Free & Forced Vibration Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-EELE-11359
Quick Answer: The Free & Forced Vibration Apparatus studies a spring-mass system excited either by moving the spring's upper mounting or by a rotating out-of-balance force, with an oil dashpot for variable damping and two pen recorders.
Last updated: October 2026
Key Features
Two excitation methods: upper spring mounting oscillated with SHM, or a rotating out-of-balance force, both at variable frequency.
Eccentric and connecting rod drive, or an exciter with contra-rotating discs driven from a gearbox through a flexible coupling.
Mass carriage on rollers in vertical guideways to keep uncontrolled damping low.
Variable viscous damping from an oil dashpot.
Continuous paper recorder for amplitude and frequency; rotating drum recorder for amplitude and phase.
Open mechanism with no 'black boxes'; experiment manual included.
Technical Specifications
| Specification | Value |
|---|---|
| Excitation | Support displacement (SHM) or rotating out-of-balance force, variable frequency |
| Damping | Oil dashpot, variable viscous |
| Recorders | Continuous paper recorder and rotating drum recorder |
| Dimensions | 880 x 580 x 1240 mm |
| Net weight | 75 kg |
About This Product
Each drive is geared so that one turn of the eccentric or of the contra-rotating discs matches one turn of the phase recorder, so the drum trace shows the phase of the mass relative to the excitation. Students can plot amplitude and phase against frequency and then add damping at the dashpot to see how the response changes. The Free & Forced Vibration Apparatus can be dispatched from India to Mauritius, Kyrgyzstan, Portugal, Tunisia and Philippines.
Frequently Asked Questions
How is forced vibration produced?
Either by oscillating the upper spring mounting with SHM at variable frequency, through a connecting rod and eccentric, or by applying a rotating out-of-balance force at variable frequency to the vibrating mass.
How are results recorded?
Two pen recorders are provided: a continuous paper recorder for amplitude and frequency, and a rotating drum recorder for amplitude and phase.
Related: Electronics Engineering Lab Equipments, Static & Dynamic Balancing Apparatus, Whirling Of Shaft Apparatus, Universal Governor Apparatus.
For a quotation on the Free & Forced Vibration Apparatus, contact Educational Lab Equipments.
