Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method

<div>Time-varying modal shape vectors of the Pacoima dam using the strong-motion records of the Newhall earthquake (dash line represents the original arch circle, and blue line represents the modal shape): (a) mode 1; (b) mode 2.</div>

Shock and Vibration

fig20

Figure 20

Figure 20: Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method 