1 / 21

VIBRATION OF A BOX PANEL BEM

VIBRATION OF A BOX PANEL BEM. Panels of Varying Thickness. Prescribed motion displacement. Y1 surface. Z1 surface. X1 surface. Prescribed motion in X direction only(displacement). Modal Frequencies Box Panel. |------ frequency -----|

bconley
Download Presentation

VIBRATION OF A BOX PANEL BEM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. VIBRATION OF A BOX PANEL BEM Panels of Varying Thickness Prescribed motion displacement

  2. Y1 surface Z1 surface X1 surface

  3. Prescribed motion in X direction only(displacement)

  4. Modal Frequencies Box Panel |------ frequency -----| MODE EIGENVALUE RADIANS CYCLES PERIOD 1 2.871812E+02 1.694642E+01 2.697107E+00 3.707677E-01 2 4.988071E+02 2.233399E+01 3.554565E+00 2.813284E-01 3 7.727191E+02 2.779783E+01 4.424161E+00 2.260315E-01 4 1.501808E+03 3.875317E+01 6.167759E+00 1.621334E-01 5 1.632331E+03 4.040211E+01 6.430196E+00 1.555163E-01 6 2.075580E+03 4.555854E+01 7.250867E+00 1.379146E-01 7 2.602766E+03 5.101731E+01 8.119657E+00 1.231579E-01 8 2.887857E+03 5.373878E+01 8.552793E+00 1.169209E-01 9 3.355013E+03 5.792247E+01 9.218648E+00 1.084758E-01 10 3.473548E+03 5.893681E+01 9.380085E+00 1.066088E-01 11 4.117317E+03 6.416632E+01 1.021239E+01 9.792030E-02 12 4.627150E+03 6.802316E+01 1.082622E+01 9.236833E-02 13 4.886561E+03 6.990394E+01 1.112556E+01 8.988314E-02 14 5.079631E+03 7.127153E+01 1.134322E+01 8.815842E-02 15 5.627496E+03 7.501663E+01 1.193927E+01 8.375723E-02 16 5.687220E+03 7.541366E+01 1.200246E+01 8.331628E-02 17 6.192881E+03 7.869486E+01 1.252468E+01 7.984238E-02 18 6.661664E+03 8.161902E+01 1.299007E+01 7.698188E-02 19 7.675920E+03 8.761233E+01 1.394394E+01 7.171577E-02 20 8.130169E+03 9.016745E+01 1.435060E+01 6.968352E-02 21 8.788604E+03 9.374755E+01 1.492039E+01 6.702239E-02 22 9.092576E+03 9.535500E+01 1.517622E+01 6.589256E-02 23 9.275712E+03 9.631050E+01 1.532829E+01 6.523884E-02 24 1.013600E+04 1.006777E+02 1.602335E+01 6.240891E-02 25 1.041560E+04 1.020568E+02 1.624285E+01 6.156555E-02 26 1.160306E+04 1.077175E+02 1.714377E+01 5.833021E-02 27 1.259114E+04 1.122102E+02 1.785881E+01 5.599476E-02 28 1.288281E+04 1.135024E+02 1.806448E+01 5.535727E-02 29 1.358382E+04 1.165496E+02 1.854945E+01 5.390995E-02 30 1.478767E+04 1.216046E+02 1.935397E+01 5.166898E-02 |------ frequency -----| MODE EIGENVALUE RADIANS CYCLES PERIOD 31 1.489398E+04 1.220409E+02 1.942341E+01 5.148425E-02 32 1.566797E+04 1.251718E+02 1.992171E+01 5.019651E-02 33 1.680650E+04 1.296399E+02 2.063283E+01 4.846646E-02 34 1.816798E+04 1.347887E+02 2.145228E+01 4.661509E-02 35 1.851377E+04 1.360653E+02 2.165547E+01 4.617771E-02 36 1.866304E+04 1.366127E+02 2.174259E+01 4.599267E-02 37 2.049267E+04 1.431526E+02 2.278345E+01 4.389151E-02 38 2.130159E+04 1.459506E+02 2.322876E+01 4.305007E-02 39 2.207799E+04 1.485866E+02 2.364830E+01 4.228634E-02 40 2.374664E+04 1.540995E+02 2.452569E+01 4.077357E-02 41 2.391486E+04 1.546443E+02 2.461241E+01 4.062992E-02 42 2.574751E+04 1.604603E+02 2.553805E+01 3.915726E-02 43 2.597176E+04 1.611576E+02 2.564902E+01 3.898784E-02 44 2.694971E+04 1.641637E+02 2.612746E+01 3.827391E-02 45 2.902939E+04 1.703801E+02 2.711684E+01 3.687745E-02 46 3.092217E+04 1.758470E+02 2.798692E+01 3.573097E-02 47 3.207903E+04 1.791062E+02 2.850564E+01 3.508078E-02 48 3.245110E+04 1.801419E+02 2.867047E+01 3.487909E-02 49 3.247906E+04 1.802195E+02 2.868282E+01 3.486407E-02 50 3.374789E+04 1.837060E+02 2.923772E+01 3.420240E-02 51 3.407169E+04 1.845852E+02 2.937765E+01 3.403949E-02 52 3.449804E+04 1.857365E+02 2.956088E+01 3.382849E-02 53 3.662876E+04 1.913864E+02 3.046010E+01 3.282984E-02 54 3.793160E+04 1.947604E+02 3.099707E+01 3.226111E-02 55 3.861533E+04 1.965078E+02 3.127520E+01 3.197422E-02 56 3.972890E+04 1.993211E+02 3.172294E+01 3.152293E-02 57 4.053347E+04 2.013292E+02 3.204255E+01 3.120851E-02 58 4.092619E+04 2.023022E+02 3.219740E+01 3.105841E-02 59 4.096746E+04 2.024042E+02 3.221363E+01 3.104276E-02 60 4.324497E+04 2.079543E+02 3.309695E+01 3.021427E-02

  5. Identifying Panels - Noise and Frequency Contribution eg [A-X1] panel A - X1 surface eg [A-X1] panel A - X1 surface B-X2 F-Z2 E-Z1 E-Z1 D-Y2 D-Y2 A-X1 C-Y1 C-Y1 F-Z2 F-Z2 B-X2 Largest panel contributers to noise A-X1

  6. eg [A-X1] panel A - X1 surface eg [A-X1] panel A - X1 surface eg [A-X1] panel A - X1 surface eg [A-X1] panel A - X1 surface C-Y1 C-Y1 F-Z2 E-Z1 E-Z1 F-Z2 F-Z2 F-Z2 C-Y1 D-Y2 D-Y2 E-Z1

  7. eg [A-X1] panel A - X1 surface E-Z1 C-Y1 E-Z1 D-Y2 F-Z2

  8. Overall SPL at the three field points Forcing frequency 18Hz

More Related