Research Article
The Modeling Method for Vibration Characteristics Analysis of Composite-Laminated Rotationally Stiffened Plate
Table 4
Frequency parameter Ω of stiffened composite circular sector plate under different boundary and parameter conditions.
| Boundary condition | Angle-ply | ϑ | Modal order | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| SSF | [0°/90°] | 90° | 5.797 | 8.852 | 13.234 | 17.199 | 18.315 | 19.821 | 21.831 | 22.419 | 180° | 5.363 | 6.351 | 7.923 | 9.725 | 9.888 | 12.097 | 12.612 | 14.491 | 270° | 5.092 | 5.781 | 6.572 | 6.915 | 7.630 | 8.873 | 9.255 | 10.250 | [90°/0°/90°] | 90° | 4.619 | 8.080 | 12.924 | 13.823 | 18.832 | 18.898 | 19.251 | 19.916 | 180° | 4.161 | 5.294 | 7.066 | 9.224 | 9.469 | 11.680 | 12.183 | 13.681 | 270° | 4.023 | 4.628 | 5.557 | 6.580 | 6.744 | 8.113 | 8.668 | 9.628 |
| CCF | [0°/90°] | 90° | 8.207 | 11.190 | 15.607 | 18.583 | 20.855 | 22.816 | 23.771 | 26.580 | 180° | 7.634 | 8.732 | 10.026 | 10.209 | 12.106 | 12.698 | 14.291 | 16.709 | 270° | 6.260 | 8.199 | 8.282 | 8.935 | 9.300 | 9.919 | 11.098 | 12.436 | [90°/0°/90°] | 90° | 6.536 | 10.139 | 15.326 | 16.746 | 19.513 | 21.686 | 22.733 | 23.480 | 180° | 6.032 | 7.157 | 8.927 | 9.660 | 11.140 | 12.303 | 13.704 | 16.560 | 270° | 5.633 | 6.505 | 6.961 | 7.392 | 8.574 | 8.695 | 9.955 | 11.511 |
| CCC | [0°/90°] | 90° | 9.601 | 13.684 | 18.862 | 23.991 | 24.864 | 30.352 | 31.681 | 37.238 | 180° | 8.234 | 9.531 | 11.272 | 13.558 | 15.804 | 18.717 | 21.293 | 22.849 | 270° | 7.912 | 8.573 | 9.471 | 10.608 | 11.907 | 12.856 | 13.393 | 14.946 | [90°/0°/90°] | 90° | 8.337 | 13.307 | 19.553 | 19.834 | 27.063 | 27.566 | 34.966 | 36.190 | 180° | 6.549 | 8.111 | 10.226 | 12.775 | 15.615 | 16.757 | 18.889 | 19.482 | 270° | 6.196 | 6.957 | 8.042 | 9.393 | 10.911 | 12.562 | 12.661 | 14.496 |
| | [0°/90°] | 90° | 1.041 | 3.963 | 4.724 | 5.332 | 6.067 | 7.035 | 7.982 | 9.027 | 180° | 0.785 | 3.826 | 4.030 | 4.472 | 5.062 | 5.310 | 5.813 | 6.732 | 270° | 0.669 | 3.788 | 3.855 | 4.088 | 4.385 | 4.757 | 5.200 | 5.300 | [90°/0°/90°] | 90° | 1.026 | 3.563 | 4.147 | 4.610 | 6.208 | 7.162 | 7.765 | 8.587 | 180° | 0.771 | 3.393 | 3.730 | 4.112 | 4.316 | 5.048 | 5.982 | 6.920 | 270° | 0.653 | 3.344 | 3.493 | 3.818 | 4.102 | 4.212 | 4.680 | 5.235 |
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