Damage detection in an offshore structure

摘要

The structural integrity of a multi-pile offshore platform is investigated by using a vibration based damage detection scheme. Changes in structural integrity are assumed to be reflected in the modal parameters estimated form only output data using an Auto-Regressive Moving Average (ARMA) model. By use of the estimates of the model parameters and their corresponding variances, a probability based damage indicator is formulated. This approach indicates that since the construction of the platform, minor structural changes have taken place. (au) 24 refs.