Análise de sensibilidade de um sistema massa-mola-amortecedor de dois graus de liberdade

Abstract

This work proposes to introduce the system sensitivity analysis one and two degrees of freedom with uncertainties in the parameters. The parametric uncertainties are usually modeled using a probabilistic approach. Under this approach, the concentrated parameters are modeled by random variables that follow a probability density function. To simulate the dynamic response, the applied method is the Monte Carlo simulation, which involves generating a large number of random samples of each uncertain parameter modeled by a random variable. The sensitivity analysis will determine the individual influence of each uncertain parameter in the uncertain response of the system using a statistical approach based on global analysis of variance. The results show the presence of uncertainty can influence deterministically in the variability of the dynamic response of the systems studied. the sensitivity analysis demonstrated that for them the most influential parameter in said variability of response is indeed rigidity, proven in the discussions of the results.