https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/243379/sequence-of-rayleigh-commandCould you please let me know why placing the &quot;Calculation Rayleigh Frequency&quot; command in a different location within a load case makes a big difference in results. Please take a look at the two files attached. The frequency command is placed at the enden-USTelligent Community 12https://communities.bentley.com/thread/762268?ContentTypeID=1Mon, 17 Apr 2023 15:22:55 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:6674225b-c125-4ca7-b719-9d4056c103bcKasidit Chansawat<p>Thank you for responding to my question!</p><div style="clear:both;"></div>https://communities.bentley.com/thread/759169?ContentTypeID=1Mon, 27 Mar 2023 07:25:53 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:13e4712c-00c8-4b8f-87e8-be824c76a720Modestas<p>The Rayleigh frequency command considers the loads which are entered above that command.&nbsp;<span>The frequency calculated estimates the frequency as if the structure were constrained to vibrate in the static deflected shape generated by the loads in the load case which are above that command. So in your models, different loads are considered&nbsp;during the frequency calculation due to different location of the Rayleigh command.</span></p><div style="clear:both;"></div>