Estimation the structure on galloping fluctuation possibility

Monitoring and testing of buildings and structures
Authors:
Yuriy Rutman Vladimir Meleshko
Abstract:

Galloping is self-oscillations of elastic system in wind flow (aeroelastic vibrations). The galloping should be taken into account when designing different structures (pipes, masts, power lines, high-rise buildings, bridges). Existing calculation methods are difficult to realize.

Generalized Glowrt-Den-Gartog criterion taking into account mode shape and wind speed instability all along height is offered. ANSYS CFX program for determination the aero dynamical coefficients is used. Functions for approximation and interpolation of aero dynamical coefficients as functions of wind angle of attack are offered.

The use of obtained results for calculation of Glowrt-Den-Gartog criterion and determination of galloping fluctuation possibility are shown.