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Download or read book Structural Health Monitoring of Wind Turbine Blades Under Fatigue Loads written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Health Monitoring of Wind Turbine Blades written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ACME Wind Turbine Corporation has contacted our dynamic analysis firm regarding structural health monitoring of their wind turbine blades. ACME has had several failures in previous years. Examples are shown in Figure 1. These failures have resulted in economic loss for the company due to down time of the turbines (lost revenue) and repair costs. Blade failures can occur in several modes, which may depend on the type of construction and load history. Cracking and delamination are some typical modes of blade failure. ACME warranties its turbines and wishes to decrease the number of blade failures they have to repair and replace. The company wishes to implement a real time structural health monitoring system in order to better understand when blade replacement is necessary. Because of warranty costs incurred to date, ACME is interested in either changing the warranty period for the blades in question or predicting imminent failure before it occurs. ACME's current practice is to increase the number of physical inspections when blades are approaching the end of their fatigue lives. Implementation of an in situ monitoring system would eliminate or greatly reduce the need for such physical inspections. Another benefit of such a monitoring system is that the life of any given component could be extended since real conditions would be monitored. The SHM system designed for ACME must be able to operate while the wind turbine is in service. This means that wireless communication options will likely be implemented. Because blade failures occur due to cyclic stresses in the blade material, the sensing system will focus on monitoring strain at various points.
Download or read book Wind Turbine Blade Fatigue Tests written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents experimental results of several structural health monitoring (SHM) methods applied to a 9-meter CX-100 wind turbine blade that underwent fatigue loading. The blade was instrumented with piezoelectric transducers, accelerometers, acoustic emission sensors, and foil strain gauges. It underwent harmonic excitation at its first natural frequency using a hydraulically actuated resonant excitation system. The blade was initially excited at 25% of its design load, and then with steadily increasing loads until it failed. Various data were collected between and during fatigue loading sessions. The data were measured over multiple frequency ranges using a variety of acquisition equipment, including off-the-shelf systems and specially designed hardware developed by the authors. Modal response, diffuse wave-field transfer functions, and ultrasonic guided wave methods were applied to assess the condition of the wind turbine blade. The piezoelectric sensors themselves were also monitored using a sensor diagnostics procedure. This paper summarizes experimental procedures and results, focusing particularly on fatigue crack detection, and concludes with considerations for implementing such damage identification systems, which will be used as a guideline for future SHM system development for operating wind turbine blades.
Author : R.P.L. Nijssen
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128089172
Total Pages : 43 pages
Book Rating : 4.1/5 (28 download)
Download or read book Advances in wind turbine blade design and materials written by R.P.L. Nijssen and published by Elsevier Inc. Chapters. This book was released on 2013-10-31 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composites have been the material of choice for wind turbine blade construction for several decades. This chapter explains why. It also shows how wind turbine blade materials and our understanding of their fatigue behaviour have developed recently, and the gaps that still exist in the knowledge. The chapter discusses why fatigue is a predominant design driver for wind turbine blades. The main structural elements of the blade (load bearing components and aerodynamic shell) are considered in terms of material and design requirements, and fundamental research questions are addressed. Finally, there is a comment on current and future trends, as well as a list of recommended reading.
Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (682 download)
Download or read book Structural Health Monitoring Static Test of a Wind Turbine Blade written by and published by . This book was released on 2002 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring research is being performed by NCA & T, the NREL and Sandia Laboratories to develop a''Smart Blade'' with an embedded sensor system integrated into the blade by the manufacturer to continuously monitor the condition of the loading in the blade and reduce or prevent fatigue damage of the blade. This will reduce maintenance costs and improve the reliability of wind power.
Author : Mannur J. Sundaresan
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (496 download)
Download or read book Structural Health Monitoring Static Test of a Wind Turbine Blade, August 1999 written by Mannur J. Sundaresan and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wieslaw Ostachowicz
Publisher : Springer Science & Business Media
ISBN 13 : 3709113903
Total Pages : 433 pages
Book Rating : 4.7/5 (91 download)
Download or read book New Trends in Structural Health Monitoring written by Wieslaw Ostachowicz and published by Springer Science & Business Media. This book was released on 2013-01-18 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: A motivation for structural health monitoring. Structural health monitoring of aircraft structures. Vibration-based damage diagnosis and monitoring of external loads.Statistical time series methods for vibration based structural health monitoring. Fiber optic sensors. Damage localisation using elastic waves propagation methods experimental techniques. Application for wind turbine blades. Experts actively working in structural health monitoring and control techniques present the current research, areas of application and tendencies for the future of this technology, including various design issues involved. Examples using some of the latest hardware and software tools, experimental data from small scale laboratory demonstrators and measurements made on real structures illustrate the book. It will be a reference for professionals and students in the areas of engineering, applied natural sciences and engineering management.
