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1) "Vibration" -- As to vibration dampener vi·bra·tion
Pronunciation: vI-'brA-sh&n
Function: noun
1 a : a periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear) b : the action of vibrating : the state of being vibrated or in vibratory motion: as (1) : OSCILLATION (2) : a quivering or trembling motion : QUIVER
2 : an instance of vibration
3 : vacillation in opinion or action : WAVERING
4 a : a characteristic emanation, aura, or spirit that infuses or vitalizes someone or something and that can be instinctively sensed or experienced -- often used in plural b : a distinctive usually emotional atmosphere capable of being sensed -- usually used in plural
- vi·bra·tion·al /-shn&l, -sh&-n&l/ adjective
- vi·bra·tion·less /-sh&n-l&s/ adjective Pronunciation Symbols
Vibration refers to mechanical oscillations about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road. Vibration is occasionally desirable. For example the motion of a tuning fork, the reed in a woodwind instrument or harmonica, or the cone of a loudspeaker is desirable vibration, necessary for the correct functioning of the various devices. More often, vibration is undesirable, wasting energy and creating unwanted sound--noise. For example, the motions of engines, electric motors, or any mechanical device in operation are usually unwanted vibrations. Such vibrations can be caused by imbalances in the rotating parts, uneven friction, the meshing of gear teeth, parts that are dragging together, etc. Careful designs usually minimise unwanted vibrations. The study of sound and vibration are closely related. Sound, pressure waves, are generated by vibrating structures (e.g. vocal cords) and pressure waves can generate vibration of structures (e.g. ear drum). Hence, when trying to reduce noise it is often a problem in trying to reduce vibration. - 1 Types of vibration
- 2 Vibration analysis
- 2.1 Free vibration without damping
- 2.1.1 What causes the system to vibrate under no force?
- 2.2 Free vibration with damping
- 2.3 Forced vibration with damping
- 2.3.1 What causes resonance?
- 2.3.2 Frequency Response Model
- 3 Bibliography
- 4 See also
| Free vibration occurs when a mechanical system is set off with an initial input and then allowed t..."
2) "Dampener" -- As to vibration dampener damp·en
Pronunciation: 'dam-p&n
Function: verb
Inflected Form(s): damp·ened; damp·en·ing /'damp-ni[ng], 'dam-p&-/
transitive verb
1 : to check or diminish the activity or vigor of : DEADEN <the heat dampened our spirits>
2 : to make damp <the shower barely dampened the ground>
3 : DAMP 1c
intransitive verb
1 : to become damp
2 : to become deadened or depressed
- damp·en·er /-n&r/ noun Pronunciation Symbols
A dashpot is a mechanical device, a damper which resists motion via viscous friction. The resulting force is proportional to the velocity, but acts in the opposite direction, slowing the motion and absorbing energy. It is commonly used in conjunction with a spring (which acts to resist displacement). The diagram symbol for a dashpot is: . Two common types of dashpots exist - linear and rotary. Linear dashpots are generally specified by stroke (amount of linear displacement) and damping coefficient (force per velocity). Rotary dashpots will have damping coeffients in torque per angular velocity. A less common type of dashpot is an eddy current damper, which uses a large magnet inside of a tube constructed out of a non-magnetic but conducting material (such as aluminum or copper). Like a common viscous damper, the eddy current damper produces a resistive force proportional to velocity. dashpot in a Stromberg carburetor A dashpot is a common component in a door closer to prevent it from slamming shut. A spring applies force to close the door and the dashpot, implemented by requiring fluid to flow through a narrow channel between reservoirs (often with a size adjustable by a screw), slows down the motion of the door. Dashpots are commonly used in dampers and shock absorbers. The hydraulic cylinder in an automobile shock absorber is a dashpot. - brief description by Julius O. Smith III of Stanford University's CCRMA
- Airpot Frictionless Air Damping Dashpots
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Further Data On Term for vibration dampener
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