SlideShare a Scribd company logo
Vibration Control:
Reasoning for controlling
vibration:
We control vibration because it can lead to:
–Fatigue failure
–Fretting wear
–Loosening of fastenings
And can also cause:
–Whole body vibration effects
–Localized physiological effects
–Passenger discomfort
Strategies for vibration
control:
The main strategies of controlling vibration
are:
–Detuning
–Damping/energy dissipation
–Isolation
–Absorbing
Vibration management
strategies:
1.Control the natural frequencies of the system and avoiding
resonance under external excitations.
2.Prevent an excessive response of the system, even at
resonance, by introducing a damping or energy-dissipating
mechanism.
3.Reduce the transmission of the excitation forces from one part
of a machine to another by use of vibration isolators.
4.Reduce the response of the system by adding an auxiliary
mass neutraliser or vibration absorber.
1. Controlling natural
frequencies:
2. Damping
Dampen resulting vibrations
A small amount of damping has a big effect on
amplitudes near resonance (See W3 p8 Graph)
Structure- bolting and riveting
Material (interlayers)
–Tapes
–Gaskets
–Viscoelastic materials
2. Damping
• Damping requires a large Loss factor h
• –A measure of the energy transformed (‘lost’)
per load/unload cycle
• –Much higher in viscoelastic materials like:
• §Polymers- esp. elastomers (rubbers)
• §Foams
• §Naturals- cork, leather
3. Vibration oscillators:
Passive
–an isolator or resilient member (spring and damper
equivalent)
–metal, pneumatic, elastomer springs, cork, felt
–eg Engine mounts
Active
–Sensor, signal processor and actuator
–Continuously trying to reposition the system
3. Vibration oscillators:
Amplification region
–forcing frequencies < than 1.414 wn
–the force transmitted to the foundation is actually greater
than the force applied by the machine
–here the damping does help to reduce the force transmitted.
Isolation region
–forcing frequencies > 1.414 wn
–isolation of the vibration occurs so that the transmitted
force is less than the exciting force.
–amplitude of vibration is low.
–damping actually increases the force transmitted.
–an adequate level of damping is however desirable to protect
against excessive vibration when passing through resonance
3. Vibration oscillators:
Use of vibration oscillators:
• To keep the force transmitted (Ft) small ‘w/wn’ should
be large.
• The isolator should have a natural frequency much
smaller than the operating speed of the machine.
So THEORETICALLY- flexibly mounted engine should be
supported on very weak springs and the damping kept to a
minimum.
REALISTICALLY
–the dead weight alone of a large static mass on weak
springs since would give impossibly large static
deflections.
–such a system would be laterally unstable
§A compromise solution must therefore be adopted which
will depend on the actual problem.
4. Vibration Absorbers:
These are attached spring-mass systems
–‘vibration neutralizer’
–‘dynamic vibration absorber’
Undamped or Damped - They create a different
resonance frequency away from the operating or
problem frequency.
4. Vibration Absorbers:

More Related Content

Similar to Vibration Control.pptxjjjjjjjjjjjjjjjjjjjjj

Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
Yogesh Bansal
 
Ala dom vibartion transmibilty and isolation.pptx sem 6th gtu vibration
Ala dom   vibartion transmibilty and isolation.pptx sem 6th gtu vibrationAla dom   vibartion transmibilty and isolation.pptx sem 6th gtu vibration
Ala dom vibartion transmibilty and isolation.pptx sem 6th gtu vibration
Shrey Patel
 
vibration control on machine seminar ppt
vibration control on machine seminar pptvibration control on machine seminar ppt
vibration control on machine seminar ppt
vipinchaudhary45
 
Acoustics noise reduction
Acoustics noise reductionAcoustics noise reduction
Acoustics noise reduction
Abhishek kumar
 
Practical methods for vibration control of industrial equipment
Practical methods for vibration control of industrial equipmentPractical methods for vibration control of industrial equipment
Practical methods for vibration control of industrial equipment
Maria Romina Angustia
 
