Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Continuously Scanning Laser Doppler Vibrometry And Its Application To Vibration Based Structural Damage Detection
Download Continuously Scanning Laser Doppler Vibrometry And Its Application To Vibration Based Structural Damage Detection full books in PDF, epub, and Kindle. Read online Continuously Scanning Laser Doppler Vibrometry And Its Application To Vibration Based Structural Damage Detection ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Continuously Scanning Laser Doppler Vibrometry and Its Application to Vibration-based Structural Damage Detection by : Daming Chen
Download or read book Continuously Scanning Laser Doppler Vibrometry and Its Application to Vibration-based Structural Damage Detection written by Daming Chen and published by . This book was released on 2018 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to investigate a non-contact real-time moving sensor measurement method, i.e., continuously scanning laser Doppler vibrometry (CSLDV), and its application to vibration-based structural damage detection. In a conventional vibration measurement method, a sensor is fixed at a location on a structure surface and measures response of the structure. The spatial resolution of a vibration shape (VS) of the structure obtained by the conventional measurement method is low due to the limited number of sensors that can be attached to the structure. However, in this research, the laser spot from CSLDV continuously moves over a structure surface along a prescribed scan trajectory and measures velocities along the scan trajectory. Since the laser spot continuously moves, the velocities measured by CSLDV include both time- and spatial-domain vibration information of the structure, and a VS of the structure can be obtained from spatial-domain information. Advantages of this measurement method is that a VS can be obtained in a short measurement time and the spatial resolution of the VS can be very dense. An in-house CSLDV system, including a single-point laser Doppler vibrometer, a scanner and a control unit, is built to measure out-of-plane velocities of a structure.
Book Synopsis Laser Doppler Vibrometer for Efficient Structural Health Monitoring by : Vinod K. Sharma
Download or read book Laser Doppler Vibrometer for Efficient Structural Health Monitoring written by Vinod K. Sharma and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research effort in this thesis is devoted to develop techniques to accurately and rapidly identify the location, orientation, and magnitude of the defects by using structural health monitoring concepts that use Laser Doppler Vibrometer as a non-contact sensor with multi-point sensing capability. The first research area addresses the formulation and validation of an innovative Damage Measure that is based on the ratios of the strain energy distributions of the damaged and undamaged structure. The innovations include use of a single set of actuator/sensor pair to excite and detect the responses of a structure for low frequency vibrations as well as guided wave propagation studies. A second new capability is the estimation of the Damage Measure without requiring any knowledge of the undamaged baseline structure. This method is made possible because of the development of these new technologies: Spatial Decimation and Wavenumber/Frequency filtering. The third contribution is to develop analytical models for the structural dynamics of damaged structure and seek solutions that use perturbation methods to detect damage in a plate structure. The fourth contribution is the development of a comprehensive damage detection technique over a wide frequency dynamic range. The fifth topic of research involves automation in Structural Health Monitoring based on the comprehensive Damage Measure formulation. Under the control of software the Scanning Laser Doppler Vibrometer is used to acquire the low frequency vibration mode data for a coarse identification of all the suspect regions of damage using a threshold criterion on the Damage Measure. Each suspect region of damage is further investigated using the high frequency elastic wave propagation to clearly identify the location, orientation, and extent of the damage. The computer control of the Laser Doppler Vibrometer and a quantitative assessment of the damage provide the enabling technologies for the automation proof of concept. Finally the developed techniques of damage detection are successfully demonstrated on practical structures such as a turbine blade in the laboratory and an F-15 vertical tail in field maintenance conditions.
