Cracked Rotors
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Cracked Rotors
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Author : Nicoló Bachschmid
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-07-12
Cracked Rotors written by Nicoló Bachschmid and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-12 with Science categories.
Cracks can develop in rotating shafts and can propagate to relevant depths without affecting consistently the normal operating conditions of the shaft. In order to avoid catastrophic failures, accurate vibration analyses have to be performed for crack detection. The identification of the crack location and depth is possible by means of a model based diagnostic approach, provided that the model of the crack and the model of the cracked shaft dynamical behavior are accurate and reliable. This monograph shows the typical dynamical behavior of cracked shafts and presents tests for detecting cracks. The book describes how to model cracks, how to simulate the dynamical behavior of cracked shaft, and compares the corresponding numerical with experimental results. All effects of cracks on the vibrations of rotating shafts are analyzed, and some results of a numerical sensitivity analysis of the vibrations to the presence and severity of the crack are shown. Finally the book describes some crack identification procedures and shows some results in model based crack identification in position and depth. The book is useful for higher university courses in mechanical and energetic engineering, but also for skilled technical people employed in power generation industries.
Cracked Rotors
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Author : Nicol Bachschmid
language : en
Publisher:
Release Date : 2010-10-25
Cracked Rotors written by Nicol Bachschmid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-10-25 with categories.
Application Of The Cohesive Zone Model To The Analysis Of Rotors With A Transverse Crack
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Author : Rugerri Toni Liong
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-09-03
Application Of The Cohesive Zone Model To The Analysis Of Rotors With A Transverse Crack written by Rugerri Toni Liong and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-03 with Technology & Engineering categories.
Ein Riss im Rotor ruft eine lokale Steifigkeitsänderung hervor. Die vorliegende Arbeit ermittelt die Steifigkeitsänderung einer angerissenen Welle. Dazu wird ein Kohäsivzonenmodell eingesetzt. Das Modell wurde für die erste Rissöffnungsmode bei ebenem Verzerrungszustand in Abhängigkeit der Mehrachsigkeit des Spannungszustandes (Triaxialität) entwickelt. Außerdemwird das Kohäsivzonenmodell bei einem eindimensionalen Kontinuumsrotor als FE Modell ausgeführt.
Proceedings Of The 10th International Conference On Rotor Dynamics Iftomm
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Author : Katia Lucchesi Cavalca
language : en
Publisher: Springer
Release Date : 2018-08-18
Proceedings Of The 10th International Conference On Rotor Dynamics Iftomm written by Katia Lucchesi Cavalca and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-18 with Technology & Engineering categories.
IFToMM conferences have a history of success due to the various advances achieved in the field of rotor dynamics over the past three decades. These meetings have since become a leading global event, bringing together specialists from industry and academia to promote the exchange of knowledge, ideas, and information on the latest developments in the dynamics of rotating machinery. The scope of the conference is broad, including e.g. active components and vibration control, balancing, bearings, condition monitoring, dynamic analysis and stability, wind turbines and generators, electromechanical interactions in rotor dynamics and turbochargers. The proceedings are divided into four volumes. This second volume covers the following main topics: condition monitoring, fault diagnostics and prognostics; modal testing and identification; parametric and self-excitation in rotor dynamics; uncertainties, reliability and life predictions of rotating machinery; and torsional vibrations and geared systems dynamics.
Dynamics Of Rotors And Foundations
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Author : Erwin Krämer
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Dynamics Of Rotors And Foundations written by Erwin Krämer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Technology & Engineering categories.
Rotordynamics are of great importance in the design, manufacture and assembly of turbomachines as well as in ensuring their safe operation. Also important are the dynamics of the foundation and its interaction with the dynamics of the rotor. This book is divided into four parts. Following a presentation of the basic theory the dynamics of rotors supported on several bearings. The third part describes the dynamics of foundations of turbine line-outs and the calculations for a turbomachine coupled with its foundation. The last part includes a section on estimation procedures, a comprehensive presentation of the theoryand practice of rotors having a transverse crack, a section on the mathematical fundamentals and a description of the computer program used for the examples in the book. The book addresses both the practical engineer and the theoretician and should provide manufacturers, operators, university and polytechnic lecturers and students with an understanding of the vibrations of turbomachines. The results are described in such a way that they can be easily understood and applied.
