Galloping Oscillations of Hysteretic Structures

by Wilfred D. Iwan, Prof.; California Inst. of Tech., Pasadena, CA,

Serial Information: Journal of the Engineering Mechanics Division, 1973, Vol. 99, Issue 6, Pg. 1129-1146

Document Type: Journal Paper


The nature of the aerodynamic galloping oscillation of a hysteretic system is examined using approximate analytic and numerical techniques. It is shown that the hysteretic nonlinearity can have a marked effect on the amplitude and stability of the response. The presence of hysteretic damping of the type considered does not affect the value of the critical flow velocity at which the equilibrium position becomes unstable for certain linear systems. However, the hysteretic damping generally causes the system response to become unbounded above some finite flow velocity.

Subject Headings: Oscillations | Damping | Fluid velocity | Aerodynamics | Numerical analysis | Critical flow | Linear flow | Equilibrium

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