Download or read book Structural Damage Identification in Wind Turbine Blades Using Piezoelectric Active Sensing with Ultrasonic Validation written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper gives a brief overview of a new project at LANL in structural damage identification for wind turbines. This project makes use of modeling capabilities and sensing technology to understand realistic blade loading on large turbine blades, with the goal of developing the technology needed to automatically detect early damage. Several structural health monitoring (SHM) techniques using piezoelectric active materials are being investigated for the development of wireless, low power sensors that interrogate sections of the wind turbine blade using Lamb wave propagation data, frequency response functions (FRFs), and time-series analysis methods. The modeling and sensor research will be compared with extensive experimental testing, including wind tunnel experiments, load and fatigue tests, and ultrasonic scans - on small- to mid-scale turbine blades. Furthermore, this study will investigate the effect of local damage on the global response of the blade by monitoring low-frequency response changes.
Author : Fu-Kuo Chang
Publisher : DEStech Publications, Inc
ISBN 13 : 160595053X
Total Pages : 1397 pages
Book Rating : 4.6/5 (59 download)
Download or read book Structural Health Monitoring 2011 written by Fu-Kuo Chang and published by DEStech Publications, Inc. This book was released on 2011 with total page 1397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2-volume set of books, comprising over 2,700 total pages, presents 325 fully original presentations on recent advances in structural health monitoring, as applied to commercial and military aircraft (manned and unmanned), high-rise buildings, wind turbines, civil infrastructure, power plants and ships. One general theme of the books is how SHM can be used for condition-based maintenance, with the goal of developing prediction-based systems, designed to save money over the life of vehicles and structures. A second theme centers on technologies for developing systems comprising sensors, diagnostic data and decision-making, with a focus on intelligent materials able to respond to damage and in some cases repair it. Finally the books discuss the relation among data, data interpretation and decision-making in managing a wide variety of complex structures and vehicles. More recent technologies discussed in the books include SHM and environmental effects, energy harvesting, non-contact sensing, and intelligent networks.Material in these books was first presented in September, 2011 at a conference held at Stanford University and sponsored by the Air Force Office of Scientific Research, the Army Research Office, the Office of Naval Research and the National Science Foundation. Some of the highlights of the books include: SHM technologies for condition-based maintenance (CBM) and predictive maintenance Verification, validation, qualification, data mining, prognostics systems for decision-making Structural health, sensing and materials in closed-loop intelligent networks Military and aerospace, bioinspired sensors, wind turbines, monitoring with MEMS, damage sensing, hot spot monitoring, SHM and ships, high-rise structures Includes a fully-searchable CD-ROM displaying many figures and charts in full color
Author : Povl Brondsted
Publisher : Elsevier
ISBN 13 : 0857097288
Total Pages : 485 pages
Book Rating : 4.8/5 (57 download)
Download or read book Advances in Wind Turbine Blade Design and Materials written by Povl Brondsted and published by Elsevier. This book was released on 2013-10-31 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind energy is gaining critical ground in the area of renewable energy, with wind energy being predicted to provide up to 8% of the world’s consumption of electricity by 2021. Advances in wind turbine blade design and materials reviews the design and functionality of wind turbine rotor blades as well as the requirements and challenges for composite materials used in both current and future designs of wind turbine blades. Part one outlines the challenges and developments in wind turbine blade design, including aerodynamic and aeroelastic design features, fatigue loads on wind turbine blades, and characteristics of wind turbine blade airfoils. Part two discusses the fatigue behavior of composite wind turbine blades, including the micromechanical modelling and fatigue life prediction of wind turbine blade composite materials, and the effects of resin and reinforcement variations on the fatigue resistance of wind turbine blades. The final part of the book describes advances in wind turbine blade materials, development and testing, including biobased composites, surface protection and coatings, structural performance testing and the design, manufacture and testing of small wind turbine blades. Advances in wind turbine blade design and materials offers a comprehensive review of the recent advances and challenges encountered in wind turbine blade materials and design, and will provide an invaluable reference for researchers and innovators in the field of wind energy production, including materials scientists and engineers, wind turbine blade manufacturers and maintenance technicians, scientists, researchers and academics. Reviews the design and functionality of wind turbine rotor blades Examines the requirements and challenges for composite materials used in both current and future designs of wind turbine blades Provides an invaluable reference for researchers and innovators in the field of wind energy production
Author : Arnaud Deraemaeker
Publisher : Springer Science & Business Media
ISBN 13 : 3709103991
Total Pages : 308 pages
Book Rating : 4.7/5 (91 download)
Download or read book New Trends in Vibration Based Structural Health Monitoring written by Arnaud Deraemaeker and published by Springer Science & Business Media. This book was released on 2012-01-28 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of articles covering the six lecture courses given at the CISM School on this topic in 2008. It features contributions by established international experts and offers a coherent and comprehensive overview of the state-of-the art research in the field, thus addressing both postgraduate students and researchers in aerospace, mechanical and civil engineering.
