Abstract: A methodology for a multi-process and multi-variable assessment of port operability/downtime in harbors, based
on the historical characterization of the wave-induced response of moored ship systems at berths, in relation to
both the historical outer- and in-port spectral wave climate, is presented in this paper. A joint numerical
modeling and statistical approach is adopted with the objectives of exhaustive evaluation of port operability,
uncertainty bounding and computational efficiency. First, the most accurate numerical configuration to predict
the multivariate response of the moored ships is determined from an extensive catalog. This is done through a
prototype-data-based performance assessment, where the complete time and spectral distributions of motion
variables are used, instead of the classical time-averaged or spectrum-aggregated parameterizations. Secondly,
an efficient assessment of port operability/downtime and safety is achieved based on a multivariate system
response pattern-type approach related to representative wave climate conditions. This multi-process characterization
allows to identify specific wave climate and mooring conditions triggering downtime or unsafe situations
at berths. In addition, a tailor-made mooring plan can be suggested for each situation, also visualizing the
operability and safety levels relative to each system response variable. Finally, a further characterization based
on joint probability functions of motion amplitudes and periods over the berthing event?s duration is proposed,
showing the time variability of motion variables, and suggesting advancing beyond the classical monoparametric
definitions.
