Code approaches to vortex shedding and own model

Application of Simulation Methods of Stochastic Processes to Vortex Excitation

“…The program allows for a simulation of crosswind loads caused by vortex excitation and the lateral response of the structure in real-time. A detailed description of the model can be found in [31][32][33][34]. This paper contains a short explanation of the mathematical model basis and its numerical implementation, which is described in the following 8-step procedure.…”

“…Results concerning maximum lateral top displacement are in agreement with the full-scale data at hand. A detailed comparison of the computation resultsobtained according to the model and the full-scale results collected from the literature was presented in[32,35].…”

Across-wind response of tall circular chimneys to vortex shedding

“…Vortex induced oscillations significantly influence the across-wind load and response of a chimney. Several researchers have significantly contributed to this important problem and these include studies by Wootton (1969), Vickery and Basu (1983), Ruscheweyh (1989), ESDU (1996), and Flaga, Lipecki (2010). In a recent paper, Niemann et al (2014) have observed that available design models for vortex resonance, especially at relatively low Scruton numbers often provide considerable scatter in their results.…”

A Method for Evaluation of Across-Wind Response of a Circular Chimney Including Lock-in Effects and Comparison with ACI Code of Practice

“…Research efforts are still continuing to better explain the influence of Reynolds number and turbulence intensity on various aerodynamic parameters such as rms lift coefficient, spectral bandwidth, correlation length, and Strouhal number. Some of the methods proposed in the literature include those by Ruscheweyh (1989), ESDU(1996) , Arunachalam et al, (2011), and Flaga (2010). Based on research at CSIR-Structural Engineering Research Centre(CSIR-SERC), Chennai, the authors (2010,2011) have earlier proposed that the increased response can still be predicted with the use of structural damping only, with the condition that the suggested method for the nonlock-in region requires suitable modification of the force spectrum in the lock-in region.…”