Measurement and Control of Vibration
Measurement and Control of VibrationMeasurement and Control of Vibration
Measurement and Control of Vibration
Manokumar Ambalagi
 
Dampingppt
DampingpptDampingppt
Dampingppt
NehaKadam28
 
Nvh(vibration measurement technic and control)
Nvh(vibration measurement technic and control)Nvh(vibration measurement technic and control)
Nvh(vibration measurement technic and control)
MilanKundalia
 
A Review of Design of Shock Absorber Test Rig
A Review of Design of Shock Absorber Test RigA Review of Design of Shock Absorber Test Rig
A Review of Design of Shock Absorber Test Rig
IRJET Journal
 
Introduction to mechanical vibration
Introduction to mechanical vibrationIntroduction to mechanical vibration
Introduction to mechanical vibration
Dinesh Panchal
 
Chapter 1
Chapter 1Chapter 1
Chapter 1
tarmizi abdullah
 
Dynamics of machines-4
Dynamics of machines-4Dynamics of machines-4
Dynamics of machines-4
Godwin Pithalis
 
Active vibration control
Active vibration controlActive vibration control
Active vibration control
Rashmi Bharadwaj
 
Senheiser EW-145-G3 Wireless kit
Senheiser EW-145-G3 Wireless kitSenheiser EW-145-G3 Wireless kit
Senheiser EW-145-G3 Wireless kit
AV ProfShop
 
Ultrasound by Sunil
Ultrasound by SunilUltrasound by Sunil
Ultrasound by Sunil
sunil JMI
 
Dynamics Of Machinery
Dynamics Of MachineryDynamics Of Machinery
Dynamics Of Machinery
Dhrumit Patel
 
Vibration dampers
Vibration dampersVibration dampers
Vibration dampers
SGGDGD
 
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Michael Selvaraj
 
Instrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
Instrumentation Lab. Experiment #12 Report: Lateral Beam VibrationInstrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
Instrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
mohammad zeyad
 
Tsi training
Tsi trainingTsi training
Tsi training
ankitachauhan59
 

Similar to Vibration Control.pptxjjjjjjjjjjjjjjjjjjjjj (20)

Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
Anti Vibration Cradle with Vibration Isolated Pneumatic Air Triflex System-DM...
 
Ala dom vibartion transmibilty and isolation.pptx sem 6th gtu vibration
Ala dom   vibartion transmibilty and isolation.pptx sem 6th gtu vibrationAla dom   vibartion transmibilty and isolation.pptx sem 6th gtu vibration
Ala dom vibartion transmibilty and isolation.pptx sem 6th gtu vibration
 
vibration control on machine seminar ppt
vibration control on machine seminar pptvibration control on machine seminar ppt
vibration control on machine seminar ppt
 
Acoustics noise reduction
Acoustics noise reductionAcoustics noise reduction
Acoustics noise reduction
 
Practical methods for vibration control of industrial equipment
Practical methods for vibration control of industrial equipmentPractical methods for vibration control of industrial equipment
Practical methods for vibration control of industrial equipment
 
Measurement and Control of Vibration
Measurement and Control of VibrationMeasurement and Control of Vibration
Measurement and Control of Vibration
 
Dampingppt
DampingpptDampingppt
Dampingppt
 
Nvh(vibration measurement technic and control)
Nvh(vibration measurement technic and control)Nvh(vibration measurement technic and control)
Nvh(vibration measurement technic and control)
 
A Review of Design of Shock Absorber Test Rig
A Review of Design of Shock Absorber Test RigA Review of Design of Shock Absorber Test Rig
A Review of Design of Shock Absorber Test Rig
 
Introduction to mechanical vibration
Introduction to mechanical vibrationIntroduction to mechanical vibration
Introduction to mechanical vibration
 
Chapter 1
Chapter 1Chapter 1
Chapter 1
 
Dynamics of machines-4
Dynamics of machines-4Dynamics of machines-4
Dynamics of machines-4
 