Proceedings Of Fatigue Crack Paths Fcp 2003 Parma Italy 2003
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Author :
language : en
Publisher: Gruppo Italiano Frattura
Release Date :
Proceedings Of Fatigue Crack Paths Fcp 2003 Parma Italy 2003 written by and has been published by Gruppo Italiano Frattura this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Rotordynamics
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Author : Agnieszka Muszynska
language : en
Publisher: CRC Press
Release Date : 2005-05-20
Rotordynamics written by Agnieszka Muszynska and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-05-20 with Science categories.
As the most important parts of rotating machinery, rotors are also the most prone to mechanical vibrations, which may lead to machine failure. Correction is only possible when proper and accurate diagnosis is obtained through understanding of rotor operation and all of the potential malfunctions that may occur. Mathematical modeling, in particular
Vibratory Condition Monitoring Of Machines
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Author : J. S. Rao
language : en
Publisher: CRC Press
Release Date : 2000
Vibratory Condition Monitoring Of Machines written by J. S. Rao and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Science categories.
Vibratory Condition Monitoring of Machines discusses the basic principles applicable in understanding the vibratory phenomena of rotating and reciprocating machines. It also addresses the defects that influence vibratory phenomenon, instruments and analysis procedures for maintenance, vibration related standards, and the expert systems that help ensure good maintenance programs. The author offers a minimal treatment of the mathematical aspects of the subject, focusing instead on imparting a physical understanding to help practicing engineers develop maintenance programs and operate machines efficiently.
Analytical Methods In Rotor Dynamics
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Author : Andrew D. Dimarogonas
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-02-19
Analytical Methods In Rotor Dynamics written by Andrew D. Dimarogonas and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-19 with Technology & Engineering categories.
The design and construction of rotating machinery operating at supercritical speeds was, in the 1920s, an event of revolutionary importance for the then new branch of dynamics known as rotor dynamics. In the 1960s, another revolution occurred: In less than a decade, imposed by operational and economic needs, an increase in the power of turbomachinery by one order of magnitude took place. Dynamic analysis of complex rotor forms became a necessity, while the importance of approximate methods for dynamic analysis was stressed. Finally, the emergence of fracture mechanics, as a new branch of applied mechanics, provided analytical tools to investigate crack influence on the dynamic behavior of rotors. The scope of this book is based on all these developments. No topics related to the well-known classical problems are included, rather the book deals exclusively with modern high-power turbomachinery.
Vibration Analysis Of Rotors
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Author : Chong-Won Lee
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Vibration Analysis Of Rotors written by Chong-Won Lee and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
This text is intended for use as an advanced course in either rotordynamics or vibration at the graduate level. This text has mostly grown out of the research work in my laboratory and the lectures given to graduate students in the Mechanical Engineering Department, KAIST. The text contains a variety of topics not normally found in rotordynamics or vibration textbooks. The text emphasizes the analytical aspects and is thus quite different from conventional rotordynamics texts; potential readers are expected to have a firm background in elementary rotordynamics and vibration. In most previously published rotordynamics texts, the behavior of simple rotors has been of a primary concern, while more realistic, multi-degree-f-freedom or continuous systems are seldom treated in a rigorous way, mostly due to the difficulty of a mathematical treatment of such complicated systems. When one wanted to gain a deep insight into dynamic phenomena of complicated rotor systems, one has, in the past, either had to rely on computational techniques, such as the transfer matrix and finite element methods, or cautiously to extend ideas learned from simple rotors whose analytical solutions are readily available. The former methods are limited in the interpretation of results, since the calculations relate only to the simulated case, not to more general system behavior. Ideas learned from simple rotors can, fortunately, often be extended to many practical rotor systems, but there is of course no guarantee of their validity.