Havard Engineering Inc.

Dr. Havard participates in meetings and committees of several technical societies, and makes frequent formal and informal contributions on current projects. The following list of papers, presentations ands tutorials illustrates the range of topics of interest. Electronic copies of these papers may be obtained by sending an e-mail request including your mailing address. Up to two papers are free of charge, but we will have to charge for larger quantities.

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Technical Papers and Presentations

• Effect of ice and snow on the dynamics of transmission line cables Part I: Aeolian vibration, wake-induced oscillation and galloping motions", by Pierre Van Dyke and David G. Havard, IWAIS05, Montreal, June 2005.

• "Effects of Ice on the Dynamics of Overhead Lines Part II: Field Data on Conductor Galloping, Ice Shedding, and Bundle Rolling", by David G. Havard and Pierre Van Dyke, IWAIS05, Montreal, June 2005.

• "Dynamic Loads On Transmission Line Structures During Galloping" by D. G. Havard, IWAIS 2002, Brno, Czech Replublic, 17-20 June 2002.

• "Novel Vibration Control For Steel Wire Ropes Supporting Two 287 kV Transmission Circuits", by Nedim Alca, Buckland & Taylor Ltd. and David Havard, Fourth International Symposium on Cable Dynamics, Montreal, May 2001.

• "Lattice Tower Member Fatigue and its Control Using a Novel Damping Scheme", by D.G. Havard and O.C. Perry, IEEE Summer Meeting, Seattle, July 2000.

• "Vibration Dampers", by David G. Havard, CEA Workshop on Transmission Line Asset Maintenance, Session on: Assessment Inspection Methods, Diagnostic Tools, Testing, Condition Monitoring, Life Cycle and Aging, Remedial Measures, Montréal, Oct 18-19 1999.

• "Remote Galloping Studies on a 420 kV Transmission Line in Norway", by S.M. Fikke, K.A. Halsan, D.G. Havard, R. Stenseth, and A. Gerezgiher, Third International Symposium on Cable Dynamics, Trondheim, Norway, 17-19, August 1999.

• "Simulation of Aeolian Vibration of a Conductor Span with a Stockbridge Damper", J. Vecchiarelli, I.G. Currie, and D.G. Havard, Third International Symposium on Cable Dynamics, Trondheim, Norway, 17-19, August 1999.

• "Galloping Data Base on Single and Bundle Conductors Prediction of Maximum Amplitudes", by J.L. Lilien and D.G. Havard, IEEE Summer Meeting, Edmonton, 1999.

• "Analysis of galloping conductor field data", by D.G. Havard, IWAIS '98, 8th International Workshop on Atmospheric Icing of Structures, Reykjavik, Iceland, June 8-11 1998.

• "Installation of Galloping Controls on 400 kV Bundle Lines in Slovakia", by D.G. Havard and D. Hearnshaw, presentation to IEEE, Towers, Poles and Conductors Committee, New York, February 1996.

• "State of the Art on Spacer-Dampers, Part I - Survey Results", by A.P. Goel, J.W. Perlock, C.J. Pon, and D.G. Havard, Presentation to the Session on Conductors and Hardware, Canadian Electricity Association Meeting, Montreal, April 1996.

• "Use of Available Technologies for Assessing the Present Condition of Conductors", by D.G. Havard, Presentation to the Session on Life Extension of Transmission Lines, Canadian Electricity Association Meeting, Montreal, April 1996.

• "Fifteen Years Field Trials of Galloping Controls for Overhead Power Lines", by D.G. Havard, IWAIS '95, 7th International Workshop on Atmospheric Icing of Structures, Chicoutimi, Canada, June 3-6, 1996.

• "Modelling of Single Conductor and Damper Vibration", by J. Vecchiarelli, I.G. Currie, and D.G. Havard, Paper to Canadian Electrical Association, Electricity '95 Conference, Vancouver, March 28, 1995.

• "Spacer-Damper Spacings to Reduce Damage due to Aeolian and Wake Induced Vibration", by D.G. Havard, Y. Motlis, J.R. Meale and S.B. Woodward, Canadian Electrical Association, "Electricity 94" Technology Conference, Toronto, March 1994..

• "Influence of Vibration Recorders on Conductor Vibration", by R.C. Heics and D.G. Havard, IEEE Trans Power Delivery, Vol. 9, No. 2, April 1994 (Paper 93 SM 424-4 PWRD, Vancouver, July 1993).

• "Transmission Line Compaction in Ontario Hydro", by D.G. Havard, M.S. Nashid, J.R. Meale and S.M. Foty, CIGRE Symposium on Compacting Overhead Lines, Paris, Sept 1992.

• "Dynamics of Transmission Line Conductors", by D.G. Havard, IASS-CSCE International Congress on Innovative Large Span Structures, Toronto, 13-17 July 1992.

• "Field Testing of Transmission Towers", by D.G. Havard, S.G. Krishnasamy and G.A. Senkiw, Transmission & Distribution International, Vol. 2 No. 3, pp. 22-26, Sept 1991.

Tutorials (in PowerPoint Format)

• "Conductor Galloping" - A tutorial presented at the IEEE ESMOL & TPC Meeting, Las Vegas, January 2008 by D.G. Havard

• "Conductor Safe Design Tension with respect to Aeolian Vibrations", Tutorial Presented at the IEEE/TPC Meeting, Atlanta, January 2009 by D.G. Havard

• "Fatigue of Conductors - a Summary of Present Knowledge", Tutorial Presented at the IEEE/TPC Meeting, Orlando, January 2010 by D.G. Havard

• "Spacer-Damper Review - Based on CIGRE Brochure 277 and other sources", Tutorial Presented in Winnipeg, June 2011 by D.G. Havard

To contact us please send an E-mail to: dhavard@rogers.com