Reliability Assessment And Random Vibrations Of Time Dependent Systems
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Reliability Assessment And Random Vibrations Of Time Dependent Systems
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Author :
language : en
Publisher:
Release Date : 2017
Reliability Assessment And Random Vibrations Of Time Dependent Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Engineering categories.
Reliability and fatigue life estimation are important in acquisition, maintenance and operation of engineering products. Time-dependent reliability has become an important area of research in recent years, in order to design products which perform their desired function throughout their lifecycle. Without considering the reliability degradation through time, munexpected (sic) failures may occur and lifecycle cost may increase due to potential warranty costs, repairs and loss of market share. In this research, we introduce three new methods for calculating the uncertainty in the output of dynamic, linear and non-linear vibratory systems excited by Gaussian and non-Gaussian imput random processes. After the calculation of output uncertainty, we estimate the time-dependent reliability as well as the probability distribution of fatigue life. The first method we introduced, performs reliability analysis of linear vibratory systems with random parameters, excited by stationary of non stationary Gaussian random processes. We space-fill the imput parameter space and for each design point, we calculate the corresponding time-dependent conditional probability of failure, using random vibration principles and integral equation involving up-crossing and joint up-crossing rates. A time-dependent metamodel is then created between the input parameters and the output conditional probabilities. Using this metamodel we can estimate the conditional probabilities for any set of input parameters. Finally, the total probability theorem is applied to calculate the overall time-dependent probability of failure. The second methodology calculates the statistics of the output process of a linear vibratory system excited by non-Gaussian random processes, condisering (sic) the effects of skewness and kurtosis. The non-Gaussian processes are characterized using their first four statistical moments and a correlation structure. For the output processes, the moments and autocorrelation can be calculated analytically. A stochastic metamodel is developed for the output, to generate new trajectories without solving the system. Finally, fatigue analysis is performed and the PDF of fatigue life is calculated. The third methodology is similar with the second, but is applicable to nonlinear vibratory systems excited by non-Gaussian random processes. The four moments and autocorrelation of output processes, are calculated using time integration of the system differential equations of motion. The time-dependent probability of failure is calculated, using a stochastic metamodel developed for the output process. All new methodologies are demonstrated with representative examples.
Proceedings Of The 2nd International Conference On Mechanical System Dynamics
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Author : Xiaoting Rui
language : en
Publisher: Springer Nature
Release Date : 2024-06-18
Proceedings Of The 2nd International Conference On Mechanical System Dynamics written by Xiaoting Rui and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-06-18 with Science categories.
The 2nd International Conference of Mechanical System Dynamics (ICMSD2023) is devoted to “Technology Innovations by Understanding Mechanical Dynamics”, with 18 sessions to promote research in dynamic theories on complex structures, multidisciplinary integration, and advanced technologies for applications. It is held on September 1–5 in Peking University, Beijing, China. The conference is expected to provide a platform for academic researchers and engineers in the field of mechanical system dynamics to exchange scientific and technical ideas.
Reliability Based Analysis And Design Of Structures And Infrastructure
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Author : Ehsan Noroozinejad Farsangi
language : en
Publisher: CRC Press
Release Date : 2021-09-27
Reliability Based Analysis And Design Of Structures And Infrastructure written by Ehsan Noroozinejad Farsangi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-27 with Technology & Engineering categories.
Increasing demand on improving the resiliency of modern structures and infrastructure requires ever more critical and complex designs. Therefore, the need for accurate and efficient approaches to assess uncertainties in loads, geometry, material properties, manufacturing processes, and operational environments has increased significantly. Reliability-based techniques help develop more accurate initial guidance for robust design and help to identify the sources of significant uncertainty in structural systems. Reliability-Based Analysis and Design of Structures and Infrastructure presents an overview of the methods of classical reliability analysis and design most associated with structural reliability. It also introduces more modern methods and advancements, and emphasizes the most useful methods and techniques used in reliability and risk studies, while elaborating their practical applications and limitations rather than detailed derivations. Features: Provides a practical and comprehensive overview of reliability and risk analysis and design techniques. Introduces resilient and smart structures/infrastructure that will lead to more reliable and sustainable societies. Considers loss elimination, risk management and life-cycle asset management as related to infrastructure projects. Introduces probability theory, statistical methods, and reliability analysis methods. Reliability-Based Analysis and Design of Structures and Infrastructure is suitable for researchers and practicing engineers, as well as upper-level students taking related courses in structural reliability analysis and design.
Reliability Assessment Using Stochastic Finite Element Analysis
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Author : Achintya Haldar
language : en
Publisher: John Wiley & Sons
Release Date : 2000-05-22
Reliability Assessment Using Stochastic Finite Element Analysis written by Achintya Haldar and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-05-22 with Technology & Engineering categories.
