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    Evolutionary Spectra Estimation Using Wavelets 

    Source: Journal of Engineering Mechanics:;2004:;Volume ( 130 ):;issue: 008
    Author(s): Pol D. Spanos; Giuseppe Failla
    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 ...
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    Advantages of Filter Approaches for the Determination of Wind-Induced Response of Large-Span Roof Structures 

    Source: Journal of Engineering Mechanics:;2017:;Volume ( 143 ):;issue: 009
    Author(s): Pol D. Spanos; Ying Sun; Ning Su
    Publisher: American Society of Civil Engineers
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    Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction 

    Source: Journal of Offshore Mechanics and Arctic Engineering:;2011:;volume( 133 ):;issue: 002:;page 21301
    Author(s): Pol D. Spanos; Vincenzo Nava; Felice Arena
    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 ...
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    Z‐Transform Modeling of P‐M Wave Spectrum 

    Source: Journal of Engineering Mechanics:;1986:;Volume ( 112 ):;issue: 008
    Author(s): Pol D. Spanos; Marc P. Mignolet
    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 ...
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    Simulation of Stationary Random Processes: Two‐Stage MA to ARMA Approach 

    Source: Journal of Engineering Mechanics:;1990:;Volume ( 116 ):;issue: 003
    Author(s): Pol D. Spanos; Marc P. Mignolet
    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 ...
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    Spectral Stochastic Finite‐Element Formulation for Reliability Analysis 

    Source: Journal of Engineering Mechanics:;1991:;Volume ( 117 ):;issue: 010
    Author(s): Roger G. Ghanem; Pol D. Spanos
    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 ...
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    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) 

    Source: Journal of Engineering Mechanics:;1987:;Volume ( 113 ):;issue: 002
    Author(s): Pol D. Spanos; Aik‐Siong Koh
    Publisher: American Society of Civil Engineers
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    Rocking of Rigid Blocks Due to Harmonic Shaking 

    Source: Journal of Engineering Mechanics:;1984:;Volume ( 110 ):;issue: 011
    Author(s): Pol D. Spanos; Aik‐Siong Koh
    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 ...
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    Spectral Approach to Equivalent Statistical Quadratization and Cubicization Methods for Nonlinear Oscillators 

    Source: Journal of Engineering Mechanics:;2003:;Volume ( 129 ):;issue: 001
    Author(s): Pol D. Spanos; Giuseppe Failla; Mario Di Paola
    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, ...
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    Karhunen–Loéve Expansion of Stochastic Processes with a Modified Exponential Covariance Kernel 

    Source: Journal of Engineering Mechanics:;2007:;Volume ( 133 ):;issue: 007
    Author(s): Pol D. Spanos; Michael Beer; John Red-Horse
    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 ...
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