Torsional Flutter of Rectangular Prisms
Prismatic bar models tested are of rectangular cross section and are provided with different side ratios (depth/height) of 1, 2, 4, and 5. The position of axis of rotation of the model,...
Indicial Aerodynamic Functions for Bridge Decks
With certain classical results for airfoils as a guide, lift and moment functions of the indicial type are derived for suspension bridge deck sections of either the open truss or streamlined...
Aerodynamic Forces on a Triangular Cylinder
Wind tunnel studies have been conducted on flow around an equilateral triangular cylinder mounted with the point upstream. Instantaneous pressure measurements taken around the cross section...
Procedure for Automating Aircraft Wing Structural Design
A computer program entitled Design of Aircraft Wing Structures (DAWNS) is described. Particular methods used to incorporate the analytical procedures required from the aerodynamic and...
Column Instability under Weight and Follower Loads
In this article, the interaction between two types of forces, causing instability of a vertically cantilevered column, is studied. These forces are the conservative force of the column's...
Airfoil and Bridge Deck Flutter Derivatives
The writers compare the flutter phenomena of the suspension bridge and the airfoil and employ a free-oscillation experimental method to measure model bridge flutter coefficients analogous...
Nonconservative Stability by Finite Element
Nonconservative stability of continuous systems has received considerable theoretical attention in recent years. This class of stability problems is examined herein by application of the...
Newport Bridge Superstructure
The superstructure of the Newport Bridge embodies advanced features relating principally to aerodynamic stability, cables, cable anchorages, and cable wrapping. Wind tunnel tests were...
Aeroelastic Instability of Prisms in Turbulent Flow
Lateral oscillations of square and rectangular prisms resulting from its aerodynamic instability (often called galloping oscillations) are analyzed theoretically and studied experimentally...
Lift-Oscillator Model of Vortex-Induced Vibration
The main feature is the representation of fluctuating lift behavior in terms of a proposed wake-oscillator. The primary purpose of the paper is to demonstrate the potential of the wake-oscillator...
Discussion of "Aerodynamic Instability of Suspension Bridges" (April 1968)
Aerodynamic Investigations of Box Girder Bridges
Box girder bridge decks have recently come into wider use. This is of particular interest in the case of suspension bridges where deck form strongly affects the possible response to wind...
Aerodynamic Instability of Suspension Bridges
A general linearized analytical theory for the flutter of suspension bridge decks under uniform steady wind is presented. In this theory, the essential aerodynamic forces are presumed...
Discussion of "Similitude Problems in Building Aerodynamics" (May 1967)
Ablative Coatings for Structural Fire Protection
If ablative coatings are used to protect reentry vehicles under severe aerodynamic heating, why can they not be used to protect structural steel in fires? To answer this question, it is...
Stability of a Bar Under Eccentric Follower Force
A uniform cantilevered bar subjected at the free end to an eccentric, compressive follower force is considered. It is shown that, for cross sections having two axes of symmetry and vanishing...
Vibration Frequencies of the Chesapeake Bay Bridge
The aerodynamic causes of suspension bridge oscillations, i.e., vortex theory, flutter theory, and negative slope theory are examined. Thirteen factors to be considered in the design of...
Closure to "Aerodynamic Stability of H Sections" (April 1966)
Similitude Problems in Building Aerodynamics
Use of model techniques for determining pressure distribution and wind loads on buildings is considered. None of existing simplified laws adequately accounts for velocity distribution...
Aerodynamic Stability of H Sections
A theory is developed for an H section under lateral wind loading to explain the dynamic stability of girder-stiffened suspension bridges. The mathematical model presupposes, as the most...
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