quick overview :

Free and Forced Vibration Apparatus

Technical Description:

All set-ups of this experimental unit on the theory of vibrations are rapidly and securely assembled on a double profile frame made of aluminium using slot nuts and clamping levers. The oscillator consists of a beam mounted in ball bearings at one end; a helical spring is hung on the other end of the beam. The attachment of springs, the exciter and a damper to a perforated panel permits a wide range of different set-ups to be reproduced. Either an unbalance exciter or a displacement exciter generate vibrations; the frequency of the vibrations can be adjusted using the electronic control unit. The displacement exciter can be fitted directly to the base of the spring. The vibrations can be damped using the adjustable viscosity damper. To record vibration processes over time, a mechanical drum plotter is included. The experiment also includes an amplitude contact with a TTL output, e.g. for triggering stroboscopes.

Specification:

Technical Data:

-Bar-type oscillator: LxWxH: 700x25x12mm, 1,6kg

Helical springs

- 0,75N/mm

- 1,5N/mm

- 3,0N/mm Exciter frequency: 0...50Hz, electronically controlled Unbalance of the unbalance exciter: 0...1000mmg Stroke of the displacement exciter: 20mm Damper constant: 5...15Ns/m, oil-filled

Mechanical chart recorder

- feed: 20mm/s - paper width: 100mm