Active vibration control
Active vibration controlActive vibration control
Active vibration control
 
Senheiser EW-145-G3 Wireless kit
Senheiser EW-145-G3 Wireless kitSenheiser EW-145-G3 Wireless kit
Senheiser EW-145-G3 Wireless kit
 
Ultrasound by Sunil
Ultrasound by SunilUltrasound by Sunil
Ultrasound by Sunil
 
Dynamics Of Machinery
Dynamics Of MachineryDynamics Of Machinery
Dynamics Of Machinery
 
Vibration dampers
Vibration dampersVibration dampers
Vibration dampers
 
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)Ultrasoundtherapy 150201220726-conversion-gate02 (1)
Ultrasoundtherapy 150201220726-conversion-gate02 (1)
 
Instrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
Instrumentation Lab. Experiment #12 Report: Lateral Beam VibrationInstrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
Instrumentation Lab. Experiment #12 Report: Lateral Beam Vibration
 
Tsi training
Tsi trainingTsi training
Tsi training
 

More from joshuaclack73

Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjjPoles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
joshuaclack73
 
Poles and Root Locus Tutoribbbbbbbal.pptx
Poles and Root Locus Tutoribbbbbbbal.pptxPoles and Root Locus Tutoribbbbbbbal.pptx
Poles and Root Locus Tutoribbbbbbbal.pptx
joshuaclack73
 
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjjMulti Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
joshuaclack73
 
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbbMatrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
joshuaclack73
 
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbb
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbbForced Vibrations.pptxbbbbbbbbbbbbbbbbbb
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbb
joshuaclack73
 
Poles and Root Locus Tutorial.hhhhhhpptx
Poles and Root Locus Tutorial.hhhhhhpptxPoles and Root Locus Tutorial.hhhhhhpptx
Poles and Root Locus Tutorial.hhhhhhpptx
joshuaclack73
 
Second Order Systems Qhhhhhhhhuestions.pptx
Second Order Systems Qhhhhhhhhuestions.pptxSecond Order Systems Qhhhhhhhhuestions.pptx
Second Order Systems Qhhhhhhhhuestions.pptx
joshuaclack73
 
Second Order Systems.pptxkkkkkkkkkkkkkjj
Second Order Systems.pptxkkkkkkkkkkkkkjjSecond Order Systems.pptxkkkkkkkkkkkkkjj
Second Order Systems.pptxkkkkkkkkkkkkkjj
joshuaclack73
 
First and Second Order Systems Questions.pptx
First and Second Order Systems Questions.pptxFirst and Second Order Systems Questions.pptx
First and Second Order Systems Questions.pptx
joshuaclack73
 
First and Second Order Sykkkkkkkkstems.pptx
First and Second Order Sykkkkkkkkstems.pptxFirst and Second Order Sykkkkkkkkstems.pptx
First and Second Order Sykkkkkkkkstems.pptx
joshuaclack73
 
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjjWeek 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
joshuaclack73
 
Water Tank Model and Feedback Equation.pptx
Water Tank Model and Feedback Equation.pptxWater Tank Model and Feedback Equation.pptx
Water Tank Model and Feedback Equation.pptx
joshuaclack73
 
First Order System Time Resphhhonse.pptx
First Order System Time Resphhhonse.pptxFirst Order System Time Resphhhonse.pptx
First Order System Time Resphhhonse.pptx
joshuaclack73
 
Modelling and simulation diagrams tutorial.pptx
Modelling and simulation diagrams tutorial.pptxModelling and simulation diagrams tutorial.pptx
Modelling and simulation diagrams tutorial.pptx
joshuaclack73
 
Modelling and Simulation Diajjgrams.pptx
Modelling and Simulation Diajjgrams.pptxModelling and Simulation Diajjgrams.pptx
Modelling and Simulation Diajjgrams.pptx
joshuaclack73
 