Author : Fabio Casciati
Publisher : DEStech Publications, Inc
ISBN 13 : 1605950246
Total Pages : 1425 pages
Book Rating : 4.6/5 (59 download)
Download or read book Fifth European Workshop on Structural Health Monitoring 2010 written by Fabio Casciati and published by DEStech Publications, Inc. This book was released on 2010 with total page 1425 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Niezrecki
Publisher : Springer
ISBN 13 : 3319541099
Total Pages : 99 pages
Book Rating : 4.3/5 (195 download)
Download or read book Structural Health Monitoring & Damage Detection, Volume 7 written by Christopher Niezrecki and published by Springer. This book was released on 2017-03-20 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Health Monitoring & Damage Detection, Volume 7: Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017, the seventh volume of ten from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Health Monitoring & Damage Detection, including papers on: Structural Health Monitoring Damage Detection System Identification Active Controls
Author : M H Ferri Aliabadi
Publisher : World Scientific
ISBN 13 : 1786343940
Total Pages : 286 pages
Book Rating : 4.7/5 (863 download)
Download or read book Structural Health Monitoring For Advanced Composite Structures written by M H Ferri Aliabadi and published by World Scientific. This book was released on 2017-12-18 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) is a relatively new and alternative way of non-destructive inspection (NDI). It is the process of implementing a damage detection and characterization strategy for composite structures. The basis of SHM is the application of permanent fixed sensors on a structure, combined with minimum manual intervention to monitor its structural integrity. These sensors detect changes to the material and/or geometric properties of a structural system, including changes to the boundary conditions and system connectivity, which adversely affect the system's performance.This book's primary focus is on the diagnostics element of SHM, namely damage detection in composite structures. The techniques covered include the use of Piezoelectric transducers for active and passive Ultrasonics guided waves and electromechanical impedance measurements, and fiber optic sensors for strain sensing. It also includes numerical modeling of wave propagation in composite structures. Contributed chapters written by leading researchers in the field describe each of these techniques, making it a key text for researchers and NDI practitioners as well as postgraduate students in a number of specialties including materials, aerospace, mechanical and computational engineering.
Author : Kenneth C. Burnham
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Structural Health Monitoring of Wind Turbine Blades Using Guided Wave NDT Technique written by Kenneth C. Burnham and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind energy is an increasingly important contributor of power within the renewable energy sector. In the year to 2012, wind generation within the United Kingdom (UK) increased 40% meeting 6% of the UK's national electricity demand. The UK is committed to providing 15% of its energy from renewable resources by 2020. Currently, the UK has approximately 40% of Europe's entire wind resource with significant potential for development of both on and offshore wind. In recent years, the number of reports on defective blades contributing towards turbine failure has grown. Blade manufacturers have privately reported a recurring problem with the spar cap - a critical strengthening component - which when weakened by damage, hastens the onset of operational failure. The contents of this thesis consider composite materials used within the blade and the detection techniques appropriate for in-field implementation. Application of Guided Waves, in particular Lamb waves, suits the typical dimensions of the blade composite structure. Experiments were conducted to understand the characteristics of Lamb wave modes within glass fibre reinforced plastic (GFRP) to assess attenuation levels; modal propagation; and dispersion with respect to fibre orientation. Finite Element Analysis (FEA) was used to observe material characteristics and discern possible modes of wave propagation. To exploit the directional qualities of GFRP, directional Macro Fibre Composite (MFC) sensors were applied to a wind turbine blade providing low-profile, light-weight, durability and conformability with sufficient sensitivity to detect elastic disturbance over large areas. Parametric monitoring of GFRP samples under loading identified tensile stress from defect onset. Cross correlation and sliding-window correlation signal processing techniques on recorded data from the applied sparse array identified the onset of fibre damage using Guided wave modes. This technique was able to identify modal changes to specific defects providing the prospect for in-situ blade monitoring.
Author : Fu-Kuo Chang
Publisher : DEStech Publications, Inc
ISBN 13 : 9781932078206
Total Pages : 1592 pages
Book Rating : 4.0/5 (782 download)
Download or read book Structural Health Monitoring 2003 written by Fu-Kuo Chang and published by DEStech Publications, Inc. This book was released on 2003 with total page 1592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Important new information on sensors, monitoring, prognosis, networking, and planning for safety and maintenance.
Author : N. Rajic
Publisher : Materials Research Forum LLC
ISBN 13 : 1644902443
Total Pages : 396 pages
Book Rating : 4.6/5 (449 download)
Download or read book Structural Health Monitoring written by N. Rajic and published by Materials Research Forum LLC. This book was released on 2023-04-25 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents the proceedings of the 9th Asia-Pacific Workshop on Structural Health Monitoring. With the increasing worldwide emphasis on asset sustainability, there is a trend toward Condition-Based Maintenance (CBM) and Reliability-Centred Maintenance (RCM). Both approaches require diagnostic systems which detect damage and monitor structural health and/or prognostic systems that predict the future health of a structure. Keywords: Vibration Monitoring, Railway Bridge, Strain-based Damage, Turbine Blades, Crack and Temperature Sensing, Bone Degradation, Prefabricated Concrete Frame, Impact Damage in Composites, Ferroelectric Single Crystals, Evaluation of Human Injury, Automatic Damage Assessment, Metal-Composite Plates, Osseointegration, High-rise Buildings, Acoustic Emission Source. Earthquake, Wind Turbine Rotor Blades. Smart Cables, Thermal Damages, Cement Materials, Multi-parameter Monitoring, Petri Net Model, Maintenance Strategies, Load Bearing Antenna, Thin Metal Joints, Aerospace Structure.
