Free Vibration Analysis of Symmetrically Laminated Folded Plate Structures Using an Element-Free Galerkin Method

<table class="table-group" id="tab9"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td align="left">Modes</td><td align="center">Present results</td><td align="center">ANSYS results </td><td align="center">Relative errors</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td align="left">1</td><td align="center">8.10352</td><td align="center">8.01745</td><td align="center">1.1%</td></tr><tr><td align="left">2</td><td align="center">8.10352</td><td align="center">8.01745</td><td align="center">1.1%</td></tr><tr><td align="left">3</td><td align="center">10.01294</td><td align="center">9.86091</td><td align="center">1.5%</td></tr><tr><td align="left">4</td><td align="center">13.70969</td><td align="center">13.49473</td><td align="center">1.6%</td></tr><tr><td align="left">5</td><td align="center">15.17441</td><td align="center">14.93191</td><td align="center">1.6%</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Dimensionless free vibration frequencies of the laminated shell (Figure <a href="../fig21/#a">21(a)</a>).

Mathematical Problems in Engineering

tab9

Table 9

Table 9: Free Vibration Analysis of Symmetrically Laminated Folded Plate Structures Using an Element-Free Galerkin Method 