000009985 001__ 9985
000009985 005__ 20141205154136.0
000009985 04107 $$aeng
000009985 046__ $$k2008-10-12
000009985 100__ $$aFeng, Xin
000009985 24500 $$aOptimal Sensor Placement for Structural Damage Identificaiton with Modal Measurements

000009985 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009985 260__ $$b
000009985 506__ $$arestricted
000009985 520__ $$2eng$$aA methodology of optimum sensor placement for structural health monitoring, which simultaneously meets the requirements of the damage identifyability and the modal differentiability, is presented in the paper. The modal differentiability and damage identifiability are two crucial issues for structural health monitoring. However, the optimum sensor locations based on the modal differentiability contradicts the results based on the damage identifiability in the previous research. Firstly, the output of the damaged structure is expressed in time domain as a function of mode shapes, eigenvector sensitivity and modal coordinates, which relates the modal differentiability with the damage identifiability. Secondly, the formulation for the FIM is presented, and the optimal criterion is proposed to maximize the 2-norm of the FIM and to minimize the condition number of the output matrix. Thirdly, an iterative algorithm is developed to get the optimal sensor placement for the number of available sensors. Finally, numerical examples are carried out to demonstrate the feasibility and effectiveness of the proposed approach. The results show that the damage can be accurately identified by the information of the sensors placed by the proposed approach. The novel method effectively overcomes the contradiction between the modal differentiability and the damage identifiability.

000009985 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009985 653__ $$aOptimal sensor placement, Structural damage identification, Modal measurement, Modal differentiability, Damage identificability

000009985 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009985 720__ $$aFeng, Xin$$iSun, Xiao-meng$$iZhu, Tong$$iZhou, Jin
000009985 8560_ $$ffischerc@itam.cas.cz
000009985 8564_ $$s173641$$uhttps://invenio.itam.cas.cz/record/9985/files/05-01-0394.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0394.
000009985 962__ $$r9324
000009985 980__ $$aPAPER