The high risk of construction-assembly activities, the high costs of leased equipment, the pressure to finish installing/uninstalling as quickly as possible, create an environment conducive to ignoring safety practices, especially if the rules do not become mandatory, even if they are known. The purpose of this article is to analyze the response of a wind turbine metallic tubular tower to wind action when, for various reasons, during operation, dismantling or installation, circumstances can arise that leave the structure to remain in a preserved state in different stages. The dynamic response factor of the structure was evaluated using the Romanian National Design Code and Eurocode 1. The relationships are based on the hypothesis that only the vibrations of the structure in the direction of the wind, corresponding to the fundamental mode of vibration, are significant. Because the structure presented is isolated, high and slender, the article also examines the probability of occurrence of interaction effects between vortex shedding and galloping.

The paper aims to investigate the wind conditions at 150 m above the surface, using the extreme value theory, a branch of statistics dealing with the extreme deviations from the median of probability distributions, and the physical model of the MERRA 2 global reanalysis data set in the nearby area of Cobadin Commune, Constanta County, Romania. The insights of the wind characteristics and the knowledge of the extreme values of the wind speed can be useful, not just for the designers, in the rational assessment of the structural safety of wind turbines, but also those evaluating the insured losses.

Usually, wind turbine generator’s structures or radio masts are located in wind exposed sites. The paper aims to investigate the wind conditions in the nearby area of Cobadin Commune, Constanta County, Romania at heights of 150-200m above the surface using global reanalysis data sets CFSR, ERA 5, ERA I and MERRA 2. Using the extreme value theory and the physical models of the datasets, the research focuses on the assessment of the maximum values that are expected for the wind speeds, but the wind statistics created can be used for a further wind or energy yield calculation. Without reaching the survival wind speed for wind turbine generators, with mean wind speed values higher than 7 m/s and considering the cut-in and cut-out wind speeds of 3 m/s, respectively 25 m/s, the site can be exploited in more than 90% of the time to generate electricity, thus, the paper is addressed to the investors in the energy of renewable sources. At the same time, the insights of the wind characteristics and the knowledge of the extreme values of the wind speed can be useful, not just for the designers, in the rational assessment of the structural safety of wind turbines, but also those evaluating the insured losses.