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7.3 Academic Example                                      125



                                 frequencies  and  the  corresponding  mode  shapes.    It  is  noted  that
                                 this  example  is  a  classical  problem  often  used  to  study  plate
                                 vibration because their exact solutions are available.  Understand-
                                 ing  their  solution  behaviors  will  provide  confidence  prior  to
                                 analyzing problems with more complicated geometry.

                                             Y






                                                      1Kg/m 3
                                                   E   10.92 10 N/m 2
                                                            
                                                               6
                                                   v   0.3                1m
                                                   h   0.01 m



                                                                                 X
                                                           1m


                                  (a)  Starting ANSYS Workbench

                                      Open the ANSYS Workbench, set the Units menu on the
                                                                  
                                        upper tab to Metric (kg,m,s, C,A,N,V).
                                      On  the  Analysis  Systems  window,  click  twice  on  the
                                        Modal item.  A new small box will appear on the Project
                                        Schematic window.
                                      Retype the name in the lower blue tab as the desired project
                                        name, e.g., Plate Modal Analysis, and hit Enter.
                                      Right  click  on  the  Engineering  Data tab and  select  the
                                        Edit…  option,  the  A2:  Engineering  Data  window  will
                                        pop-up.    Double  click  on  Click  here  to  add  a  new
                                        material and type in a new material name, e.g., “My Plate
                                        Material”, and hit Enter.
                                      Click at the Density under Physical Properties and drag it
                                        to the Property list at the bottom of the window.  Enter the
                                        Density value as 1 and hit Enter.
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