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Minimum foundation mass for vibration control / A. J. Anyaegbunam in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 2 (Fevrier 2011) . - pp. 190-195 Titre : Minimum foundation mass for vibration control Type de document : texte imprimé Auteurs : A. J. Anyaegbunam, Auteur Année de publication : 2011 Article en page(s) : pp. 190-195 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Foundation  vibration  Analog  solution  Damping  ratio  Minimum  mass  Ideal  optimum  solution  Best  nonoptimum  solution Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This note utilizes the analog models of forced vibration to express the mass of foundation block in terms of damping ratio and thereafter obtains the expression for the minimum foundation mass required to limit vertical machine vibration amplitude to a prescribed limit. The resulting formula, which accounts for internal damping, is constrained by the limitations of the original analog solutions. Moreover, formulas are derived for determining the damping ratio for conditions different from optimum that enable the evaluation of the nonoptimum foundation mass required to limit vibration. Since the ideal optimum solution may not be practical, an expression has been derived for the best nonoptimum foundation mass. The method presented in this note is believed to be easier to implement and to yield smaller foundation blocks than the existing traditional method, and thus will enable cheaper machine foundations to be constructed. It is believed that the proposed optimal solution may lead to the near elimination of machine vibration nuisance produced by high-frequency machines during operation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i2/p190_s1?isAuthorized=no [article] Minimum foundation mass for vibration control [texte imprimé] / A. J. Anyaegbunam, Auteur . - 2011 . - pp. 190-195. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 2 (Fevrier 2011) . - pp. 190-195 Mots-clés : Foundation  vibration  Analog  solution  Damping  ratio  Minimum  mass  Ideal  optimum  solution  Best  nonoptimum  solution Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This note utilizes the analog models of forced vibration to express the mass of foundation block in terms of damping ratio and thereafter obtains the expression for the minimum foundation mass required to limit vertical machine vibration amplitude to a prescribed limit. The resulting formula, which accounts for internal damping, is constrained by the limitations of the original analog solutions. Moreover, formulas are derived for determining the damping ratio for conditions different from optimum that enable the evaluation of the nonoptimum foundation mass required to limit vibration. Since the ideal optimum solution may not be practical, an expression has been derived for the best nonoptimum foundation mass. The method presented in this note is believed to be easier to implement and to yield smaller foundation blocks than the existing traditional method, and thus will enable cheaper machine foundations to be constructed. It is believed that the proposed optimal solution may lead to the near elimination of machine vibration nuisance produced by high-frequency machines during operation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i2/p190_s1?isAuthorized=no