Numerical analysis of devices for de-icing lines and ground cables

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Authors
  1. Nandlall, D.
  2. Sidhu, R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
This report summarises numerical analyses performed to predict the responses of Hydro Québec's piston/cylinder prototype and an explosive flyer plate concept that were both investigated for the de-icing ground cables and electrical lines. In the piston/cylinder prototype case, the numerical results obtained compared very well with the experimental results obtained from Hydro Quebec. It was shown that the maximum cable displacement decreases as the static-pretension value is increased. In all cases it was shown that the maximum cylinder displacement remained independent of the cable tension. The negative slope observed in the experimental velocity/time results after the cable has reached its maximum velocity was also captured quite well in the simulations. It was shown that this negative slope was caused by the increase in the mechanical impedance, which was due to the dynamic effect on the static tension. In the case of the explosive concept, the numerical results showed that it is feasible to use such a system to de-ice cables. Comparisons of the results with those of the piston/cylinder prototype show that the cable responds more rapidly using the explosive concept. For the explosive concept it was found that the maximum displacement of the cable varies linearly with the mass of explosive.

Il y a un résumé en français ici.

Keywords
Hydrocode simlation;Icing of Structures;Ice mechanics
Report Number
DREV-ECR-2001-198 — External Client Report
Date of publication
15 Nov 2001
Number of Pages
38
DSTKIM No
CA012039
CANDIS No
516635
Format(s):
Hardcopy;Document Image stored on Optical Disk

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