Probabilistic Finite Element Model Updating Using Bayesian Statistics

Probabilistic Finite Element Model Updating Using Bayesian Statistics

Author: Tshilidzi Marwala

Publisher: John Wiley & Sons

Published: 2016-09-23

Total Pages: 248

ISBN-13: 111915300X

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Probabilistic Finite Element Model Updating Using Bayesian Statistics: Applications to Aeronautical and Mechanical Engineering Tshilidzi Marwala and Ilyes Boulkaibet, University of Johannesburg, South Africa Sondipon Adhikari, Swansea University, UK Covers the probabilistic finite element model based on Bayesian statistics with applications to aeronautical and mechanical engineering Finite element models are used widely to model the dynamic behaviour of many systems including in electrical, aerospace and mechanical engineering. The book covers probabilistic finite element model updating, achieved using Bayesian statistics. The Bayesian framework is employed to estimate the probabilistic finite element models which take into account of the uncertainties in the measurements and the modelling procedure. The Bayesian formulation achieves this by formulating the finite element model as the posterior distribution of the model given the measured data within the context of computational statistics and applies these in aeronautical and mechanical engineering. Probabilistic Finite Element Model Updating Using Bayesian Statistics contains simple explanations of computational statistical techniques such as Metropolis-Hastings Algorithm, Slice sampling, Markov Chain Monte Carlo method, hybrid Monte Carlo as well as Shadow Hybrid Monte Carlo and their relevance in engineering. Key features: Contains several contributions in the area of model updating using Bayesian techniques which are useful for graduate students. Explains in detail the use of Bayesian techniques to quantify uncertainties in mechanical structures as well as the use of Markov Chain Monte Carlo techniques to evaluate the Bayesian formulations. The book is essential reading for researchers, practitioners and students in mechanical and aerospace engineering.


Finite Element Model Updating in Structural Dynamics

Finite Element Model Updating in Structural Dynamics

Author: Michael Friswell

Publisher: Springer Science & Business Media

Published: 2013-03-09

Total Pages: 305

ISBN-13: 9401585083

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Finite element model updating has emerged in the 1990s as a subject of immense importance to the design, construction and maintenance of mechanical systems and civil engineering structures. This book, the first on the subject, sets out to explain the principles of model updating, not only as a research text, but also as a guide for the practising engineer who wants to get acquainted with, or use, updating techniques. It covers all aspects of model preparation and data acquisition that are necessary for updating. The various methods for parameter selection, error localisation, sensitivity and parameter estimation are described in detail and illustrated with examples. The examples can be easily replicated and expanded in order to reinforce understanding. The book is aimed at researchers, postgraduate students and practising engineers.


View Updating and Relational Theory

View Updating and Relational Theory

Author: Chris Date

Publisher: "O'Reilly Media, Inc."

Published: 2013

Total Pages: 263

ISBN-13: 1449357849

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Views are virtual tables. That means they should be updatable, just as "real" or base tables are. In fact, view updatability isn’t just desirable, it’s crucial, for practical reasons as well as theoretical ones. But view updating has always been a controversial topic. Ever since the relational model first appeared, there has been widespread skepticism as to whether (in general) view updating is even possible. In stark contrast to this conventional wisdom, this book shows how views, just like base tables, can always be updated (so long as the updates don’t violate any integrity constraints). More generally, it shows how updating always ought to work, regardless of whether the target is a base table or a view. The proposed scheme is 100% consistent with the relational model, but rather different from the way updating works in SQL products today. This book can: Help database products improve in the future Help with a "roll your own" implementation, absent such product improvements Make you aware of the crucial role of predicates and constraints Show you how relational products are really supposed to behave Anyone with a professional interest in the relational model, relational technology, or database systems in general can benefit from this book.


Temporal Sampling and Representation Updating

Temporal Sampling and Representation Updating

Author:

Publisher: Academic Press

Published: 2017-11-21

Total Pages: 334

ISBN-13: 0128134518

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Temporal Sampling and Representation Updating, Volume 236, addresses the gap between laboratory studies using static or predictable stimuli and the more complex change that is a characteristic of the real world. Topics in this new volume include a section on Unfolding the time course of emotion perception, Temporal sampling and representation updating for action in interception and grasping tasks, The influence of Cognitive Control and Attention on Temporal Sampling: Lessons from the Attentional Blink, Synchronizing tracking eye movements with the motion of a visual target, and Sampling feature distributions with visual search in heterogeneous displays. - Contains contributions from experts in diverse fields relating to temporal sampling and representation updating - Addresses the way in which we update our representations of the world when it is more unpredictable - Bridges the gap between laboratory studies using static or predictable stimuli and the more complex change that is a characteristic of the real world as it unfolds over time


Finite Element Model Updating Using Computational Intelligence Techniques

Finite Element Model Updating Using Computational Intelligence Techniques

Author: Tshilidzi Marwala

Publisher: Springer Science & Business Media

Published: 2010-06-04

Total Pages: 254

ISBN-13: 1849963231

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FEM updating allows FEMs to be tuned better to reflect measured data. It can be conducted using two different statistical frameworks: the maximum likelihood approach and Bayesian approaches. This book applies both strategies to the field of structural mechanics, using vibration data. Computational intelligence techniques including: multi-layer perceptron neural networks; particle swarm and GA-based optimization methods; simulated annealing; response surface methods; and expectation maximization algorithms, are proposed to facilitate the updating process. Based on these methods, the most appropriate updated FEM is selected, a problem that traditional FEM updating has not addressed. This is found to incorporate engineering judgment into finite elements through the formulations of prior distributions. Case studies, demonstrating the principles test the viability of the approaches, and. by critically analysing the state of the art in FEM updating, this book identifies new research directions.


The Value of Information Updating in New Product Development

The Value of Information Updating in New Product Development

Author: Christian Artmann

Publisher: Springer Science & Business Media

Published: 2009-04-21

Total Pages: 216

ISBN-13: 3540938338

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Managing uncertainty in new product development projects for improved valuation and decision making is one of the most complex and challenging problems in operations management. It is important for any corporation depending on the success of new products and innovations. This work shows how uncertainty can be handled and partly resolved by conducting an information update during the development process. It is one of the first comprehensive models that combine statistical decision theory in form of Bayesian analysis with a real options framework for projects exposed to different sources of uncertainty. The proposed framework makes an important theoretical contribution in addressing this problem, while at the same time being of significant value to managers who face the difficult task of evaluating and managing complex product development projects.