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Evolutionary Spectra Estimation Using Wavelets
Publisher: American Society of Civil Engineers
Abstract: A wavelets-based method is developed to estimate the evolutionary power spectral density (EPSD) of nonstationary stochastic processes. The method relies on the property that the continuous wavelet transform of a nonstationary ...
Advantages of Filter Approaches for the Determination of Wind-Induced Response of Large-Span Roof Structures
Publisher: American Society of Civil Engineers
Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Due to the rather intense ongoing development of deep water gas and oil fields, the technical community has devoted considerable attention to the dynamic behavior of Spar floating systems. Spar ...
Z‐Transform Modeling of P‐M Wave Spectrum
Publisher: American Society of Civil Engineers
Abstract: The approximation of the Pierson‐Moskowitz (P‐M) wave spectrum as the output of digital filters to white noise excitation is considered. It is shown that the mathematical peculiarity of this spectrum is the source of the ...
Simulation of Stationary Random Processes: Two‐Stage MA to ARMA Approach
Publisher: American Society of Civil Engineers
Abstract: The determination of moving average (MA) and autoregressive moving average (ARMA) algorithms for simulating realizations of multivariate random processes with a specified, or target, spectral matrix is presented. The MA ...
Spectral Stochastic Finite‐Element Formulation for Reliability Analysis
Publisher: American Society of Civil Engineers
Abstract: An approach for the solution of problems of structural mechanics involving material variability is proposed. The material property is modeled as a stochastic process. The Karhunen‐Loeve expansion is used to represent this ...
Closure to “<i>Rocking of Rigid Blocks Due to Harmonic Shaking</i>” by Pol D. Spanos and Aik‐Siong Koh (November, 1984, Vol. 110, No. 11)
Publisher: American Society of Civil Engineers
Rocking of Rigid Blocks Due to Harmonic Shaking
Publisher: American Society of Civil Engineers
Abstract: The dynamic behavior of rigid‐block structures resting on a rigid foundation subjected to horizontal harmonic excitation is examined. For slender structures, the nonlinear equation of motion is approximated by a piecewise ...
Spectral Approach to Equivalent Statistical Quadratization and Cubicization Methods for Nonlinear Oscillators
Publisher: American Society of Civil Engineers
Abstract: Random vibrations of nonlinear systems subjected to Gaussian input are investigated by a technique based on statistical quadratization, and cubicization. In this context, and depending on the nature of the given nonlinearity, ...
Karhunen–Loéve Expansion of Stochastic Processes with a Modified Exponential Covariance Kernel
Publisher: American Society of Civil Engineers
Abstract: The spectral representation of stationary stochastic processes via the Karhunen-Loéve (KL) expansion is examined from a numerical efficiency perspective. Attention is focused on processes which have commonly been characterized ...