The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/sv/volume-2016/4709257/figures/4709257.fig.008a.svgz" name="4709257.fig.008a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>The raw sweep signal</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/sv/volume-2016/4709257/figures/4709257.fig.008b.svgz" name="4709257.fig.008b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The spectrum by direct FFT</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/sv/volume-2016/4709257/figures/4709257.fig.008c.svgz" name="4709257.fig.008c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>The spectrum by small-segment FFT</td></tr></table>

<div>The 3rd natural frequency of CTCS obtained by different FFT processing techniques.</div>

Shock and Vibration

fig8

Figure 8

Figure 8: The Influence on Modal Parameters of Thin Cylindrical Shell under Bolt Looseness Boundary 