UPDATING STRUCTURAL DYNAMIC-MODELS WITH EMPHASIS ON THE DAMPING PROPERTIES

The control of complex structural models is a field of growing interes t. The problem studied herein concerns damping updating using experime ntal frequency response functions. Although there are several methods improving structural dynamic models, only a few of them deal specifica lly with damping improvements. The method introduced is built on mecha nical bases, using an error measure on the constitutive relations. The tuning strategy uses an iterative process, each iteration consisting of two steps. The first one is the localization of the erroneous regio ns. The second step is the correction of the parameters belonging to t hese regions. Examples illustrate the sensitivity of the error to the damping defects and its effectiveness for updating damped structures.