# Response of Embedded Footings to Vertical Vibrations

*Field vibratory tests have been carried out to study the effect of embedment on the vertical response of footings. Steady-state vibration tests indicate decrease of maximum amplitudes...*

Nonlinear Dynamics of Curved Cable Elements

*A finite element analog to the dynamic response of nonlinear cables has been developed which employs straight cable elements to model the curved geometry of the cable system. Temporal...*

Incremental Response of 3-D Cable Networks

*A finite element analog to the nonlinear response of single cables to dynamic loadings has been introduced previously. The intent of this note is to extend the applicability of the finite...*

Approximate Solution for Unconfined Seepage

*An approximate solution procedure by using the finite element method is developed for one-dimensional unsteady free surface seepage. The numerical results are compared with experiments...*

Random Behavior of Columns

*Using an analog computer for simulations, an empirical relationship is developed for the stability condition of a pin-ended column, which is excited by a physical white noise. The effect...*

Nonlinear Bending of Bars

*The object of the present investigation is to develop a method, using the analog computer, for the analysis of nonlinear bending of bars having any arbitrary shape and subjected to arbitrary...*

Monte Carlo Study of Seismic Structural Safety

*A simulation of the lateral ground motion of strong earthquakes is performed with the use of a random function generator and an analog computer. The statistical properties of the simulated...*

Analog Analysis of Water Distribution Networks

*A technique for solving hydraulic network flow distribution problems using a standard analog computer is presented. This method can be applied to networks which include various hydraulic...*

Distribution of Response to Simulated Earthquakes

*The problem of establishing distribution functions of peak relative responses of linear single degree-of-freedom (SDF) systems to earthquake excitation has received attention from several...*

Seepage Study using Electrical Analog

*A simple and inexpensive electrical analog is considered, which was used to study two-dimensional seepage in heterogeneous media. It consists of multiple layers of conductive paper. Simple...*

Analog of Ground Water in East-Central New Mexico

*A study, utilizing an electric resistor-capacitor analog model, has been made to determine the adequacy of the ground water supply for the approximate 60,000 acres now irrigated in Portales...*

Analog Simulation of Activated Sludge Systems

*Analog computer solutions of activated sludge design equations are presented for constant, shock, and periodic feed input conditions. System responses of the aerated lagoon, extended aeration,...*

Rotary Flow Meter as Turbulence Transducer

*Two factors prevent the direct determination of the point spectrum of axial turbulence from a spectrum of the fluctuations in rpm values of the analog output of a rotary flow meter. The...*

Graphical Statistics and Common-Sense Applications

*Analogs in statistics and mechanics can give the engineer a commonsense meaning of arithmetic means, standard deviations, and lines of mutual regression by least squares. Even so, numbers...*

Drawdowns Due to Pumping from Strip Aquifers

*Drawdown patterns due to pumping from wells in long narrow (strip) aquifers are dependent mainly on the type of side boundary (recharge, impermeable). A theoretical solution is developed...*

Discrete Model Analysis of Elastic-Plastic Plates

*By invoking the usual assumptions of the classical theory of plates and shells, a discrete flexural model of a plate is deduced from a discrete model of three-space solids. All the flexural...*

Waterhammer Analysis by Analog Computers

*The basic partial differential equations for unsteady flow are adapted to a standard analog computer. Two waterhammer examples are computed and compared to both experimental and precise...*

Airplane Take-off and Landing Paths

*The problem of tracking airplanes in the approach zone of a major airport was solved using ordinary cameras, descriptive geometry, and vector computations. Mean errors in elevation were...*

Snake Plain Analog Studies

*Design, construction, and operation of an electric analog to correlate existing geologic and hydrologic data, and to guide future exchange pimping and recharge operations in the Snake...*

Stress-Controlled Apparatus for Triaxial Testing

*A testing machine in which the rate of true stress can be controlled manually or automatically is described. A pneumatic analog computer continuously calculates the cross section of the...*

Return to search