|
| Structural damage detection using flexibility from limited sensor information |
| Revised:June 23, 2003 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20053076 |
| KeyWord:damage detection,flexibility matrices,limited measure node |
| LIU Hui~1 QU Wei-lian~ |
|
| Hits: 1318 |
| Download times: 9 |
| Abstract: |
| In this study, an identification technique based on the measured flexibility matrices is developed to assess damage in continuum structure, where the information about incomplete modal data can be directly utilized. The incomplete mode shapes for the damaged structure can be expanded into complete mode shapes by using the actual measured modal readings and assuming the unknown modal data for the remaining dimension. The collected information of the choice sensor placement is optimized according to the ability of collecting structural damage information for each degree of freedom of the structure. Only limited number of structural degree of freedom including plentiful damage information is instrumented. The method of optimizing sensor placement is that sensitivity analysis for modal flexibility is based on the changes in the stiffness only. A computational technique based measure flexibility matrices change is developed for the inverse prediction of structural damage, where both the location and the extent of structural damage can be correctly determined using only a limited amount of measurements of incomplete modal data. At last, numerical examples are utilized to demonstrate the effectiveness of the proposed approach. |
|
|
|