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- Modal identification methods in time domain numerical tests and applications in civil engineeringPublication . Prior, Ana; Oliveira, Sérgio; Freitas, MatildeThis work intends to contribute to the development and use of time domain modal identification methods, namely the Maximum Likelihood Method (MLM) and the Covariance-Driven Stochastic Subspace Identification Method (SSI-Cov). Both methods are studied using numerically generated data and the SSI-Cov method is applied to the analysis of dam vibration records, due to environmental excitation.