Item Description

Vibration is defined as the motion of a particle, body or system of connected bodies displaced from a position of equilibrium. Most vibrations in machines and structures are undesirable because they increase stresses, raise energy losses, create additional noise, etc.

Vibrations can be classified into two categories:  free and forced. Free vibrations of a system are vibrations that are caused by an initial input and then are allowed to vibrate freely without the application of any external forces. In addition, a damper can be used in a free vibration system to dissipate a certain percentage of energy with each cycle of vibration.

Sci-tech Free Vibration Apparatus Model MT 054 has been designed to perform demonstrations and experiments which provide an understanding of the free vvibrations of a simple spring-mass-damper system.

Demonstrations may be carried out to illustrate free and damped vibrations of a simple spring-mass system having one degree of freedom and the response of a second order mechanical system to a step input.

Experiments can be carried out by the students to investigate the relationship between the mass of the body, the stiffness of the spring and the period frequency of oscillation and to observe the effect of viscous damping on the system.

‘he basic components of the unit consist of a rigid frame with vertical mass carriage guides, an upper mounting plate for the spring and a lower mounting plate for the damper. ‘he mass carriage is constrained by rollers which run along the vertical guides to provide a single degree of freedom with minimum uncontrolled damping.

A pen, attached to the vibrating frame, and a paper strip, drawn by a synchronous motor, provide a means of producing amplitude0time recordings.

Springs of various stiffness and suitable masses are supplied. ‘The damper is adjustable to provide a wide range of damping.