# What is meant by damped vibration?

A

**vibration**or**oscillation**occurring in a**damping**medium is called**damped oscillation**. As a result a portion of the energy of the vibrator is converted to heat energy and thus the amplitude of the**vibration**gradually decreases logarithmically over time.A.

### What is critically damped oscillation?

**Critical damping**provides the quickest approach to zero amplitude for a

**damped oscillator**. With less

**damping**(underdamping) it reaches the zero position more quickly, but

**oscillates**around it. With more

**damping**(overdamping), the approach to zero is slower.

#### What is an undamped oscillation?

not**damped**or dampened; undiminished, as in energy, vigor, etc.:**undamped**spirits. Physics. (of an**oscillation**) having constant or increasing amplitude.#### What is damping of oscillations?

While simple harmonic motion oscillates with only the restoring force acting on the system,**damped**harmonic motion experiences friction. In many vibrating systems the frictional force F_{f}can be modeled as being proportional to the velocity v of the object: F_{f}= −cv, where c is called the viscous**damping**coefficient.#### What do you mean by forced oscillations?

Free**Oscillations**,**Forced Oscillations**and Resonance. If no more external forces are applied to the system it is a free**oscillator**. If a force is continually or repeatedly applied to keep the**oscillation**going, it is a**forced oscillator**.

B.

### What is underdamped and overdamped?

The system returns (exponentially decays) to equilibrium without oscillating. Critically damped. The system returns to equilibrium as quickly as possible without oscillating.

**Underdamped**. The system oscillates (at reduced frequency compared to the**undamped**case) with the amplitude gradually decreasing to zero.#### What is Overdamped circuit?

An**RLC circuit**is an electrical**circuit**consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel. Introducing the resistor increases the decay of these oscillations, which is also known as damping. The resistor also reduces the peak resonant frequency.#### What is damping and why does it occur?

Viscous**damping**is caused by such energy losses as**occur**in liquid lubrication between moving parts or in a fluid forced through a small opening by a piston, as in automobile shock absorbers. The motion of a vibrating body is also checked by its friction with the gas or liquid through which it moves.#### What is second order system?

**System Order**. The**order**of a dynamic**system**is the**order**of the highest derivative of its governing differential equation. Equivalently, it is the highest power of in the denominator of its transfer function. The important properties of first-,**second**-, and higher-**order systems**will be reviewed in this section.

C.

### What are the causes of damping in an oscillator?

Viscous

**damping**is**caused**by such energy losses as occur in liquid lubrication between moving parts or in a fluid forced through a small opening by a piston, as in automobile shock absorbers. The motion of a vibrating body is also checked by its friction with the gas or liquid through which it moves.#### How do the dampers work?

Enter the shock absorber, or snubber, a device that controls unwanted spring motion through a process known as**dampening**. Shock absorbers slow down and reduce the magnitude of vibratory motions by turning the kinetic energy of suspension movement into heat energy that can be dissipated through hydraulic fluid.#### What is a damped oscillation?

While simple harmonic motion**oscillates**with only the restoring force acting on the system,**damped**harmonic motion experiences friction. In many vibrating systems the frictional force F_{f}can be modeled as being proportional to the velocity v of the object: F_{f}= −cv, where c is called the viscous**damping**coefficient.#### Do electromagnetic waves transfer matter?

**Waves**can**transfer**energy over distance without moving**matter**the entire distance. For example, an ocean wave can travel many kilometers without the water itself moving many kilometers. The water moves up and down—a motion known as a disturbance. It is the disturbance that travels in a wave,**transferring**energy.

Updated: 4th December 2019