Book Synopsis Computer Vision & Laser Vibrometry, Volume 6 by : Javad Baqersad
Download or read book Computer Vision & Laser Vibrometry, Volume 6 written by Javad Baqersad and published by Springer Nature. This book was released on 2023-11-20 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer Vision & Laser Vibrometry, Volume 6: Proceedings of the 41st IMAC, A Conference and Exposition on Structural Dynamics, 2023, the sixth 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 Computer Vision, Laser Vibrometry and Structural Health Monitoring, including papers on: Novel Techniques Optical Methods, Scanning LDV Methods Photogrammetry & DIC Structural Health Monitoring
Book Synopsis Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8 by : Dario Di Maio
Download or read book Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8 written by Dario Di Maio and published by Springer. This book was released on 2017-03-27 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating Machinery, Hybrid Testing, Vibro-Acoustics & Laser Vibrometry, Volume 8: Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017, the eighth 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 Rotating Machinery, Hybrid Testing, Vibro-Acoustics & Laser Vibrometry, including papers on: Rotating Machinery Vibro-Acoustics Experimental Techniques Advances in Wind Energy Scanning Laser Doppler Vibrometry Methods Hybrid Test Methods
Book Synopsis Rotating Machinery, Vibro-Acoustics & Laser Vibrometry, Volume 7 by : Dario Di Maio
Download or read book Rotating Machinery, Vibro-Acoustics & Laser Vibrometry, Volume 7 written by Dario Di Maio and published by Springer. This book was released on 2018-06-04 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating Machinery, Vibro-Acoustics & Laser Vibrometry, Volume 7: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics, 2018, the seveth volume of nine 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 Rotating Machinery, Hybrid Testing, Vibro-Acoustics & Laser Vibrometry, including papers on: Rotating Machinery Vibro-Acoustics Experimental Techniques Scanning Laser Doppler Vibrometry Methods
Book Synopsis Laser Doppler Vibrometry by : Enrico Primo Tomasini
Download or read book Laser Doppler Vibrometry written by Enrico Primo Tomasini and published by Springer Nature. This book was released on 2020-06-29 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a continuous learning tool for experienced technical staff facing laser vibrometry technology for the first time. The book covers both theoretical aspects and practical applications of laser Doppler vibrometry, and is accompanied by a multimedia presentation that allows the audience to browse the content and come as close as possible to performing real experiments. After a brief introduction, Chapter 2 presents supporting theory, providing general information on light sources, light scattering and interference for a better understanding of the rest of the book. Chapter 3 examines the theory of laser vibrometers, explaining interferometers from an optical perspective and in terms of the related electronics. It also addresses options like tracking filters and different signal demodulation strategies, since these have a significant impact on the practical use of vibrometers. Chapter 4 explores the configurations that are encountered in today’s instrumentation, with a focus on providing practical suggestions on the use of laser vibrometers. Lastly, Chapter 5 investigates metrology for vibration and shock measurements using laser interferometry, and analyses the uncertainty of laser vibrometers in depth.
Book Synopsis Continuous Scanning Laser Doppler Vibrometry for Synchronized Array Measurements by : Muhammad Salman
Download or read book Continuous Scanning Laser Doppler Vibrometry for Synchronized Array Measurements written by Muhammad Salman and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Doppler Vibrometry (LDV) is a non-contact technique for sensing surface vibrations. Traditionally, LDV uses one or more fixed beams to measure the vibrational velocity of specific points and orientations. In order to measure an angular velocity at least two laser beams are required. Instead, this research proposes to develop a Continuous Scanning Laser Doppler Vibrometer (CSLDV)technique, based on a single laser beam continuously sweeping the area of interest using a scanning mirror. Linear scans allow the measurement of normal and angular velocity while circular scans allow the measurement of normal velocity and two angular velocities. The first part of the study analyzes the performance of rigid body models of both the short line and circular scans (
Book Synopsis Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6 by : Christopher Niezrecki
Download or read book Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6 written by Christopher Niezrecki and published by Springer. This book was released on 2019-04-04 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019, the sixth volume of eight 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, including papers on: Novel Techniques Optical Methods, Scanning LDV Methods Photogrammetry & DIC Rotating Machinery
Book Synopsis Structural Health Monitoring (SHM) of Civil Structures by : Gangbing Song
Download or read book Structural Health Monitoring (SHM) of Civil Structures written by Gangbing Song and published by MDPI. This book was released on 2018-04-20 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Structural Health Monitoring (SHM) of Civil Structures" that was published in Applied Sciences
Book Synopsis Vibration-based Techniques For Damage Detection And Localization In Engineering Structures by : Ali Salehzadeh Nobari
Download or read book Vibration-based Techniques For Damage Detection And Localization In Engineering Structures written by Ali Salehzadeh Nobari and published by World Scientific. This book was released on 2018-05-04 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the oil and gas industries, large companies are endeavoring to find and utilize efficient structural health monitoring methods in order to reduce maintenance costs and time. Through an examination of the vibration-based techniques, this title addresses theoretical, computational and experimental methods used within this trend.By providing comprehensive and up-to-date coverage of established and emerging processes, this book enables the reader to draw their own conclusions about the field of vibration-controlled damage detection in comparison with other available techniques. The chapters offer a balance between laboratory and practical applications, in addition to detailed case studies, strengths and weakness are drawn from a broad spectrum of information.
