Free and Forced Vibration Apparatus
Product Code : EL-DOMLE-10772
Quick Answer:
The Free and Forced Vibration Apparatus is a bench-mounted trainer that demonstrates the fundamentals of free, damped and forced mechanical vibration using a bar-type oscillator mounted on a sturdy aluminium profile frame. Interchangeable coil springs, an oil-hydraulic damper with adjustable damping, and an imbalance or displacement exciter for spring base-point excitation let students study resonance, amplitude response and phase response, while a mechanical drum recorder or an optional PC-based data-acquisition unit captures the resulting vibration traces.
The experimental unit clearly demonstrates the fundamentals needed to deal with free and forced vibrations. Its central element is a sturdy aluminum profile frame to which the different experimental setups are attached, allowing the differences between the two main types of excitation for forced vibrations to be shown on a simple vibration model; a bar-type oscillator is used as the vibration system, offering easy and flexible configuration, with the spring, damper and vibration exciter able to be mounted in any position. An imbalance exciter and a displacement exciter are available for spring base-point excitation, and the excitation frequency is set and displayed on a control unit. An oil hydraulic damper allows damped vibrations with an adjustable damping level, a mechanical drum recorder offers the option of recording the vibrations, and the measured values can also be displayed and analyzed on a PC using the optional unit for data acquisition.
FEATURES:
Demonstration of basic fundamentals of mechanical vibration theory
Free vibrations
Damped vibrations
Inertia force and displacement excitation
Forced vibrations
Resonance
Amplitude response and phase response
SPECIFICATION:
Fundamentals of mechanical vibration theory; free, damped and forced
Bar-type oscillator: LxWxH: 700x25x12mm, 1,6kg
Damper constant: 5…15Ns/m, oil-filled
Coil springs :
0,75N/mm
1,5N/mm
3,0N/mm
Exciter :
Frequency: 0…50Hz, electronically controlled
Imbalance of the imbalance exciter: 0…1000mmg
Stroke of the displacement exciter: 20mm
Mechanical drum recorder :
Feed: 20mm/s
Paper width: 100mm
Required for operation :
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
DIMENSIONS AND WEIGHT:
L x W x H (approx.): 1200 x 600 x 1400 mm
Weight: 125kg
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Last Updated: September 2026
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