### VIB – LAB

This set up has been designed to perform and verify the principles involved in study of vibrations. It consists of a basic frame and various components and sub assemblies designed for quick changeover and easy assembly of number of experiments in vibrations. A speed controller unit is provided for forced vibration experiments.

With this unit following experiments can be conducted –

Pendulum Experiments

For Pendulum a sub frame is attached to upper beam. Two Chucks and Hardened V guide is provided for carrying experiments.

Experiment - 1 - Simple Pendulum

To verify the relation

```			   L
T  =  2 p
g
```

and plot graph T˛ Vs. L

Experiment - 2 - Compound Pendulum

1. To verify the relation
```                            K˛ + (OG)˛
T = 2 p
g (OG)

```
2. To determine the radius of gyration and equivalent length of compound pendulum.

Experiment - 3 - Bi-filler Suspension

( Tortional Oscillations) To determine the radius of gyration of body about the center of gravity by using relation

```
K           L
T = 2 p
a	  g

```

Experiment - 4 - Longitudanal Vibration

To verify the relation -

```               			     W
T = 2 p
Km x g

```

and plot graph T˛ Vs. W

Experiment - 5 - Equivalent spring mass system

Study of un damped natural vibrations of beam pivoted at one end supported by tension spring at the other end.

Experiment - 6 - Equivalent spring mass system

Study of undamped natural vibration of beam pivoted at one end supported by tension spring at the other end to plot a graph of amplitude verses frequency.

Experiment - 7 - Single Rotor

To verify the relation -

```               			 I
T  = 2 p
Kt

```

and study the relationship between the periodic time and shaft length.

Experiment - 8 - Two Rotor

To verify the relation -

```               			IA + IB
T = 2
Kt (IA + IB)

```

and plot a graph F Vs. 1/ I1

Experiment - 9 - Single Rotor with viscous damping

To find out the damping coefficient Ct for various depths of damping drum (Immersed in oil) and to plot a graph of damping torque Vs. depth of damping drum.

Experiment - 10 - Dunkerley's Rule

To find out the natural frequency of a beam with and without load and to verify the Dunkerley's Rule.

Experiment - 11 - Forced Vibrations

To study the forced vibrations for various amount of damping and to plot a graph of amplitude verses frequency.
Following accessories will be supplied along with unit. -
Exciter unit with FHP motor and controller.
Ordinary strip chart recorder.
Damper with an arrangement for changing damping.   