Modelling and Simulation jquestions.pptx
Modelling and Simulation jquestions.pptxModelling and Simulation jquestions.pptx
Modelling and Simulation jquestions.pptx
joshuaclack73
 
Modelling and Simulation basics.phhhhptx
Modelling and Simulation basics.phhhhptxModelling and Simulation basics.phhhhptx
Modelling and Simulation basics.phhhhptx
joshuaclack73
 
Matlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptxMatlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptx
joshuaclack73
 
Matlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptxMatlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptx
joshuaclack73
 
Balancing of rotating bodies questions.pptx
Balancing of rotating bodies questions.pptxBalancing of rotating bodies questions.pptx
Balancing of rotating bodies questions.pptx
joshuaclack73
 

More from joshuaclack73 (20)

Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjjPoles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
Poles and Root Locus.pptxjjjjjjjjjjjjjjjjjjjjjjj
 
Poles and Root Locus Tutoribbbbbbbal.pptx
Poles and Root Locus Tutoribbbbbbbal.pptxPoles and Root Locus Tutoribbbbbbbal.pptx
Poles and Root Locus Tutoribbbbbbbal.pptx
 
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjjMulti Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
Multi Degrees of Freedom.pptxjjjjjjjjjjjjjjjjjjjjjj
 
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbbMatrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
Matrix Methods.pptxbbbbbbbbbbbbbbbbbbbbb
 
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbb
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbbForced Vibrations.pptxbbbbbbbbbbbbbbbbbb
Forced Vibrations.pptxbbbbbbbbbbbbbbbbbb
 
Poles and Root Locus Tutorial.hhhhhhpptx
Poles and Root Locus Tutorial.hhhhhhpptxPoles and Root Locus Tutorial.hhhhhhpptx
Poles and Root Locus Tutorial.hhhhhhpptx
 
Second Order Systems Qhhhhhhhhuestions.pptx
Second Order Systems Qhhhhhhhhuestions.pptxSecond Order Systems Qhhhhhhhhuestions.pptx
Second Order Systems Qhhhhhhhhuestions.pptx
 
Second Order Systems.pptxkkkkkkkkkkkkkjj
Second Order Systems.pptxkkkkkkkkkkkkkjjSecond Order Systems.pptxkkkkkkkkkkkkkjj
Second Order Systems.pptxkkkkkkkkkkkkkjj
 
First and Second Order Systems Questions.pptx
First and Second Order Systems Questions.pptxFirst and Second Order Systems Questions.pptx
First and Second Order Systems Questions.pptx
 
First and Second Order Sykkkkkkkkstems.pptx
First and Second Order Sykkkkkkkkstems.pptxFirst and Second Order Sykkkkkkkkstems.pptx
First and Second Order Sykkkkkkkkstems.pptx
 
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjjWeek 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
Week 11 Mini Tasks 123.pptxjjjjjjjjjjjjjjj
 
Water Tank Model and Feedback Equation.pptx
Water Tank Model and Feedback Equation.pptxWater Tank Model and Feedback Equation.pptx
Water Tank Model and Feedback Equation.pptx
 
First Order System Time Resphhhonse.pptx
First Order System Time Resphhhonse.pptxFirst Order System Time Resphhhonse.pptx
First Order System Time Resphhhonse.pptx
 
Modelling and simulation diagrams tutorial.pptx
Modelling and simulation diagrams tutorial.pptxModelling and simulation diagrams tutorial.pptx
Modelling and simulation diagrams tutorial.pptx
 
Modelling and Simulation Diajjgrams.pptx
Modelling and Simulation Diajjgrams.pptxModelling and Simulation Diajjgrams.pptx
Modelling and Simulation Diajjgrams.pptx
 
Modelling and Simulation jquestions.pptx
Modelling and Simulation jquestions.pptxModelling and Simulation jquestions.pptx
Modelling and Simulation jquestions.pptx
 
