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SE 110.58 Free vibrations in a bending beam



  • Natural frequencies of a free vibrating bending bar1
  • Rayleigh's method to evaluate the natural frequency of a bar


Technical Description

The bending bar in SE 110.58 can be mounted vertically (standing or hanging) or horizontally into the frame SE 112. By varying the free clamping length or moving additional weights, the natural frequency of the bar is changed. The bar is deflected manually to start damped vibrations. The corresponding amplitudes are measured using strain gauges and a measuring amplifier. The signal can be displayed on an interlaboratory oscilloscope.

Learning Objectives / Experiments

- free vibration of a vertical bending bar
- free vibration of a horizontal bending bar 
- determination of natural frequencies according to Rayleigh
- influence of free clamping length and weight on natural frequency


[1] investigation of the free vibration of a bar
[2] elastic bending bar with movable weight 
[3] bar can be mounted to all 4 sides of the frame
[4] amplitude measurement using via strain gauges and measuring amplifier 
[5] fixable meter rule
[6] storage system to house the components

Technical Data

Bending bar
- LxWxH: 635x20x3mm
- material: AlMgSi0.5F22
Set of weights: 10x100g  

Dimensions and Weight
LxWxH: 720x480x180mm (storage system)
Weight: approx. 18kg (total)
Required for Operation 230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase

Scope of Delivery
1 beam
1 measuring amplifier
1 set of weights
1 clamp fixing
1 ruler
1 storage system with foam inlay 
1 instruction manual

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