Maintaining Specific Natural Frequency of Damped System despite Mass Modification

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/ijae/volume-2019/1947506/figures/1947506.fig.0011a.svgz" name="1947506.fig.0011a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Exact and modified FRFs after the mass modification</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/ijae/volume-2019/1947506/figures/1947506.fig.0011b.svgz" name="1947506.fig.0011b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Comparison of three methods</td></tr></table>

<div>Comparison of FRFs between original and modified systems with modal damping ratio 3.39%.</div>

International Journal of Aerospace Engineering

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Figure 11

Figure 11: Maintaining Specific Natural Frequency of Damped System despite Mass Modification 