Modelling and Simulation basics.phhhhptx
Modelling and Simulation basics.phhhhptxModelling and Simulation basics.phhhhptx
Modelling and Simulation basics.phhhhptx
 
Matlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptxMatlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptx
 
Matlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptxMatlab Tasks – Modelling an electronic circuit filter.pptx
Matlab Tasks – Modelling an electronic circuit filter.pptx
 
Balancing of rotating bodies questions.pptx
Balancing of rotating bodies questions.pptxBalancing of rotating bodies questions.pptx
Balancing of rotating bodies questions.pptx
 

Recently uploaded

Meet Dinah Mattingly – Larry Bird’s Partner in Life and Love
Meet Dinah Mattingly – Larry Bird’s Partner in Life and LoveMeet Dinah Mattingly – Larry Bird’s Partner in Life and Love
Meet Dinah Mattingly – Larry Bird’s Partner in Life and Love
get joys
 
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
mul1kv5w
 
240529_Teleprotection Global Market Report 2024.pdf
240529_Teleprotection Global Market Report 2024.pdf240529_Teleprotection Global Market Report 2024.pdf
240529_Teleprotection Global Market Report 2024.pdf
Madhura TBRC
 
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real StoriesAuthenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Steve Greisen
 
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
0md20cgg
 
I Know Dino Trivia: Part 3. Test your dino knowledge
I Know Dino Trivia: Part 3. Test your dino knowledgeI Know Dino Trivia: Part 3. Test your dino knowledge
I Know Dino Trivia: Part 3. Test your dino knowledge
Sabrina Ricci
 
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and SafetyModern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
AITIX LLC
 
Barbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffffBarbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffff
theastras43
 
This Is The First All Category Quiz That I Made
This Is The First All Category Quiz That I MadeThis Is The First All Category Quiz That I Made
This Is The First All Category Quiz That I Made
Aarush Ghate
 
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
9u08k0x
 
DIGIDEVTV A New area of OTT Distribution
DIGIDEVTV  A New area of OTT DistributionDIGIDEVTV  A New area of OTT Distribution
DIGIDEVTV A New area of OTT Distribution
joeqsm
 
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
Mega P
 
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
9u08k0x
 
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdfMatt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
Azura Everhart
 
Divertidamente SLIDE muito lindo e criativo, pptx
Divertidamente SLIDE muito lindo e criativo, pptxDivertidamente SLIDE muito lindo e criativo, pptx
Divertidamente SLIDE muito lindo e criativo, pptx
lunaemel03
 
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdfUnveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
kenid14983
 
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and InspirationOrpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
greendigital
 
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptxFrom Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
Swing Street Radio
 
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting SagaThe Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
greendigital
 
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardom
Young Tom Selleck: A Journey Through His Early Years and Rise to StardomYoung Tom Selleck: A Journey Through His Early Years and Rise to Stardom
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardom
greendigital
 

Recently uploaded (20)

Meet Dinah Mattingly – Larry Bird’s Partner in Life and Love
Meet Dinah Mattingly – Larry Bird’s Partner in Life and LoveMeet Dinah Mattingly – Larry Bird’s Partner in Life and Love
Meet Dinah Mattingly – Larry Bird’s Partner in Life and Love
 
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
 
240529_Teleprotection Global Market Report 2024.pdf
240529_Teleprotection Global Market Report 2024.pdf240529_Teleprotection Global Market Report 2024.pdf
240529_Teleprotection Global Market Report 2024.pdf
 
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real StoriesAuthenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
 
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
 
I Know Dino Trivia: Part 3. Test your dino knowledge
I Know Dino Trivia: Part 3. Test your dino knowledgeI Know Dino Trivia: Part 3. Test your dino knowledge
I Know Dino Trivia: Part 3. Test your dino knowledge
 
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and SafetyModern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
 
Barbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffffBarbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffff
 
This Is The First All Category Quiz That I Made
This Is The First All Category Quiz That I MadeThis Is The First All Category Quiz That I Made
This Is The First All Category Quiz That I Made
 