Book Synopsis Experimental Investigation in Vibration Control and Damage Detection of Smart Composites by :
Download or read book Experimental Investigation in Vibration Control and Damage Detection of Smart Composites written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Laser Doppler Vibrometer (LDV) optical instrument purchased under the DURIP grant is used for accurately measuring velocity (and displacement) of vibrating surfaces completely without contact. It is a complete, self-contained area vibration measurement and analysis system. The LDV automatically collects complete vibration data from up to thousands of individual points on a user-defined area. An important feature in scanning vibrometers is the ability to validate and improve the quality of measured data at every scan point. This overcomes problems caused by dark speckles and other unavoidable phenomena present in laser vibrometry. The system purchased is also equipped with Live and Fully Integrated Video Imaging. The equipment is particularly useful at higher frequencies (above Skit) where accelerometers become increasingly inaccurate due to their own dynamic characteristics and influences. A large number of applications that require measurements at very high frequencies and cannot be accomplished using accelerometers include piezoelectric transducers and exciters, NDE flaw detection, rotor blades, disk drive components and micro-sensors and actuators.
Book Synopsis Experimental Techniques, Rotating Machinery, and Acoustics, Volume 8 by : James De Clerck
Download or read book Experimental Techniques, Rotating Machinery, and Acoustics, Volume 8 written by James De Clerck and published by Springer. This book was released on 2015-04-09 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Techniques, Rotating Machinery & Acoustics, Volume 8: Proceedings of the 33rd IMAC, A Conference and Exposition on Structural Dynamics, 2015, the eighth 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 Dynamics, including papers on: Experimental Techniques Processing Modal Data Rotating Machinery Acoustics Adaptive Structures Biodynamics Damping
Book Synopsis Handbook of Experimental Structural Dynamics by : Randall Allemang
Download or read book Handbook of Experimental Structural Dynamics written by Randall Allemang and published by Springer. This book was released on 2022-08-06 with total page 1403 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SEM Handbook of Experimental Structural Dynamics stands as a comprehensive overview and reference for its subject, applicable to workers in research, product design and manufacture, and practice. The Handbook is devoted primarily to the areas of structural mechanics served by the Society for Experimental Mechanics IMAC community, such as modal analysis, rotating machinery, structural health monitoring, shock and vibration, sensors and instrumentation, aeroelasticity, ground testing, finite element techniques, model updating, sensitivity analysis, verification and validation, experimental dynamics sub-structuring, quantification of margin and uncertainty, and testing of civil infrastructure. Chapters offer comprehensive, detailed coverage of decades of scientific and technologic advance and all demonstrate an experimental perspective. Several sections specifically discuss the various types of experimental testing and common practices utilized in the automotive, aerospace, and civil structures industries. · History of Experimental Structural Mechanics · DIC Methods - Dynamic Photogrammetry · LDV Methods · Applied Digital Signal Processing · Introduction to Spectral - Basic Measurements · Structural Measurements - FRF · Random and Shock Testing · Rotating System Analysis Methods * · Sensors Signal Conditioning Instrumentation · Design of Modal Tests · Experimental Modal Methods · Experimental Modal Parameter Evaluation · Operating Modal Analysis Methods * · Analytical Numerical Substructuring · Finite Element Model Correlation · Model Updating · Damping of Materials and Structures · Model Calibration and Validation in Structures* · Uncertainty Quantification: UQ, QMU and Statistics * · Nonlinear System Analysis Methods (Experimental) · Structural Health Monitoring and Damage Detection · Experimental Substructure Modeling · Modal Modeling · Response (Impedance) Modeling · Nonlinear Normal Mode Analysis Techniques (Analytical) * · Modal Modeling with Nonlinear Connection Elements (Analytical) · Acoustics of Structural Systems (VibroAcoustics) * · Automotive Structural Testing * · Civil Structural Testing · Aerospace Perspective for Modeling and Validation · Sports Equipment Testing * · Applied Math for Experimental Structural Mechanics * Chapter Forthcoming Contributions present