Login | Signup now       

Guest

 Click to see how  

HOME | VIDEOS | DOCUMENTS | COLLECTIONS | UPLOAD | BROADCAST | MY ACCOUNT | FEEDBACK | ABOUT

Share  Title: Damped and Driven Oscillations - Resonance

 
iConnect (Beta)   |  Like   |    Sponsor  |   Comment   |    Report  

Related Profiles

If you are an author or an inventor or an individual related to the work displayed in this video, you can click on the 'add me as' button to link your researchusa profile to this entry. Doing so automatically puts you on the iConnect network bringing great visibility to all your related work.

    
 
Article

View Cross Ref (Beta)

Your Edit is Valuable. Editor's names show on Edit pannel.Edit this article  

 
[var.doi;ope=max:15000;onformat=makelink;htmlconv=no]

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes is used to be synonymous with "oscillation." Oscillations occur not only in physical systems but also in biological systems and in human society.

The simplest mechanical oscillating system is a mass attached to a linear spring subject to no other forces. Such a system may be approximated on an air table or ice surface. The system is in an equilibrium state when the spring is static. If the system is displaced from the equilibrium, there is a net restoring force on the mass, tending to bring it back to equilibrium. However, in moving the mass back to the equilibrium position, it has acquired momentum which keeps it moving beyond that position, establishing a new restoring force in the opposite sense. If a constant force such as gravity is added to the system, the point of equilibrium is shifted. The time taken for an oscillation to occur is often referred to as the oscillatory period. The specific dynamics of this spring-mass system are described mathematically by the simple harmonic oscillator and the regular periodic motion is known as simple harmonic motion. In the spring-mass system, oscillations occur because, at the static equilibrium displacement, the mass has kinetic energy which is converted into potential energy stored in the spring at the extremes of its path. The spring-mass system illustrates some common features of oscillation, namely the existence of an equilibrium and the presence of a restoring force which grows stronger the further the system deviates from equilibrium. The harmonic oscillator offers a model of many more complicated types of oscillation and can be extended by the use of Fourier analysis. In real-world systems, the second law of thermodynamics dictates that there is some continual and inevitable conversion of energy into the thermal energy of the environment. Thus, oscillations tend to decay (become "damped") with time unless there is some net source of energy into the system. The simplest description of this decay process can be illustrated by oscillation decay of the harmonic oscillator.In addition, an oscillating system may be subject to some external force (often sinusoidal), as when an AC circuit is connected to an outside power source. In this case the oscillation is said to be driven. Some systems can be excited by energy transfer from the environment. This transfer typically occurs where systems are embedded in some fluid flow. For example, the phenomenon of flutter in aerodynamics occurs when an arbitrarily small displacement of an aircraft wing (from its equilibrium) results in an increase in the angle of attack of the wing on the air flow and a consequential increase in lift coefficient, leading to a still greater displacement. At sufficiently large displacements, the stiffness of the wing dominates to provide the restoring force that enables an oscillation.

 
[var.addon_information]

 
Related Documents
Rayleigh criteria and Combustion Instability
Combustion Instability in Liquid Rocket Engines
The Role of Density Gradient in Liquid Rocket Engine Combustion Instability
Girlkultur Mass Culture in Weimar Germany
Laminar Separation Bubble
A Technical Essay on the Gyroplane
 
Member Documents
[var.mwpaper;htmlconv=no;]
 

Keywords
Damped  Driven  Oscillations  Resonance  Sound  
 
 About This Video
 
 Subject Physics
 Category Demonstration
 Duration 00:08:41
 Views 2262
 Added 24-08-09
 Contributor    reberg
 Add to Favourites
 Report Abuse
 
 Related Videos
 See More

Damped

 RunTime  moderate
 Uploaded  26-06-12
 Views  441
   
 Damped Oscillations

Overdamped

 RunTime  moderate
 Uploaded  26-06-12
 Views  454
   
 Overdamped and Critically...

Sound

 RunTime  00:03:43
 Uploaded  25-08-09
 Views  2116
   
 Sound Resonance

Resonance

 RunTime  00:10:41
 Uploaded  03-09-09
 Views  2155
   
 Resonance Curves

Beats

 RunTime  00:04:44
 Uploaded  26-08-09
 Views  2173
   
 Beats

Coupled

 RunTime  00:05:52
 Uploaded  25-08-09
 Views  2182
   
 Coupled Oscillations

Resonance

 RunTime  00:02:05
 Uploaded  30-04-08
 Views  2155
   
 Resonance

The

 RunTime  00:10:32
 Uploaded  26-08-09
 Views  2226
   
 The Overtone Series

Rijke

 RunTime  moderate
 Uploaded  26-06-12
 Views  458
   
 Rijke Tube

Chladni

 RunTime  00:08:48
 Uploaded  03-09-09
 Views  2297
   
 Chladni Plates

Standing

 RunTime  00:07:51
 Uploaded  26-08-09
 Views  2163
   
 Standing Sound Waves

Structural

 RunTime  00:04:12
 Uploaded  28-12-07
 Views  2419
   
 Structural Collapse: the ...

Vocal

 RunTime  00:08:00
 Uploaded  12-11-09
 Views  2264
   
 Vocal Formants

Frequency,

 RunTime  00:09:30
 Uploaded  24-08-09
 Views  2139
   
 Frequency, Amplitude and ...

Standing

 RunTime  00:06:01
 Uploaded  27-08-09
 Views  2287
   
 Standing waves in a Strin...

RLC

 RunTime  moderate
 Uploaded  26-06-12
 Views  414
   
 RLC Circuit Oscillations

The

 RunTime  00:02:09
 Uploaded  26-12-07
 Views  2245
   
 The physics of sound

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  2319
   
 Speed of Sound

 Member Videos
 See More

Sound

 RunTime  00:03:11
 Uploaded  26-08-09
 Views  3038
   
 Sound Refraction - Sound ...

Audio

 RunTime  00:09:16
 Uploaded  12-11-09
 Views  2576
   
 Audio Spectrograms

AM,

 RunTime  00:11:47
 Uploaded  03-09-09
 Views  2572
   
 AM, FM and Balanced Modul...

Shive

 RunTime  00:08:29
 Uploaded  26-08-09
 Views  2552
   
 Shive Wave Machine - Stan...

Sound

 RunTime  00:04:44
 Uploaded  25-08-09
 Views  2482
   
 Sound Reflection from Con...

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  2421
   
 Sound Propagation in Vacu...

Standing

 RunTime  00:09:58
 Uploaded  03-09-09
 Views  2365
   
 Standing Waves in Air Col...

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  2319
   
 Speed of Sound

Chladni

 RunTime  00:08:48
 Uploaded  03-09-09
 Views  2297
   
 Chladni Plates

Standing

 RunTime  00:06:01
 Uploaded  27-08-09
 Views  2287
   
 Standing waves in a Strin...

Vocal

 RunTime  00:08:00
 Uploaded  12-11-09
 Views  2264
   
 Vocal Formants

Damped

 RunTime  00:08:41
 Uploaded  24-08-09
 Views  2263
   
 Damped and Driven Oscilla...

 

 

Comments | Queries | Clarifications