{"id":286508,"date":"2023-05-31T10:54:16","date_gmt":"2023-05-31T10:54:16","guid":{"rendered":"\/forum\/forums\/reply\/286508\/"},"modified":"2023-05-31T10:54:16","modified_gmt":"2023-05-31T10:54:16","slug":"286508","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/286508\/","title":{"rendered":"Reply To: multilayered tubing with oxide layers"},"content":{"rendered":"<p>&lt;p&gt;The authors of the journal article do not understand Modal analysis and should not have included the deformation in Tables 7 and 8. Have you taken the free course on Modal analysis yet?&lt;\/p&gt;&lt;p&gt;There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. You can use Modal analysis, Harmonic Resposne analysis or Random Vibration analysis. Modal does not take any input load, which is why the deformation output magnitude should not be used the way it was in that paper. The modal deformation is only to understand the mode shape, the magnitude is arbitrary.&lt;\/p&gt;&lt;p&gt;Random Vibration analysis takes a PSD input load and computes the 1 sigma deformation in the structure. You can plot the response (output) PSD of a vertex. Take the free course in Random Vibration.&lt;\/p&gt;&lt;p&gt;<a href=\"\/courses\/index.php\/courses\/random-vibration-analysis\/\">\/courses\/index.php\/courses\/random-vibration-analysis\/<\/a>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-286508","reply","type-reply","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=\"The authors of the journal article do not understand Modal analysis and should not have included the deformation in Tables 7 and 8. Have you taken the free course on Modal analysis yet?There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. You can use Modal analysis,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/286508\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: multilayered tubing with oxide layers | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"The authors of the journal article do not understand Modal analysis and should not have included the deformation in Tables 7 and 8. Have you taken the free course on Modal analysis yet?There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. You can use Modal analysis,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/286508\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-05-31T10:54:16+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-05-31T10:54:16+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: multilayered tubing with oxide layers | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"The authors of the journal article do not understand Modal analysis and should not have included the deformation in Tables 7 and 8. 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Have you taken the free course on Modal analysis yet?There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. 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Have you taken the free course on Modal analysis yet?There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. You can use Modal analysis,","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/286508\/","article:published_time":"2023-05-31T10:54:16+00:00","article:modified_time":"2023-05-31T10:54:16+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: multilayered tubing with oxide layers | Ansys Learning Forum","twitter:description":"The authors of the journal article do not understand Modal analysis and should not have included the deformation in Tables 7 and 8. Have you taken the free course on Modal analysis yet?There are many ways you can show that corroded pipes have a frequency shift compared with uncorroded pipes. 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