A basic understanding of Vibration analysis of machinery and structures. I prepared this slides for one of my training for clients in the military many years back. Its not updated yet, but gives readers idea of the practical fundamentals of vibration analysis.
3. INTEGRATED RELIABILITY TECHNOLOGY
BAD VIBRATIONS
UNBALANCED WHEEL OF A CAR
VIBRATING PIPES
STRUCTURES AND PLATFORMS
HVAC
GOOD VIBRATIONS
ORGAN PIPES
GUITAR STRINGS
JACK HAMMER
SHAKER CONVEYOR
4. INTEGRATED RELIABILITY TECHNOLOGY
BAD VIBRATIONS
UNBALANCED WHEEL OF A CAR
VIBRATING PIPES
STRUCTURES AND PLATFORMS
HVAC
GOOD VIBRATIONS
ORGAN PIPES
GUITAR STRINGS
JACK HAMMER
SHAKER CONVEYOR
OSIM MASSAGE CHAIR
9. INTEGRATED RELIABILITY TECHNOLOGY
COMMON INDUSTRIAL FAULTS SURVEYED BY
PREDICTNDT
Dynamic Unbalanced 35 %
Misalignment 18 %
Mechanical Looseness 15 %
Resonance 9 %
Bearings 9 %
Gear mesh Faults 5 %
Motor Vibration 2 %
Mech. Looseness 2 %
Rubbing 2 %
Soft Foot 1 %
Isolator Degradation 1 %
Others 1 %
LEGEND
VIBRATION - Faults
Misalignment
Generally any machinery
installed at structure, sensitive
to different Ballast Conditions.
Misalignment will lead to
premature bearing wear.
10. INTEGRATED RELIABILITY TECHNOLOGY
COMMON INDUSTRIAL FAULTS SURVEYED BY
PREDICTNDT
Dynamic Unbalanced 35 %
Misalignment 18 %
Mechanical Looseness 15 %
Resonance 9 %
Bearings 9 %
Gear mesh Faults 5 %
Motor Vibration 2 %
Mech. Looseness 2 %
Rubbing 2 %
Soft Foot 1 %
Isolator Degradation 1 %
Others 1 %
LEGEND
VIBRATION - Faults
Mechanical Looseness
A result of Poor Assembly after an
overhaul.
Preventive Maintenance exercise i.e.
replacement of bearings has also
appeared to be the Root Cause of
Machine Failure.
14. INTEGRATED RELIABILITY TECHNOLOGY
V
A
H
V - VERTICAL
H - HORIZONTAL
A – AXIAL
Data Collection
5 minutes per Machine
MOTOR PUMP
MOTOR
NDE
MOTOR
DE
PUMP
DE
PUMP
NDE
VIBRATION
Measurement Locations
16. INTEGRATED RELIABILITY TECHNOLOGY
VIBRATION ANALYSIS – MARINE HULL VIBRATION, ISO 6954
Guidelines for the
overall evaluation of
vibration in merchant
ships and the effect of
vibration exposure on
humans
Sarafian Salleh
34. INTEGRATED RELIABILITY TECHNOLOGY
COMMON INDUSTRIAL FAULTS SURVEYED BY
PREDICTNDT
VIBRATION – Condition Monitoring
30th Nov 2004
15th Nov 2006
Deterioration of a
gearbox, with
evidence of running
speed harmonics
with rotational
sidebands.
35. INTEGRATED RELIABILITY TECHNOLOGY
VIBRATION – Resolving Resonance
Oil Cooler exhibited high vibration in the
radial direction
Impact test indicated equipment
experiencing resonance condition.
High vibration level of
13mm/sec at rotational
speed of the fan
36. INTEGRATED RELIABILITY TECHNOLOGY
VIBRATION – Baseline & Trend Analysis
Weights have been recommended
to detune the ‘Natural Frequency’
of the Oil Cooler structure.
Vibration level has reduced to
a low of 5 mm/sec rms
43. INTEGRATED RELIABILITY TECHNOLOGY
COMMON INDUSTRIAL FAULTS SURVEYED BY
PREDICTNDT
VIBRATION – Costs Savings
Vibration Baseline – 1000 Rotating Equipment
•Based on Vibration Survey, approximately 10% of
equipment will have severe bearing problems.
•High failure probability due to Dynamic Unbalance
& Misalignment will be detected and eliminated
(AHU,FD Fan & Cooling Tower).
•Vibration analysis will confirm serviceability of all
remaining shipboard equipment to ISO standards
till the next survey.
Reliability = Availability
44. INTEGRATED RELIABILITY TECHNOLOGY
COMMON INDUSTRIAL FAULTS SURVEYED BY
PREDICTNDT
VIBRATION – Costs Savings
Vibration Baseline – 150 shipboard equipment
ChevronTexaco & ExxonMobil are one of our marine
clients that indicated maintenance cost-savings of
approximately 60% off the preventive maintenance
practices.
•Defer unnecessary replacement of parts.
•Revised insurance premiums for assets.
•Planned maintenance & inventory.
•Minimize unforeseen breakdown.
•Timely charter and availability.
45. INTEGRATED RELIABILITY TECHNOLOGY
VIBRATION
APPLICATION OF VIBRATION TO MARINE AND OIL & GAS EQUIPMENT:
•Generator Exciter & Rectifier
•Main Generator
•Emergency Generator
•Shaft Generator
•Main Sea Water Pump
•Main Boiler Feed Water Pump
•General Service Pump
•Fire Pump
•Bilge & Ballast Pump
•Anchor Windlass Power Pack
•Power Pack Motor
•Bow Thruster
•Cargo Pump
•Force Draft Fan
•Main Engine
•Propeller Shaft
•Transfer Pump
•Axial Jet Fans
•Cooling Tower
46. INTEGRATED RELIABILITY TECHNOLOGY
VIBRATION APPLICATION
•MARINE
•OIL & GAS
•PETROCHEMICAL & REFINERY
•WAFER & MICROCHIP FABRICATION
•GEOLOGY
•BUILDING MANAGEMENT
•STRUCTURAL AND CIVIL
•MILITARY
•MANUFACTURING
•POWER GENERATION
•BIOTECH
•AEROSPACE
•EXPLOSIVE AND SHOCK
MISC
TENAGA TIGASarafian Salleh
