摘要：Atmospheric wind close to the ground surface may usually be modelled as a Gaussian stationary random process. The expected value and the power spectral density function are used to characterize this process. In previous works, has been developed a scheme of structural analysis that incorporates the wind action for a Monte Carlo simulation procedure of a Gaussian stationary random process, correlated in vertical sense. A numerical integration method is used in the frequency domain. As structure model a general formulation of beams is adopted with constitutive law general linear viscoelastic. Besides, the fast Fourier transform (FFT) algorithm is used to work in the frequency domain. The focus is particularly appropriate for the determination of the dynamic response of towers and chimneys to the longitudinal wind action, having been employed with excellent results to obtain the response of structures excited by the atmospheric turbulence, for which experimental evidence exists in the specialized literature. In this paper the model is extended for the determination of field matrix in the state space formulation, considering the linearized equations of motion for the effect of fluid-structure interaction.
其他摘要：Atmospheric wind close to the ground surface may usually be modelled as a Gaussian stationary random process. The expected value and the power spectral density function are used to characterize this process. In previous works, has been developed a scheme of structural analysis that incorporates the wind action for a Monte Carlo simulation procedure of a Gaussian stationary random process, correlated in vertical sense. A numerical integration method is used in the frequency domain. As structure model a general formulation of beams is adopted with constitutive law general linear viscoelastic. Besides, the fast Fourier transform (FFT) algorithm is used to work in the frequency domain. The focus is particularly appropriate for the determination of the dynamic response of towers and chimneys to the longitudinal wind action, having been employed with excellent results to obtain the response of structures excited by the atmospheric turbulence, for which experimental evidence exists in the specialized literature. In this paper the model is extended for the determination of field matrix in the state space formulation, considering the linearized equations of motion for the effect of fluid-structure interaction.
