STRUCTURAL HEALTH ASSESSMENT USING A PARTITION MODEL UPDATE TECHNIQUE

摘要

In this work, a previously proposed minimum rank perturbation theory (MRPT) is extended to determine the damage extent of each structural element or portion independently. This improved procedure presents the advantage of needing only a small number of modes to assess the damage extent. Two numerical simulated examples and an experimental problem are presented to illustrate the characteristics and improvements associated with the proposed procedure. It is shown that the present procedure results in a dramatic decrease over the original MRPT in the number of modes needed in assessing the damage.