Abstract
In order to investigate the ability of different objective functions based on modal data for SDD problems, six objective functions are defined and a comparison study is presented in this paper. To make a fair comparison, a quantified index name damage vector consistency is defined to describe the consistency between the identified damage vector factor and the assume one. Simply-supported beam with 10 finite elements is simulated which provides modal data generation and damage cases simulation. The percentage of DVC equaling to 100% in the all 100 times is also calculated which shows the objective function based on MTMAC is the best one for SDD.