758 統計的損傷診断法を用いた構造ヘルスモニタリングシステムの実機構造物への適用  [in Japanese] Application of Structural Health Monitoring System with Statistical Damage Diagnosis to Existing Structure  [in Japanese]

The present research proposes a new damage diagnostic method for the structural health monitoring that does not require data of damaged state. Structural health monitoring are a noticeable technology for civil structures. Multiple damage diagnostic method for structural health monitoring has been proposed, but most of them demand data of structure of damaged state and measurement of these data demands much cost. That causes importance of development of the method, which diagnoses damage just from data of the intact state structure. Therefore we purpose new statistical diagnostic method for structural damage detection. In the present method, system identification using a response surface is performed and damage is diagnosed by testing the change of this identified system by statistical test. The new statistic diagnostic method requires data of damaged state structure. As an example, the present study deals structural health monitoring of a jet-fan which installed to a tunnel on an expressway as a ventilator fan. Damages are detected from a change of a set of data measured on tumbuckles of the jet-fan. As a result, the damage of the jet-fan is successfully diagnosed with the method, automatically.