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Time-domain model for predicting aerodynamic loads on a slender support structure for fatigue design / Chang, Byungik in Journal of engineering mechanics, Vol. 136 N° 6 (Juin 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 6 (Juin 2010) . - pp. 736-746 Titre : Time-domain model for predicting aerodynamic loads on a slender support structure for fatigue design Type de document : texte imprimé Auteurs : Chang, Byungik, Auteur ; Sarkar, Partha, Auteur ; Phares, Brent, Auteur Article en page(s) : pp. 736-746 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Buffeting  Vortices  Aerodynamics  Poles  Fatigue  Cyclic  loads  Models  Time  factors. Résumé : This paper presents the development of a universal model for predicting cyclic aerodynamic loads originating from buffeting, self-excited, and vortex shedding on a slender support structure in the time domain that can be used to predict its fatigue life. To accomplish this development, long-term monitoring was performed on a high mast light pole (HMLP) and the field data were used to validate the developed mathematical model. Wind-tunnel tests were conducted on the dodecagonal (12-sided) cylindrical cross section of the light pole to obtain the necessary aerodynamic parameters such as static force coefficients, Strouhal number, and indicial functions for buffeting that appear in the postulated model. Furthermore, these aerodynamic parameters were cast into a coupled dynamic model for predicting the response of any HMLP in time domain from vortex shedding and buffeting. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] [article] Time-domain model for predicting aerodynamic loads on a slender support structure for fatigue design [texte imprimé] / Chang, Byungik, Auteur ; Sarkar, Partha, Auteur ; Phares, Brent, Auteur . - pp. 736-746. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 6 (Juin 2010) . - pp. 736-746 Mots-clés : Buffeting  Vortices  Aerodynamics  Poles  Fatigue  Cyclic  loads  Models  Time  factors. Résumé : This paper presents the development of a universal model for predicting cyclic aerodynamic loads originating from buffeting, self-excited, and vortex shedding on a slender support structure in the time domain that can be used to predict its fatigue life. To accomplish this development, long-term monitoring was performed on a high mast light pole (HMLP) and the field data were used to validate the developed mathematical model. Wind-tunnel tests were conducted on the dodecagonal (12-sided) cylindrical cross section of the light pole to obtain the necessary aerodynamic parameters such as static force coefficients, Strouhal number, and indicial functions for buffeting that appear in the postulated model. Furthermore, these aerodynamic parameters were cast into a coupled dynamic model for predicting the response of any HMLP in time domain from vortex shedding and buffeting. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...]