Thunderstorm-induced mean wind velocities and accelerations through the continuous wavelet transform

By analysing a set of thunderstorm-induced events acquired on the Italian north-west coast, separation relevant wind velocity signals into time-varying mean and residual fluctuation is considered. It assumed that, within structural design process, former used for quasi-steady evaluation aerodynamic loads latter to estimate dynamic response. A procedure based continuous wavelet transform proposed obtain its outcomes are compared with those different moving average techniques. The filtering appears provide that better describes main time variations original signals; decrease correlation between velocities also found. derivative speed leads acceleration, whose characteristics possible role in process discussed. An acceleration-induced contribution slender body carried out through Morison equation. force term directly related acceleration shown generally have limited influence total loads, except bodies considerably elongated flow direction.