Experimental and Computational Modal Analyses for Launch Vehicle Models considering Liquid Propellant and Flange Joints

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Filling ratio</td><td class="align_center" colspan="3">0%</td><td class="align_center">25%</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Number of flange joints</td><td class="align_center">24</td><td class="align_center">12</td><td class="align_center">6</td><td class="align_center">24</td></tr><tr><td class="align_left">First bending mode</td><td class="align_center">154.3 Hz</td><td class="align_center">151.4 Hz</td><td class="align_center">140.7 Hz</td><td class="align_center">123.6 Hz</td></tr><tr><td class="align_left">Second bending mode</td><td class="align_center">424.3 Hz</td><td class="align_center">420.7 Hz</td><td class="align_center">420.0 Hz</td><td class="align_center">373.6 Hz</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Summary of the measured natural frequency (modal test results).

International Journal of Aerospace Engineering

tab4

Table 4

Table 4: Experimental and Computational Modal Analyses for Launch Vehicle Models considering Liquid Propellant and Flange Joints 