CES5587_Wind_Engineering PPT

0 5 u 2 b kh 1 b u kp5 b u ka b u 1 05

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Unformatted text preview: Formulation: Lae F ae = Dae = M ae 0 .5 ρ U 2 B KH 1* B / U * * KP5 B / U KA * B / U 1 0.5 ρ U 2 B * 0 .5 ρ U 2 B 2 K 2H 4 * K 2 P6 * KH 5 B / U * KP1 B / U * KA 5 B / U K 2 A4 * K 2H 6 * K 2 P4 * KH 2 B / U * KP2 B / U * * K 2 A6 * KA 2 B / U * Non-dimensional aerodynamic coefficients Hi ∗, Pi∗ and Ai∗ are called the flutter derivatives Functions of Reduced Frequency, K=Bω/U & h / B * h / B K 2H 3 & * p / B 2 K P3 * p / B K 2 A3 α & α Flutter Analysis Analytical Analytical Formulation: Aeroelastically Modified Equations of Motion: && + C eff y + K eff y = 0 & y y 0 X = , A = eff & − K y State-Space Format: & X = AX , Flutter Derivative: 2m h eff mech H (K ) = − C 11 − C 11 ρ B 2ω * 1 ( I eff −C ) Wind Wind Tunnel Measurements Filtering Noisy Displacement: Numerical Numerical Methods Velocity & Acceleration by Finite Difference: Experimental Experimental Setup 3-DOF Elastic Suspension System Experimental Experimental Setup Vertical & Horizontal Force Transducers Experimental Experimental Setup Torsional DOF Assembly & Torque Sensor Experimental Experimental Setup Fluctuating Pressure Measurement on Section Model Experimental Experimental Setup Electromagnetic System for Initial Conditions Experimental Experimental Setup Data Acquisition for Wind Tunnel Testing Experimental Experimental Setup 1-DOF LATERAL MOTION Experimental Experimental Setup 1-DOF TORSIONAL MOTION Experimental Experimental Setup 1-DOF VERTICAL MOTION Experimental Experimental Setup 2-DOF LATERAL-TORSIONAL MOTION Experimental Experimental Setup 3-DOF VERTICAL-LATERAL-TORSIONAL MOTION Fluctuating Fluctuating Lift and Moment Experimental Results (Bridge Deck Section): Fluctuating L...
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This note was uploaded on 03/28/2013 for the course CES 5587 taught by Professor Chowdhury during the Spring '13 term at FIU.

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