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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Comparison of flutter derivatives for Kao Pin Hsi Bridge and flat plate
 Buljac, A. ; Pospíšil, Stanislav ; Kozmar, H. ; Kuznetsov, Sergeii ; Král, Radomil
Focus of this work is put on evaluation of dimensionless aeroelastic coefficients, i.e. flutter derivatives, which are considered to be indicators of the aeroelastic stability of bridges. A comprehensive experimental study on dynamic wind-induced behavior of the Kao-Pin-Hsi bridge in Taiwan is described. The results are compared to those of the thin flat plate with high width to height ratio, which previously proved to be aeroelastically stable.
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Relation of flutter derivatives and indicial functions in linear aero-elastic models
 Náprstek, Jiří ; Pospíšil, Stanislav
Double degree of freedom (DDOF) linear systems are frequently used to model the aero-elastic response of slender prismatic systems until the first critical state is reached. Relevant mathematical models appearing in literature differ in principle by way of composition of aero-elastic forces. This criterion enables to sort them roughly in three groups: (i) neutral models - aero-elastic forces are introduced as suitable constants independent from excitation frequency and time; (ii) flutter derivatives - they respect the frequency dependence of aero-elastic forces; (iii) indicial functions - they are defined as kernels of convolution integrals formulating aero-elastic forces as functions of time. The paper tries to put all three groups together on one common basis to demonstrate their linkage and to eliminate gaps in mathematical formulations between them.
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