Download or read book Methods of Reducing the Size of the Low Order Matrix Polynomial Frequency Domain Parameter Estimation Problem in Modal Analysis written by Kyle D. Dippery and published by . This book was released on 1993 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Topics in Modal Analysis Parameter Identification Volume 8 written by Brandon J. Dilworth and published by Springer Nature. This book was released on 2022-08-03 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics in Modal Analysis & Testing, Volume 8: Proceedings of the 40th IMAC, A Conference and Exposition on Structural Dynamics, 2022, the eighth 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 Modal Analysis, including papers on: Operational Modal & Modal Analysis Applications Experimental Techniques Modal Analysis, Measurements & Parameter Estimation Modal Vectors & Modeling Basics of Modal Analysis Additive Manufacturing & Modal Testing of Printed Parts
Download or read book Parameter Estimation and Signal Processing Techniques for Operational Modal Analysis written by Shashank Chauhan and published by . This book was released on 2008 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Operational Modal Analysis (OMA) is a technique that characterizes a structure/system on the basis of output responses only. It is an emerging field in structural dynamics and has been applied to complex structures that are often difficult to analyze using traditional Experimental Modal Analysis (EMA) techniques. However, the unavailability of input force information, in the case of OMA, makes the overall process significantly more complex as it affects every stage of modal analysis including data acquisition, data processing, parameter estimation, etc. Factors such as these have been responsible for the lack of frequency domain OMA algorithms, inconsistent damping estimation, etc. This research provides useful insights into the OMA techniques by in-depth exploration of the various assumptions under which OMA works and suggests some new signal processing approaches and algorithms to aid in modal parameter estimation using OMA techniques. The dissertation starts with a general literature review of OMA which is followed by presentation of the Unified Matrix Polynomial Approach (UMPA) to the OMA problem. In subsequent chapters, a frequency domain, lower order algorithm and a spatial domain algorithm are presented. Next, new signal processing techniques like Blind Source Separation / Independent Component Analysis (BSS/ICA) are adapted for OMA purposes. The performance of these algorithms is verified by conducting studies on analytical and experimental systems. Intense analytical studies are conducted to understand the effect of the violation of OMA assumptions on OMA modal parameter estimation, especially in view of inconsistent damping estimation. The algorithms developed in this dissertation are then applied to two newly built cable-stayed bridges for assessing their performance in real-life situations. Finally, the research conclusions are presented and recommendations for the future research in this area are given.
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.
Download or read book Proceedings of the 12th International Modal Analysis Conference written by Dominick J. DeMichele and published by . This book was released on 1994 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1995 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 16th International Modal Analysis Conference written by Alfred L. Wicks and published by . This book was released on 1998 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Modal Analysis Conference Exhibit written by and published by . This book was released on 1987 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orthogonal Decomposition Methods for Modal Analysis written by Umar Farooq and published by . This book was released on 2009 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Modal Analysis and Dynamic Component Synthesis Volume 3 Modal Parameter Estimation written by and published by . This book was released on 1987 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the area of modal parameter estimation in terms of reviewing efforts over the past twenty-five years, in developing several new multiple reference methods, and in attempting to provide a common basis and understanding for all of the modal parameter estimation methods developed to date. The review of modal parameter estimation includes a substantial literature review and the presentation of previous methods, such as the Least Squares Complex Exponential, as special cases of general methods, such as the Polyreference Time Domain method. Several new modal parameter estimation methods are developed and presented using consistent theory and nomenclature. The methods that are presented in this manner include: Polyreference Time Domain, Polyreference Frequency Domain, Multiple Reference Ibrahim Time Domain, Multiple Reference Orthogonal Polynomial, and Multi MAC. These methods, in terms of general characteristics, are also compared to other methods such as the Least Squares Complex Exponential, Ibrahim Time Domain, Eigen system Realization Algorithm, and Direct Parameter Estimation methods. These methods are all similar in that the methods involve the decomposition of impulse response functions (time domain), frequency response functions (frequency domain), or forced response patterns (spatial domain) into characteristic functions in the appropriate domain. These characteristic functions are the single degree of freedom information in the respective domain.
Download or read book Experimental Modal Analysis and Dynamic Component Synthesis Modal parameter estimation written by Randall J. Allemang and published by . This book was released on 1987 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the Institution of Engineers Australia written by and published by . This book was released on 1989 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modal Analysis written by Zhi-Fang Fu and published by Elsevier. This book was released on 2001-09-04 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modal Analysis provides a detailed overview of the theory of analytical and experimental modal analysis and its applications. Modal Analysis is the processes of determining the inherent dynamic characteristics of any system and using them to formulate a mathematical model of the dynamic behavior of the system. In the past two decades it has become a major technological tool in the quest for determining, improving and optimizing dynamic characteristics of engineering structures. Its main application is in mechanical and aeronautical engineering, but it is also gaining widespread use in civil and structural engineering, biomechanical problems, space structures, acoustic instruments and nuclear engineering. - The only book to focus on the theory of modal analysis before discussing applications - A relatively new technique being utilized more and more in recent years which is now filtering through to undergraduate courses - Leading expert in the field
Download or read book Modal Testing written by D. J. Ewins and published by John Wiley & Sons. This book was released on 2009-07-20 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: All the steps involved in planning, executing, interpreting and applying the results from a modal test are described in straightforward terms. This edition has brought the previous book up to date by including all the new and improved techniques that have emerged during the 15 years since the first edition was written, especially those of signal processing and modal analysis. New topics are introduced, notable amongst them are the application of modal testing to rotating machinery and the use of scanning laser vibrometer.
Download or read book Modal Analysis Theory and Testing written by Ward Heylen and published by . This book was released on 1998 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interpolatory Methods for Model Reduction written by A. C. Antoulas and published by SIAM. This book was released on 2020-01-13 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamical systems are a principal tool in the modeling, prediction, and control of a wide range of complex phenomena. As the need for improved accuracy leads to larger and more complex dynamical systems, direct simulation often becomes the only available strategy for accurate prediction or control, inevitably creating a considerable burden on computational resources. This is the main context where one considers model reduction, seeking to replace large systems of coupled differential and algebraic equations that constitute high fidelity system models with substantially fewer equations that are crafted to control the loss of fidelity that order reduction may induce in the system response. Interpolatory methods are among the most widely used model reduction techniques, and Interpolatory Methods for Model Reduction is the first comprehensive analysis of this approach available in a single, extensive resource. It introduces state-of-the-art methods reflecting significant developments over the past two decades, covering both classical projection frameworks for model reduction and data-driven, nonintrusive frameworks. This textbook is appropriate for a wide audience of engineers and other scientists working in the general areas of large-scale dynamical systems and data-driven modeling of dynamics.