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
 
DIGIDEVTV A New area of OTT Distribution
DIGIDEVTV  A New area of OTT DistributionDIGIDEVTV  A New area of OTT Distribution
DIGIDEVTV A New area of OTT Distribution
 
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
_7 OTT App Builders to Support the Development of Your Video Applications_.pdf
 
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
 
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdfMatt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
Matt Rife Cancels Shows Due to Health Concerns, Reschedules Tour Dates.pdf
 
Divertidamente SLIDE muito lindo e criativo, pptx
Divertidamente SLIDE muito lindo e criativo, pptxDivertidamente SLIDE muito lindo e criativo, pptx
Divertidamente SLIDE muito lindo e criativo, pptx
 
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdfUnveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
 
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and InspirationOrpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
 
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptxFrom Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
 
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting SagaThe Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
 
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardom
Young Tom Selleck: A Journey Through His Early Years and Rise to StardomYoung Tom Selleck: A Journey Through His Early Years and Rise to Stardom
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardom
 

Vibration Control.pptxjjjjjjjjjjjjjjjjjjjjj

  • 2. Reasoning for controlling vibration: We control vibration because it can lead to: –Fatigue failure –Fretting wear –Loosening of fastenings And can also cause: –Whole body vibration effects –Localized physiological effects –Passenger discomfort
  • 3. Strategies for vibration control: The main strategies of controlling vibration are: –Detuning –Damping/energy dissipation –Isolation –Absorbing
  • 4. Vibration management strategies: 1.Control the natural frequencies of the system and avoiding resonance under external excitations. 2.Prevent an excessive response of the system, even at resonance, by introducing a damping or energy-dissipating mechanism. 3.Reduce the transmission of the excitation forces from one part of a machine to another by use of vibration isolators. 4.Reduce the response of the system by adding an auxiliary mass neutraliser or vibration absorber.
  • 6. 2. Damping Dampen resulting vibrations A small amount of damping has a big effect on amplitudes near resonance (See W3 p8 Graph) Structure- bolting and riveting Material (interlayers) –Tapes –Gaskets –Viscoelastic materials
  • 7. 2. Damping • Damping requires a large Loss factor h • –A measure of the energy transformed (‘lost’) per load/unload cycle • –Much higher in viscoelastic materials like: • §Polymers- esp. elastomers (rubbers) • §Foams • §Naturals- cork, leather
  • 8. 3. Vibration oscillators: Passive –an isolator or resilient member (spring and damper equivalent) –metal, pneumatic, elastomer springs, cork, felt –eg Engine mounts Active –Sensor, signal processor and actuator –Continuously trying to reposition the system
  • 9. 3. Vibration oscillators: Amplification region –forcing frequencies < than 1.414 wn –the force transmitted to the foundation is actually greater than the force applied by the machine –here the damping does help to reduce the force transmitted. Isolation region –forcing frequencies > 1.414 wn –isolation of the vibration occurs so that the transmitted force is less than the exciting force. –amplitude of vibration is low. –damping actually increases the force transmitted. –an adequate level of damping is however desirable to protect against excessive vibration when passing through resonance
  • 10. 3. Vibration oscillators: Use of vibration oscillators: • To keep the force transmitted (Ft) small ‘w/wn’ should be large. • The isolator should have a natural frequency much smaller than the operating speed of the machine. So THEORETICALLY- flexibly mounted engine should be supported on very weak springs and the damping kept to a minimum. REALISTICALLY –the dead weight alone of a large static mass on weak springs since would give impossibly large static deflections. –such a system would be laterally unstable §A compromise solution must therefore be adopted which will depend on the actual problem.
  • 11. 4. Vibration Absorbers: These are attached spring-mass systems –‘vibration neutralizer’ –‘dynamic vibration absorber’ Undamped or Damped - They create a different resonance frequency away from the operating or problem frequency.