{"id":343194,"date":"2024-01-04T15:23:31","date_gmt":"2024-01-04T15:23:31","guid":{"rendered":"\/forum\/forums\/reply\/343194\/"},"modified":"2024-01-04T15:23:31","modified_gmt":"2024-01-04T15:23:31","slug":"343194","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/343194\/","title":{"rendered":"Reply To: MODAL ANALYSIS"},"content":{"rendered":"<p>&lt;p&gt;Hi Antony, to clarify I mean run the analysis with the pipe in contact and again without contact, that way you will know the two possible natural frequencies of the system.&nbsp; I assume the freqencies are needed to check for resonance.&nbsp; This will likely be the quickest way.&lt;\/p&gt;&lt;p&gt;If you want to do a dynamic analysis, you will need to vibrate the model and review the behaviour.&nbsp; For e.g. seismic applications, the input frequency-displacement or acceleration spectra are known and applied at the supports and the response of the model is reviewed.&nbsp; An explicit dynamic analysis can take a long time to run since it needs lots of small timesteps.&nbsp; The results may also be affected by the direction of the input spectra, so various input spectra may need to be run.&nbsp; A large displacement implicit analysis may be quicker, but can still take a long time to analyse.&nbsp; It can be a lot of work and take a lot of postprocessing, hence I would stick with the linear option if possible.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-343194","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/343194","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/343194\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=343194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}