. Initiation of yielding usually occurs in the most loaded portion of the structural members.
As the yielding portion spreads, the bending rigidity of the structural component decreases and consequently buckling occurs. For structural members other than unstiffened thin-walled shells, ultimate strength is reached when inelastic buckling occurs. The design of the components in ships and offshore structures is mainly based on relevant classification rules as well as API and ISO codes.
The classification rules are applicable to ocean-going ships, mobile offshore drilling units, and floating structures. It should be pointed out that final fracture is also part of the ultimate strength analysis.
In general, the strength criteria for code development may be derived using the following approaches:. From the above discussions, it is clear that the theoretical knowledge and practical design experience are vital for the successful development of ultimate strength criteria. As an alternative to the criteria in rules and codes, mechanical testing and finite element analysis may be applied to determine the ultimate strength of structural components.
For simple components, the prediction of finite element analysis and rule criteria is usually close to the results of mechanical testing. Therefore, mechanical testing is now mainly applied to subjects in which less experience and knowledge have been accumulated. The accidental loads that should be considered in the design of ship and offshore structures are, for example,. The term accidental loads refers to unexpected loads that may result in a catastrophe, causing negative economical, environmental, material consequences, and the loss of human life.
Extreme and accidental loads differ in the sense that the magnitude and frequency of the extreme loads can be influenced to a small extent by the structural design, whereas active controls may influence both the frequency and the magnitude of accidental loads.
Traditionally rigid-plastic analytical formulations have been popular for the designs against accidental loads because large plastic deformation is usually the mechanism for energy absorption in accidents. In recent years, the nonlinear finite element analysis has been used to simulate the structural behavior in accidental scenarios and to design the structure for the performance standards.
Use of the finite element analysis enables us to deal with complex accidental scenarios and to better predict the structural response. Fatigue damage and defects may threaten the integrity of marine structures. This concern is aggravated as the cost of repair and loss of production increases. Fatigue design is an important subject due to use of higher strength materials, severe environmental conditions, and optimized structural dimensions. The fatigue capacities are evaluated using the S—N curve approach or the fracture mechanics approach.
The S—N curves are established by stress-controlled fatigue tests and may generally be expressed as. The S—N curve approach is mainly applied in designs for fatigue strength, and it consists of two key components: determining a hot-spot stress and selecting appropriate S—N curves. Discrepancy has been observed between the hot-spot stresses predicted by different analysts or in different analyses. In recent years, there has been a rapid development in the standardization of the S—N curves.
The International Institute of Welding IIW has published new guidance documents on the selection of S—N curves and the determination of hot-spot stresses. With the increasing use of finite element analysis, a design approach based on the hot-spot stress will be increasingly popular.
The fatigue uncertainties are due to several factors such as. The accumulative fatigue damage for a structural connection over its life cycle is usually estimated using Miners rule, which sums up the damage caused by individual stress range blocks. D allow is the allowable limit that is defined in design codes. A simplified fatigue analysis may be conducted assuming that stress ranges follow Weibull distributions.
This kind of analysis has been widely applied in classification rules for fatigue assessment of ship structures. The Weibull parameters for stress distribution have been calibrated against in-service fatigue data for ships and more refined fatigue analysis. The value of Weibull parameters may be found from classification rules, as a function of ship lengths and locations of interest.
Yong Bai, Marine Structural Design
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Marine Structural Design, Second Edition , is a wide-ranging, practical guide to marine structural analysis and design, describing in detail the application of modern structural engineering principles to marine and offshore structures. Organized in five parts, the book covers basic structural design principles, strength, fatigue and fracture, and reliability and risk assessment, providing all the knowledge needed for limit-state design and re-assessment of existing structures. Updates to this edition include new chapters on structural health monitoring and risk-based decision-making, arctic marine structural development, and the addition of new LNG ship topics, including composite materials and structures, uncertainty analysis, and green ship concepts. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Knowledge and best practice in this field are constantly changing.
Subsea Engineering Handbook Free Ebook Download Pdf
Elsevier Internet Homepage: http:Nwww. Related Journals Free specimen copy gladly sent on request. To Contaet the PublisherElsevier welcomes enquiries concerning publishing proposals: books,journal special issues, conference proceedings, etc.
Apps The download picture may not Utilities reflect the books Telecharger condition or specific edition. Designing and building structures that will withstand the unique challenges that Apps exist in Subsea operations is no easy task. This handbook offers a "hands-on. Yong Bai obtained a Ph. Description of the book "Subsea Engineering Handbook": Designing and building structures that will withstand the unique challenges that exist in Subsea free operations is no easy Scarica task.
The design of these pipelines is a relatively new technology and continues to evolve in its quest to reduce costs and minimise the effect on the environment. With over 25years experience, Professor Yong Bai has been able to assimilate the essence of the applied mechanics aspects of offshore pipeline system design in a form of value to students and designers alike. It represents an excellent source of up to date practices and knowledge to help equip those who wish to be part of the exciting future of this industry. Yong obtained a Ph.
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