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Products  |  Engineering Mechanics and Machine Elements  |  Statics  |  SE 110.50
SE 110.50 Cable under Dead-Weight Show data sheet (pdf file) Print page
Technical Description

Free-hanging cables and ropes are often used to support a structure, such as stay cables. On suspension bridges they are the load-bearing element of the structure. In many calculations the influence of the dead-weight of the cable can be ignored, because it is low compared to the other loads. In the case of overhead power lines, however, the dead-weight of the cable is relevant to the design of the pylons.
  In SE 110.50 a free-hanging cable under the influence of its own dead-weight is investigated. A roller chain serves as the cable, and is mounted on two ball bearing-supported chain wheels. The chain wheel units are fixed to a cross-arm. The spacing between the chain wheel axles can be adjusted horizontally and vertically. Weights can be attached to both ends of the chain. The maximum sag is measured using scaled rules, and can be compared with calculated values. The sag is the distance between the connecting line of the bearings and the catenary (see also illustration: "Actual applied cable forces" on the next page).
  The various elements of the experiment are clearly laid-out and housed securely in a storage system. The complete experimental set-up is arranged in the frame SE 112.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments
- Determination of the catenary of a free-hanging
  cable
  * under dead-weight only
  * with additional weights
  * with a symmetrical set-up (chain wheels at same
     height)
  * with an unsymmetrical set-up
- Measurement of the sag
- Comparison of calculated and measured values
Features
* Catenary of a free-hanging cable under dead-weight
Specification
[1] Determination of the catenary of a free-hanging cable
[2] Symmetrical and unsymmetrical experimental set-up possible
[3] Roller chain as cable with 2 ball bearing-mounted chain wheels
[4] Adjustable chain wheel axle spacing
[5] Height of a chain wheel adjustable for unsymmetrical experimental set-up
[6] Cross-arm with scale to hold chain wheels and rule to measure vertical sag of chain
[7] 2 graduated weight sets
[8] Storage system to house the components
[9] Experimental set-up in frame SE 112
 
Technical Data
Roller chain
- DIN 8187
- length: 2400mm
- weight: 0.95kg/m
Chain wheel, number of teeth: 17
Cross-arm
- axle base: 600...1000mm
- groove spacing: 50mm
Holder
- adjustable height of chain wheel: 0...300mm
- hole spacing: 50mm
Measuring ranges
- horizontal: 0...1000mm
- vertical: 0...850mm
- graduations: 1mm
Set of weights
- 2x 1N (hangers)
- 8x 1N
- 6x 5N
 
Dimensions and Weight
Weight: approx. 17 kg
Scope of Delivery
1 roller chain
1 cross-arm with clamp
2 chain wheels with holders
1 rule
2 sets of weights
1 storage system
1 set of instructional material
Order Details

022.11050  SE 110.50  Cable under Dead-Weight


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© 2005 G.U.N.T. Gerätebau GmbH