An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/693612/figures/693612.fig.0038a.svgz" name="693612.fig.0038a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>IMF components</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/693612/figures/693612.fig.0038b.svgz" name="693612.fig.0038b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>IMF components spectrum</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/693612/figures/693612.fig.0038c.svgz" name="693612.fig.0038c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Hilbert energy spectrum</td></tr><tr class="fig-image" id="d"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/693612/figures/693612.fig.0038d.svgz" name="693612.fig.0038d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Hilbert marginal spectrum</td></tr></table>

<div>HHT analysis results of working condition 43.</div>

Shock and Vibration

fig38

Figure 38

Figure 38: An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions 