AEROELASTIC AND NONLINEAR STRUCTURAL DYNAMIC INTERACTIONS OF SLENDER STRUCTURES

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AEROELASTIC AND NON-LINEAR STRUCTURAL DYNAMIC
INTERACTIONS OFSLENDER STRUCTURES John H.G.
Macdonald
EPSRC Advanced Research Fellowship 2006-2011

• APPLICATIONS
• Cable bridges structures
• Communication masts
• Electricity transmission lines
• Lighting columns
• Marine structures?, etc.

• ISSUES
• Trend for more slender structures
• Wind-induced vibrations very common
• Large amplitude / fatigue damage
• Aeroelasticity
• Structural motion affects wind loads
• Structural non-linearity and interactions

• 3D effects
• Reynolds number effects
• Multiple degrees of freedom
• Effects of wind turbulence
• Unsteady aerodynamic loading
• Hysteresis of flow transitions
• Effect of surface finish

• AIMS
• Generalised formulation for galloping analysis
• Non-linear structural dynamic analysis of
  cable structures
• Holistic approach to aerodynamics and
  structural dynamics of wind-induced vibrations

• Dynamic interaction of components
• Parametric excitation of cables
• Behaviour of cable networks

• Compatible methods of analysis
• Combinations of aeroelastic and structural
  dynamic effects
• Unified framework for galloping, wind
  turbulence and non-linear dynamic effects

• METHODS
• Mathematical modelling
• Numerical simulation
• Wind tunnel testing
• Hybrid experimental-numerical dynamic
  testing
• Validation against large scale tests and
  full scale measurements

• OTHER INTERESTS
• Other flow-induced vibrations
• Structural health monitoring
• Vibration damping systems
• Hybrid testing
• Pedestrian structure interaction

Contact Dr John Macdonald, Department of Civil
Engineering, University of Bristol
Queens Building, University Walk, Bristol BS8
1TR, UK Email John.Macdonald_at_bristol.ac.uk S
upported by Aerodynamics Laboratory, National
Research Council of Canada RWDI Inc. (Wind
Engineering Consultants)