{"id":169784,"date":"2022-05-25T08:48:56","date_gmt":"2022-05-25T08:48:56","guid":{"rendered":"\/forum\/forums\/topic\/questions-regarding-boundary-condition-setting-and-random-vibration-analysis-pressure-excitation\/"},"modified":"2023-05-16T12:00:10","modified_gmt":"2023-05-16T12:00:10","slug":"questions-regarding-boundary-condition-setting-and-random-vibration-analysis-pressure-excitation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/questions-regarding-boundary-condition-setting-and-random-vibration-analysis-pressure-excitation\/","title":{"rendered":"Questions regarding Boundary condition setting and Random Vibration Analysis (pressure excitation)"},"content":{"rendered":"<p>I have a question. The EXPLANATION for random vibration analysis in the ANSYS help is as the following: &#8220;The excitation is applied in the specified direction to all entities that have a Fixed Support boundary Condition. Other support points in a structure such as Frictionless Surface are not excited by the PSD &#8220;. I&#8217;m not sure if all entities mean the whole model or just nodes with fixed boundaries. In other words, random excitations only exist at fixed boundaries and affect the whole model, or the whole model node is applied with random excitations but some face boundaries are fixed. For example, the top and bottom surfaces of a cylinder are fixed, and the side face have random excitation due to fluid action. Can the model be analyzed using the Random Vibration module in the Ansys Workbench\uff1f\u00a0<\/p>\n<p>I&#8217;m actually analyzing a compressor blade. The blade shroud and hub face are fixed boundaries, and random loads of airflow on the pressure surface and suction surface. If Random Vibration module in Ansys Workbench is not available to solve the problem. What software modules or methods should I use\uff1f\u00a0<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/455\/QEIFBRR0I7I4.png\" width=\"416\" height=\"747\" \/><\/p>\n","protected":false},"template":"","class_list":["post-169784","topic","type-topic","status-closed","hentry","topic-tag-ansys-workbench","topic-tag-random-vibration"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["2115"],"_bbp_likes_count":["0"],"_bbp_subscription":["256854"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["169784"],"_bbp_forum_id":["27791"],"_bbp_engagement":["58821","256854"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["215493"],"_bbp_last_active_id":["215493"],"_bbp_last_active_time":["2022-05-26 07:32:34"]},"test":"majiaobingmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/169784","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/169784\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=169784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}