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Deterministic and random vibrations of systems with frequency-dependent parameters or fractional derivatives
Frequency and time domain analyses of system models containing frequency dependent parameters or fractional derivatives are considered. Both model types result in integro-differential equations in the time domain, and in ...
A method to model passive oxygen reaeration in naturally attenuating plumes using Fick's Law
To physically represent oxygen reaeration in contaminant fate and transport modeling Fick's Second Law of Diffusion is numerically solved to obtain a mass flux of oxygen entering the groundwater. This mass flux of oxygen ...
Flood estimation in a highly urbanized watershed using advanced radar (NEXRAD)
Advanced radar (NEXRAD) was used for collection of rainfall data over Brays Bayou in Houston, TX for the storms in October 1994 and January 1998. The radar rainfall data was calibrated to the rain gauge system within the ...
Analysis of nonlinear structural systems accounting for both system parameter uncertainty and excitation stochasticity
Limiting ourselves to only loading and system parameter uncertainties, the dynamic loading to a structure can be modeled as a random function while the system or material parameters can be modeled as random fields. Through ...
Stability of elastic/plastic columns and circular rings with random geometric imperfections
The stability of elastic/plastic columns and circular rings with random geometric imperfections is investigated. Columns are analyzed for axial loading and rings for uniform external pressure. A procedure is developed to ...