Structural Health Monitoring Based on Combined Structural Global and Local Frequencies

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="405784.fig.004a" src="https://static.hindawi.com/articles/mpe/volume-2014/405784/figures/405784.fig.004a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Frequency responses</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="405784.fig.004b" src="https://static.hindawi.com/articles/mpe/volume-2014/405784/figures/405784.fig.004b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Contour line</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="405784.fig.004c" src="https://static.hindawi.com/articles/mpe/volume-2014/405784/figures/405784.fig.004c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Frequency responses in 6 groups of different added masses</td></tr></table></td></tr></table>

<table>The in-plane frequency response after adding masses.</table>

Mathematical Problems in Engineering

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Figure 4

Figure 4: Structural Health Monitoring Based on Combined Structural Global and Local Frequencies 