The first complete guide to using the Stochastic Finite Element Method for reliability assessment Unlike other analytical reliability estimation techniques, the Stochastic Finite Element Method (SFEM) can be used for both implicit and explicit performance functions, making it a particularly powerful and robust tool for today's engineer. This book, written by two pioneers in SFEM-based methodologies, shows how to use SFEM for the reliability analysis of a wide range of structures. It begins by reviewing essential risk concepts, currently available risk evaluation procedures, and the use of analytical and sampling methods in estimating risk. Next, it introduces SFEM evaluation procedures, with detailed coverage of displacement-based and stress-based deterministic finite element approaches. Linear, nonlinear, static, and dynamic problems are considered separately to demonstrate the robustness of the methods. The risk or reliability estimation procedure for each case is presented in different chapters, with theory complemented by a useful series of examples. Integrating advanced concepts in risk-based design, finite elements, and mechanics, Reliability Assessment Using Stochastic Finite Element Analysis is vital reading for engineering professionals and students in all areas of the field.
Structural Reliability
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Author : Yan-Gang Zhao
language : en
Publisher: John Wiley & Sons
Release Date : 2021-03-29
Structural Reliability written by Yan-Gang Zhao and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-03-29 with Technology & Engineering categories.
STRUCTURAL RELIABILITY Discover a new and innovative approach to structural reliability from two authoritative and accomplished authors The subject of structural reliability, which deals with the problems of evaluating the safety and risk posed by a wide variety of structures, has grown rapidly over the last four decades. And while the First-Order Reliability Method is principally used by most textbooks on this subject, other approaches have identified some of the limitations of that method. In Structural Reliability: Approaches from Perspectives of Statistical Moments, accomplished engineers and authors Yan-Gang Zhao and Dr. Zhao-Hui Lu, deliver a concise and insightful exploration of an alternative and innovative approach to structural reliability. Called the Methods of Moment, the authors’ approach is based on the information of statistical moments of basic random variables and the performance function. The Methods of Moment approach facilitates structural reliability analysis and reliability-based design and can be extended to other engineering disciplines, yielding further insights into challenging problems involving randomness. Readers will also benefit from the inclusion of: A thorough introduction to the measures of structural safety, including uncertainties in structural design, deterministic measures of safety, and probabilistic measures of safety An exploration of the fundamentals of structural reliability theory, including the performance function and failure probability A practical discussion of moment evaluation for performance functions, including moment computation for both explicit and implicit performance functions A concise treatment of direct methods of moment, including the third- and fourth-moment reliability methods Perfect for professors, researchers, and graduate students in civil engineering, Structural Reliability: Approaches from Perspectives of Statistical Moments will also earn a place in the libraries of professionals and students working or studying in mechanical engineering, aerospace and aeronautics engineering, marine and offshore engineering, ship engineering, and applied mechanics.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1948
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1948 with Mechanics, Applied categories.
Uncertainty Modeling In Vibration Control And Fuzzy Analysis Of Structural Systems
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Author : Bilal M. Ayyub
language : en
Publisher: World Scientific
Release Date : 1997
Uncertainty Modeling In Vibration Control And Fuzzy Analysis Of Structural Systems written by Bilal M. Ayyub and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
This book gives an overview of the current state of uncertainty modeling in vibration, control, and fuzzy analysis of structural and mechanical systems. It is a coherent compendium written by leading experts and offers the reader a sampling of exciting research areas in several fast-growing branches in this field. Uncertainty modeling and analysis are becoming an integral part of system definition and modeling in many fields. The book consists of ten chapters that report the work of researchers, scientists and engineers on theoretical developments and diversified applications in engineering systems. They deal with modeling for vibration, control, and fuzzy analysis of structural and mechanical systems under uncertain conditions. The book designed for readers who are familiar with the fundamentals and wish to study a particular topic or use the book as an authoritative reference. It gives readers a sophisticated toolbox for tackling modeling problems in mechanical and structural systems in real-world situations. The book is part of a series on Stability, Vibration and Control of Structures, and provides vital information in these areas.
Smart Monitoring Of Rotating Machinery For Industry 4 0
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Author : Fakher Chaari
language : en
Publisher: Springer Nature
Release Date : 2021-08-20
Smart Monitoring Of Rotating Machinery For Industry 4 0 written by Fakher Chaari and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-20 with Technology & Engineering categories.
This book offers an overview of current methods for the intelligent monitoring of rotating machines. It describes the foundations of smart monitoring, guiding readers to develop appropriate machine learning and statistical models for answering important challenges, such as the management and analysis of a large volume of data. It also discusses real-world case studies, highlighting some practical issues and proposing solutions to them. The book offers extensive information on research trends, and innovative strategies to solve emerging, practical issues. It addresses both academics and professionals dealing with condition monitoring, and mechanical and production engineering issues, in the era of industry 4.0.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1979
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Power resources categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1991
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.