E-Book, Englisch, 310 Seiten
Kumar Sinha Vibration Analysis, Instruments, and Signal Processing
1. Auflage 2015
ISBN: 978-1-4822-3145-8
Verlag: Taylor & Francis
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)
E-Book, Englisch, 310 Seiten
ISBN: 978-1-4822-3145-8
Verlag: Taylor & Francis
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)
Provides Typical Abstract Representations of Different Steps for Analyzing Any Dynamic System
Vibration and dynamics are common in everyday life, and the use of vibration measurements, tests, and analyses is becoming standard for various applications. Vibration Analysis, Instruments, and Signal Processing focuses on the basic understanding of vibration measurements and analysis. This book covers different areas of vibration measurements and analysis needed in practice, and discusses theory, application, and a variety of methods, in a simplified way. It communicates the fundamental principles of all three facets of vibration-based analysis, and highlights four major points—theory, instruments, experiments, and signal processing.
Useful for everyday work, the book dedicates several chapters to the day-to-day requirements involved in vibration measurements and analysis, and addresses a number of topics useful for many day-to-day analyses and experiments. The book provides experimental examples in each chapter—considering basic theories and analysis methods, instrumentations and signal processing methods, and combined analysis—as well as experimental approaches and case studies. In addition, it dedicates a complete chapter to case studies relating the basic theory, types of instruments and measurements needed, and requisite signal processing that ultimately result in a final diagnosis.
Consisting of ten chapters, this informative text:
- Provides the basic understanding and concept of the vibration theory, mathematical modeling of structures and machines using the finite element (FE) method, and the vibration response computation using the FE model for the load applied
- Discusses a simplified vibration theory through a single degree of freedom (SDOF) system of a mass and a spring
- Introduces the concept of FE modeling at a very basic level through a few simple examples
- Explores how the equation of motion in matrix form for any system can be integrated to solve for the responses at all DOFs due to the time-varying external loadings
Developed for diverse audiences interested in vibration analysis, this book is suitable for every level of student, engineer, and scientist associated with vibration, structural and rotor dynamics, vibration-based diagnosis, and vibration-based condition monitoring.
Zielgruppe
Vibration engineering practioners, researchers and professionals in vibrations and dynamics, vibration theory, structural and rotor dynamics, as well as students/researchers in mechanical/aerospace engineering programs, and engineers in any disciplines working in the area of vibration, structural and rotor dynamics, vibration based condition monitoring and diagnosis.
Autoren/Hrsg.
Fachgebiete
Weitere Infos & Material
Introduction
Introduction
Layout of the Chapters
Basic Theories and Analysis Methods
Single Degree of Freedom (SDOF) System
A Single Degree of Freedom (SDOF) System
Equation of Motion
Damped SDOF System
Forced Vibration
Summary
Introduction to Finite Element Modeling
Basic Concept
Modeling Procedure for Discrete Systems
Extension of FE Modeling Approach to Continuous Systems
Element Mass and Stiffness Matrices
Construction of Global Mass and Stiffness Matrices
Concept of the Formal FE Method
FE Modeling for the Beam in Example
Modal Analysis
Sensitivity of the Element Size
Damping Modeling
Summary
References
Force Response Analysis
Introduction
Direct Integration (DI) Method
Mode Superposition (MS) Method
Excitation at the Base
Summary
Reference
Introduction to Vibration Instruments
Vibration Measurement
Response Measuring Transducers
Displacement Transducers
Velocity Transducers
Acceleration Transducers
External Excitation Instruments
Data Collection and Storage
Concept of Sampling Frequency, fs
Aliasing Effect and the Selection of Sampling Frequency, fs
DAQ Device Bit for ADC
Basics of Signal Processing
Introduction
Nyquist Frequency
Time Domain Signals
Filtering
Quantification of Time Domain Data
Integration of Time Domain Signals
Frequency Domain Signal: Fourier Transformation (FT)
Aliasing Effect
Averaging Process for the Spectrum Computation
Short-Time Fourier Transformation (STFT)
Correlation between Two Signals
Experiments on a SDOF System
References
Experimental Modal Analysis
Introduction
Experimental Procedure
Modal Test and Data Analysis
Example 7.1: Peak Pick Method
Example 7.2: A Clamped-Clamped Beam
Industrial Examples
Summary
References
Finite Element Model Updating
Introduction
Model Updating Methods
Gradient-Based Sensitivity Method
Example 8.1: A Simple Steel Bar
Example 8.2: An Aluminum Cantilever Beam
Summary
References
A Simple Concept on Vibration-Based Condition Monitoring
Introduction
Operational Personnel
Plant Maintenance Engineers
Vibration Experts
Condition Monitoring of Rotating Machines
Normal Operation Condition
Transient Operation Conditions
Instrumenting TG Sets for Condition Monitoring
Types of Faults
Identification of Faults
Condition Monitoring for Other Rotating Machines
Field Balancing
Comments about Model-Based Fault Diagnosis (MFD)
References
Case Studies
Introduction
Roles and Philosophy of Vibration Diagnostic Techniques (VDTs)
Dynamic Qualification due to In-Service Load Condition
Seismic Qualification
Machine Installation and Commissioning
Aging Management for Machines and Structural Components
Summary
References
