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Seismic analysis of a class of secondary systems by generalized modes
A parametric study of the response of a class of linear secondary systems to earthquake excitations is made. The combined dynamical system studied consists of a single-degree-of-freedom oscillator attached to a continuous ...
Stochastic fatigue of structural steel at a hole
Nine steel specimens, each containing a small hole have been tested under three sets of variable amplitude loadings to determine the effect of amplitude variability on fatigue life. Twenty-three constant amplitude tests ...
Enzymatic digestion of the lens as an alternative to cataract surgery
The purpose of this research was to determine the effects of enzymatic digestion on the human lens, with the ultimate goal of rendering cataract surgery obsolete. A system for measuring the consistency of a lens, using an ...
Equivalent linearization for random vibrations of a building with yielding girders
The stochastic response of a yielding 2DF system subjected to a stationary Gaussian white noise excitation is investigated. The particular model considered represents a structure with yielding girders, so is more realistic ...
Techniques to obtain seismic time histories of coupled systems
Accuracy and efficiency are investigated for several different methods to obtain time histories of response of coupled linear or nonlinear systems subjected to seismic excitations. Solutions for the composite system of ...