important theory behind relevant experimental methods as well as application and technology. Topical authors emphasize and dissect proven methods and offer detail beyond a simple review of the literature. Additionally, chapters cover practical needs of scientists and engineers who are new to the field. In most cases, neither the pertinent theory nor, in particular, the practical issues have been presented formally in current academic textbooks. Each chapter in the Handbook represents a ’must read’ for someone new to the subject or for someone returning to the field after an absence. Reference lists in each chapter consist of the seminal papers in the literature. This Handbook stands in parallel to the SEM Handbook of Experimental Solid Mechanics, where this Handbook focuses on experimental dynamics of structures at a macro-scale often involving multiple components and materials where the SEM Handbook of Experimental Solid Mechanics focuses on experimental mechanics of materials at a nano-scale and/or micro-scale.
Book Synopsis On-Line Database of Vibration-Based Damage Detection Experiments by : Richard S. Pappa
Download or read book On-Line Database of Vibration-Based Damage Detection Experiments written by Richard S. Pappa and published by . This book was released on 2000 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a new, on-line bibliographic database of vibration-based damage detection experiments. Publications in the database discuss experiments conducted on actual structures as well as those conducted with simulated data. The database can be searched and sorted in many ways, and it provides photographs of test structures when available. It currently contains 100 publications, which is estimated to be about 5%-10% of the number of papers written to date on this subject. Additional entries are forthcoming. This database is available for public use on the Internet at the following address: http://sdbpappa-mac.larc.nasa.gov. Click on the link named "dd_experiments.fp3" and then type "guest" as the password. No user name is required
Book Synopsis New Techniques in Experimental Structural Dynamics Using a Scanning Laser Vibrometer by :
Download or read book New Techniques in Experimental Structural Dynamics Using a Scanning Laser Vibrometer written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is to develop new techniques in experimental structural dynamics that use a Laser Doppler Vibrometer (LDV) to measure structural vibration. This report discusses use of a fixed laser vibrometer for vibration control experiments and for vibration testing. The laser vibrometer measures velocity directly with a small time and phase delay. Thus use of the laser as a sensor can improve performance of a control system for vibration suppression. Furthermore, the laser can be moved over the surface of the structure to measure the vibration of many points. Experiments are being performed using the laser to measure vibration, and piezoceramic patch actuators to suppress vibration. Laser reflection is being investigated as a new way to study the vibration response of structures. This technique is a very simple way to study vibration and control of structures by mapping the operational deflections onto simple line patterns. The laser is also being used to measure vibration through the glass door of a vacuum oven. The project is to study the effect of high temperatures on piezoceramic materials, structural adhesives, and structural damping treatments. The laser can measure vibration on high temperature surfaces where other sensors would fail.
Book Synopsis Sensors and Instrumentation, Volume 5 by : Evro Wee Sit
Download or read book Sensors and Instrumentation, Volume 5 written by Evro Wee Sit and published by Springer. This book was released on 2016-06-01 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sensors and Instrumentation, Volume 5. Proceedings of the 34th IMAC, A Conference and Exposition on Dynamics of Multiphysical Systems: From Active Materials to Vibroacoustics, 2016, the fift h volume of ten from the Conference brings together contributions to this important area of research and engineering. Th e collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: • Experimental Techniques“/p> • Smart Sensing • Rotational Eff ects • Dynamic Calibration • Systems & Sensing Technologies • Modal Transducers • Novel Excitation Methods
Book Synopsis International Conference on Vibration Measurements by Laser Techniques: Advances and Applications by :
Download or read book International Conference on Vibration Measurements by Laser Techniques: Advances and Applications written by and published by . This book was released on 2006 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
