Noises are unwanted disturbances that are measured in decibels (dB). These unwanted disturbances affect both health and behavior of human being. To suppress these signals the source of noise has to be identified and noise reduction measures must be taken.
Vibration is a mechanical movement that transfers energy. We human beings have the eagerness to build create and explore. This activity involves vibration. There are various types of vibration monitoring systems available that measure vibration very accurately and even small levels that humans cannot differentiate.
This course provides an understanding of human responses to sound and vibration in the environment, and how such environmental issues are measured and assessed.
This course aims at giving the student a fundamental understanding of the complexity of human response to sound vibration terminologies, vibration monitoring methods and unbalance machinery faults.
WHO SHOULD COMPLETE THIS COURSE
- Mechanical Engineering
- Electrical engineers
- Electronics engineering
- Process Engineering
- Production Managers
- Maintenance Engineers and Supervisors
- Instrumentation and Process Control Technicians
COURSE OUTLINE
HUMAN RESPONSE TO SOUND AND VIBRATION
- Introduction to acoustics
- Sound sources
- Hearing
- Human response to sound and vibration
- “Real world” vibration levels
NOISE AND VIBRATION CONTROL
- Noise and vibration control
ULTRASOUND AND VIBRATION BASICS
- Ultrasound
- Airborne ultrasound
- Ultrasound translator
- Heterodyning
- Ultrasound applications
- Vibration monitoring
- Vibration basics
- Nature of vibration – SHM
WAVE TERMINOLOGY AND VIBRATION SPECTRUM
- Wave terminology
- A Fast Fourier Transform
- Why make a frequency analysis?
- Fourier transform process
- Signal sampling rate
- Anti-Aliasing filters
- Analog to digital conversion
- Windowing
- Resolution, F-Max, bandwidth
- Overall amplitude
VIBRATION TERMINOLOGY
- Vibration terminology
- Which parameter to choose?
MAINTENANCE
- Maintenance Philosophies
- Breakdown maintenance
- Preventive maintenance
- Proactive maintenance
- Classification of machines
- Assigning maintenance strategies
VIBRATION ANALYSIS
- Predictive maintenance principle
- PdM techniques
- Vibration monitoring
- Vibrations – Machinery fault diagnosis
- Vibration standards
- Data acquisition
- Collection of vibration signals
- Velocity pickup – Magnet in coil
- Velocity pickup – coil in magnet
- Velocity transducer features
VIBRATION MONITORING SYSTEMS
- Accelerometer
- Accelerometer: features & Mode types
- Accelerometer mounting
- Displacement probe
- Operational range of sensors
- Vibration monitoring systems
- Hand held vibrometers
- Data collectors/Analyzers – features
- Data management software
- On-line acquisition software
- Knowledge based software
UNBALANCE MACHINERY FAULT
- Machinery fault diagnosis
- Common machinery faults
- Unbalance – static
- Unbalance – couple
- Unbalance – overhung rotors
MISALIGNMENT
- Misalignment
- Angular misalignment
- Bent shaft – angular misalignment
- Parallel misalignment
- Losseness at machine to base plate interface
- Structure looseness
- Resonance
- Modal analysis – experimental
- FEM model
- Rotor rubs
- Oil whirl
- Dry whip
CAVITATION
- Rolling element bearings
- Rolling element bearings – 1
- Rolling element bearings – 2
- Rolling element bearings – 3
- Rolling element bearings – 4
- Gear defects
- Gear – hunting tooth
- Belt sheave misalignment
- Electrical problems
- Rotor defects – eccentric rotor
- Flow related vibrations
