Dynamic Response of Block Foundations

Induced Oscillations of Liquid Jet-Gas Cavity System
This investigation studies the basic liquid jet-gas cavity interaction, accounting for compressibility, frequency and amplitude of jet oscillation, and fall characteristics of the undisturbed...

Waves Generated by Horizontal Oscillations in Bays
The waves generated in a coastal basin by the horizontal components of ground motion (e.g., during an earthquake) are studied. Special emphasis is placed on the resonant response of the...

Parametric Resonance of Suspension Roofs in Wind
Since suspension roofs or curved membrane roofs are usually flexible, there are two important problems with regard to dynamic instability in wind-induced vibration of these roofs; one...

Dynamic Behavior of Partially Embedded Pile
Vibrational behavior of a partially embedded pile has been studied theoretically and some of the results compared with available field data. A mathematical model incorporating pile-soil...

Evaluation of Resonant Column Test Devices
Resonant column tests were performed by six participants in a program designed to evaluate results from various devices. The participants were Drnevich, Hardin, Woods, Shannon &...

Effects of Entrance Loss on Harbor Oscillations
By assuming a head loss across the harbor entrance the wave-induced response in a rectangular model harbor is studied theoretically. The loss is assumed to be quadratic in local velocity...

Response of a Column in Random Vibration Tests
Laboratory experiments were conducted to observe and measure the response amplitude and frequency of a simply supported column. The column was excited by axial forces generated from sinusoidal...

Resonances in Harbors with Variable Depths

Channel Friction and Slope Effects on Harbor Resonance
An approximate matching technique uses separate solutions in a semi-infinite ocean bounded by a straight coastline, a harbor basin, and a narrow straight entrance channel which connects...

Response of Hyperbolic Cooling Towers to Turbulent Wind
The paper outlines a general procedure to predict the dynamic response, including resonance of hyperbolic cooling towers to turbulent winds. Pressure spectra on the tower surface were...

Dynamic Wind Stresses in Hyperbolic Cooling Towers
The paper outlines a general procedure to estimate the wind dynamic stresses in hyperbolic cooling towers on the basis of a statistical dynamic approach. Using wind tunnel measurements...

Asymptotic Solutions of Resonances in Harbors with Connected Basins
Asymptotic formulas for the resonant wave numbers are obtained for harbors with connected basins. The number of basins is taken to be two in this paper. However, generalization of the...

Resonance in Pipes having Variable Characteristics
By using the Runge-Kutta Method, the field matrix for a pipeline having variable characteristics along its length is derived. This matrix can be used to determine the resonant frequencies...

Resonant Response of Offshore Structures
A nonlinear deterministic mathematic model is used to investigate the resonant response of a tall offshore structure under the action of periodic deep water waves. The added mass which...

Vertical Vibration of Embedded Footings
The theory makes it possible to consider soil as an elastic half-space or a stratum. In the latter case, embedment becomes particularly important because the omission of embedment leads...

Dynamic Stability of Tube Conveying Fluid
The parametric resonance of a simply supported tube is studied analytically. By employing Galerkin's method, the equation of motion is reduced to a system of coupled Mathieu-Hill-type...

Channel Effects in Harbor Resonance
The effect of an entrance channel on the response of narrow-mouthed harbors to long periodic incident water waves is examined by means of an approximate approach developed previously by...

Fundamental Frequencies of Axially Moving Beams
There are several instances of engineering importance in which axial motion influences the linearized transverse vibration of a beam. Unexpected resonances can occur if the effect the...

Hydroelectric Power Plant Trashrack Design
Trashracks subjected to high velocity flow should be designed to avoid operating under resonant conditions. This requires that design consideration be given to the natural frequency of...

 

 

 

 

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