{"id":381362,"date":"2024-09-02T16:47:44","date_gmt":"2024-09-02T16:47:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/few-queries-about-output-quantities-of-random-vibration-in-ansys-mechanical\/"},"modified":"2024-09-02T16:52:20","modified_gmt":"2024-09-02T16:52:20","slug":"few-queries-about-output-quantities-of-random-vibration-in-ansys-mechanical","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/few-queries-about-output-quantities-of-random-vibration-in-ansys-mechanical\/","title":{"rendered":"Few queries about output quantities of Random Vibration in Ansys Mechanical"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hello all,&lt;\/p&gt;&lt;p&gt;1.when we see the output quantities like von mises stress contour plot in random vibration as like in Harmonic we can see this value at perticular frequncy but in Random vibration is not availble due to randomness of input, so does it mean its an average or RMS value for given PSD spetcra? (bit confuesed with 1 sigma, 2 sigma , 3 sigma and RMS)&lt;\/p&gt;&lt;p&gt;2. When we see the Acceleration Response PSD output at any location in terms of G, it gives RMS value with graph showing energy content over PSD, as i have checked that directional acceleration values shown In contour plot with 1 sigma are equal to the RMS values shown in Response PSD.&nbsp; Does it mean the 1 sigma&nbsp; directional acceleration value from contour plot is&nbsp; nothing but GRMS value for given location?&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-381362","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello all,1.when we see the output quantities like von mises stress contour plot in random vibration as like in Harmonic we can see this value at perticular frequncy but in Random vibration is not availble due to randomness of input, so does it mean its an average or RMS value for given PSD spetcra? 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