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Course Description
This is
an intensive five-day course that concentrates on the theory behind
vibrations, their characteristics and how these characteristics are used to
analyse problems in equipment. The first day of the course will cover the
theory and characteristics of vibration. The second day will cover the types
of instruments and transducers that are available and will begin the
systematic approach to vibration analysis and how to analyse vibration
spectra. Day three will complete the analysis of spectra and show how to set
up spectral bands and alarm values. Day four is a series of case histories
that the delegates must analyse and make a report on their findings and
there is a written exam, which lasts for 2½ hours.
Prerequisites
This course is intended for vibration analysts with six to nine month's
experience of data collection and who wish to expand their analytical and
problem solving skills. Although there are no formal pre-requisites to this
course, attendance at
Introduction to
Vibration Technology
is recommended for people who are new to vibration analysis.
The course material is generic
and applies to all vendors' equipment. As there will be calculations
involved, delegates will be required to bring a scientific calculator with
them to the course.
Detailed Agenda
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Day 1
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Introduction
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Maintenance Theories and Strategies
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Breakdown, Preventive, Predictive & Proactive Strategies
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Detection, Analysis, Correction & Verification, RCA
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What is Vibration?
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Vibration amplitude response, spring mass & simple time waveform
concept
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Vibration Characteristics
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Frequency
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Frequency from the time waveform; Time domain to frequency
domain
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Complex vibrations; FFT Process
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Amplitude
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The three parameters of Displacement, Velocity & Acceleration
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General useful frequency ranges; Relationship between the three
parameters
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Phase
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Peak Peak-Peak & RMS explained
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How
to use the General Severity Charts
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Understanding the Vibration Spectrum
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Importance of resolution & accuracy; Effects on data collection
time; Effects of overlapping
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Overall vibration and its limitations
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Phase explained
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What is phase? Relative motion; Analysis of phase data
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Operating Deflection Shape Studies; Slow Motion Studies
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Day 2 |
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Overview of Vibration Instrumentation
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Overall level meters; FFT Analysers; Real Time Analysers
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Overview of Vibration Transducers
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Accelerometers; Velocity Transducers; Eddy Current Probes; Shaft
Contact Probes
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Systematic approach to Vibration Analysis
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Diagnosing a machines operating condition through vibration
signature analysis
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Unbalance
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Force, Couple, Dynamic & Overhung Rotor
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Misalignment
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Parallel (Offset), Angular
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Mechanical Looseness
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Belt
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Drives Eccentric, misaligned pulleys
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Eccentricity
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Day 3 |
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Diagnosing machines operating condition through vibration signature
analysis -continued
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Electrical Problems
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Common Electrical Frequencies;
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Estimating number of poles;
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Stator problems;
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Rotor problems
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Gear Drives
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Gear Mesh Frequencies;
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Tooth wear/load;
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Misalignment/Eccentricity of gears;
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How to calculate gear sidebands
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Bearing problems
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How bearings fail;
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Cocked/Misaligned bearings;
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Four stages of defects;
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Role of Spike Energy, ESP, HFD & SPM
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Specifying Spectral Band Set-ups
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Frequency Set up
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Setting alarm levels (Overall & Band)
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Common Pitfalls
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Implementing an Effective Programme
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Day 4 |
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Computer based case histories that have to be analysed and a report
on course of action submitted.
Certification Exam
The exam consists of a combination of written questions,
multiple-choice questions, labelling diagrams and completing tables.
This is a closed book exam, however a booklet of formulae will be
provided for use.
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70%
= Pass
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90%
= Pass with distinction
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