COMMENTS

COMMENTS Th e laws of physics dictate that the wind damage for Tropical Cyclone a given structure must be proportional to the rate of work done by th e win d (and not the force exerted Destructive Potential by by the wind) on the structure. This depends on the deflectio n of the structure under wind loading, Integrated Kinetic Energy but it is certainly not proportional to just the force. Because the deflection itself is proportional to the —LAKSHMI KANTHA force exerted, its dependence on wind velocity must University of Colorado be higher than just its square. It could be equated to Department of Aerospace Engineering Sciences, Boulder, Colorado the dissipation rate of the wind kinetic energy, and hence taken as being proportional to the cube of the win d velocity, as suggested by Emanuel (2005). The win d damage for a given structure, no matter what its characteristics, cannot be proportiona l to just the kinetic energy of th e wind. Therefore, neither SSHS h e recent article on hurrican e destruction potential by Powell and Reinhold (2007) in this (or HII) nor Powell and Reinhold's IKE (and hence W ) can be indicative of th e win d http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
D.O.I.
10.1175/BAMS-89-2-219
Publisher site
See Article on Publisher Site

Abstract

Th e laws of physics dictate that the wind damage for Tropical Cyclone a given structure must be proportional to the rate of work done by th e win d (and not the force exerted Destructive Potential by by the wind) on the structure. This depends on the deflectio n of the structure under wind loading, Integrated Kinetic Energy but it is certainly not proportional to just the force. Because the deflection itself is proportional to the —LAKSHMI KANTHA force exerted, its dependence on wind velocity must University of Colorado be higher than just its square. It could be equated to Department of Aerospace Engineering Sciences, Boulder, Colorado the dissipation rate of the wind kinetic energy, and hence taken as being proportional to the cube of the win d velocity, as suggested by Emanuel (2005). The win d damage for a given structure, no matter what its characteristics, cannot be proportiona l to just the kinetic energy of th e wind. Therefore, neither SSHS h e recent article on hurrican e destruction potential by Powell and Reinhold (2007) in this (or HII) nor Powell and Reinhold's IKE (and hence W ) can be indicative of th e win d

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Feb 1, 2008

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