ISO-18436 Vibration Analysis – VCAT III (Mobius Institute)

Course Description

Condition monitoring and ISO standards
Signal processing and data acquisition
Time waveform analysis
Phase analysis
Natural frequencies & resonance
Operating Deflection Shape (ODS)
Modal analysis and intro to FEA
Correcting resonances
Journal bearing fault detection
Electric motor testing
Rolling element bearing fault detection
Pumps, fans and compressors
Gearbox fault detection
Corrective action / Acceptance testing
Review of ISO standards

Have a minimum of 3 years of experience
Have a senior role in the condition monitoring team
Have others report to them to verify diagnoses
Be responsible for the most complex fault conditions
Need to perform complex tests to validate fault conditions (e.g., resonance) and find a solution
Want to be a leader of the vibration team or take a leading role in diagnosing faults and making repair recommendations
Want to understand all data collector options, special test capabilities, all analysis tools and understand the widest range of fault conditions
Seek to become certified to international standards (ISO-18436) by an accredited certification body
Want to understand all condition monitoring technologies, how and when to apply them
Want to understand machine dynamics (natural frequencies, resonance, ODS), how to perform resonance testing and how to correct resonance problems
Use the training and certification as the next step in a rewarding career as a vibration analyst

Course Curriculum

Day 1 ( 8 Hours )

Filters: Low pass, band pass, high pass, band stop
Sampling, aliasing, dynamic range
Signal-to-noise ratio
Resolution, Fmax, data collection time
Averaging: linear, overlap, peak hold, time synchronous
Windowing and leakage
Order tracking
Cross-channel measurements
Correlation and coherence
Collecting data – ensuring you have the correct setup
When should you use time waveform analysis?
Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions Phase analysis
Bubble diagrams
Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions

Day 2 ( 8 Hours )

Natural frequencies and resonances
Mass, stiffness, and damping
SDOF and MDOF
Run-up coast down tests
Bode plots and Nyquist (polar) plots
Impact and bump tests Operating Deflection Shape (ODS) analysis
Can we prove the existence of a natural frequency?
Visualizing vibration
Setting up the job
Collecting phase readings correctly
Interpreting the deflection shape
Using Motion Amplification

Day 3 ( 8 Hours )

How does modal analysis differ from ODS?
How does Finite Element Analysis (FEA) differ from modal analysis
A quick review of the modal testing process Correcting resonances
The effect of mass and stiffness
Beware of nodal points
Adding damping
A ‘trial and error’ approach
A ‘scientific’ approach
Isolation
Tuned absorbers and tuned mass dampers
Why do bearings fail?
Cocked bearing, sliding on the shaft or inside the housing, looseness
EDM and DC motors and VFDs
Bearing frequencies and what to do when you don’t have all the details
The four stages of bearing degradation
Ultrasound
High-frequency detection techniques
Shock Pulse, Spike Energy, Peak Vue, and other techniques
Demodulation/enveloping
Selecting the correct filter settings
Spectrum analysis
Time waveform analysis
Low-speed bearings Journal bearing fault detection
What are journal bearings?
Measuring displacement
Introduction to orbit plots
Using your analyzer to acquire orbit plots
Introduction to centerline diagrams
Eccentricity ratio
Glitch removal
How the orbit changes with pre-load, unbalance, misalignment, instabilities, oil whir and whip

Day 4 ( 8 Hours )

How do motors work?
Diagnosing a range of fault conditions: eccentric rotor, eccentric stator, soft foot, phasing, broken rotor bars, rotor bar, and stator slot pass frequencies
Motor current analysis
Unique fault conditions
Flow turbulence, recirculation, cavitation
Spectrum analysis versus time waveform analysis
Wear particle analysis
Gearmesh, gear assembly phase frequency (and common factors)
Tooth load, broken teeth, gear eccentricity and misalignment, backlash and more

Day 5 ( 6 Hours )

General maintenance repair activities
Review of the balancing process and ISO balance grades
Review of shaft alignment procedures
Defining the program
Setting baselines
Setting alarms: band, envelope/mask, statistical
Setting goals and expectations (avoiding common problems)
Report generation
Reporting success stories
Acceptance testing
Review of ISO standards

ISO-18436 Vibration Analysis – VCAT III (Mobius Institute)

Course Description

What I will learn?

Target Audience

Course Curriculum

Day 1 ( 8 Hours )

Filters: Low pass, band pass, high pass, band stop

Sampling, aliasing, dynamic range

Signal-to-noise ratio

Resolution, Fmax, data collection time

Averaging: linear, overlap, peak hold, time synchronous

Windowing and leakage

Order tracking

Cross-channel measurements

Correlation and coherence

Collecting data – ensuring you have the correct setup

When should you use time waveform analysis?

Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions Phase analysis

Bubble diagrams

Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions

Day 2 ( 8 Hours )

Natural frequencies and resonances

Mass, stiffness, and damping

SDOF and MDOF

Run-up coast down tests

Bode plots and Nyquist (polar) plots

Impact and bump tests Operating Deflection Shape (ODS) analysis

Can we prove the existence of a natural frequency?

Visualizing vibration

Setting up the job

Collecting phase readings correctly

Interpreting the deflection shape

Using Motion Amplification

Day 3 ( 8 Hours )

How does modal analysis differ from ODS?

How does Finite Element Analysis (FEA) differ from modal analysis

A quick review of the modal testing process Correcting resonances

The effect of mass and stiffness

Beware of nodal points

Adding damping

A ‘trial and error’ approach

A ‘scientific’ approach

Isolation

Tuned absorbers and tuned mass dampers

Why do bearings fail?

Cocked bearing, sliding on the shaft or inside the housing, looseness

EDM and DC motors and VFDs

Bearing frequencies and what to do when you don’t have all the details

The four stages of bearing degradation

Ultrasound

High-frequency detection techniques

Shock Pulse, Spike Energy, Peak Vue, and other techniques

Demodulation/enveloping

Selecting the correct filter settings

Spectrum analysis

Time waveform analysis

Low-speed bearings Journal bearing fault detection

What are journal bearings?

Measuring displacement

Introduction to orbit plots

Using your analyzer to acquire orbit plots

Introduction to centerline diagrams

Eccentricity ratio

Glitch removal

How the orbit changes with pre-load, unbalance, misalignment, instabilities, oil whir and whip

Day 4 ( 8 Hours )

How do motors work?

Diagnosing a range of fault conditions: eccentric rotor, eccentric stator, soft foot, phasing, broken rotor bars, rotor bar, and stator slot pass frequencies

Motor current analysis

Unique fault conditions

Flow turbulence, recirculation, cavitation

Spectrum analysis versus time waveform analysis

Wear particle analysis

Gearmesh, gear assembly phase frequency (and common factors)

Tooth load, broken teeth, gear eccentricity and misalignment, backlash and more

Day 5 ( 6 Hours )

General maintenance repair activities

Review of the balancing process and ISO balance grades

Review of shaft alignment procedures

Defining the program