{"id":42928,"date":"2020-04-18T12:52:38","date_gmt":"2020-04-18T12:52:38","guid":{"rendered":"\/forum\/forums\/topic\/do-i-need-to-filter-node-acceleration-data-from-explicit-dynamics-before-generating-srs\/"},"modified":"2020-04-18T12:52:38","modified_gmt":"2020-04-18T12:52:38","slug":"do-i-need-to-filter-node-acceleration-data-from-explicit-dynamics-before-generating-srs","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/do-i-need-to-filter-node-acceleration-data-from-explicit-dynamics-before-generating-srs\/","title":{"rendered":"Do I need to filter node acceleration data from Explicit Dynamics before generating SRS?"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I am doing an impact shock analysis on a plate using Explicit Dynamics. I want to generate SRS in MATLAB from the acceleration-time history of a node. My sampling rate is about 1e-6. I read in a different post (<a href=\"\/thread\/impact-testing-1\/\">link<\/a>) that &#8220;Explicit Dynamics acceleration results are often noisy so you need to filter the data&#8221;. However, I&#8217;m not sure if the solution suggested is the correct one for my application.<\/p>\n<p><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/ab68b856-cd33-4dd4-b069-aa2400d3d28c\/8bfc519b-34da-4136-a811-aba100d167ab_capture.jpg?width=690&amp;upscale=false\" alt=\"\" width=\"382\" height=\"223\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/ab68b856-cd33-4dd4-b069-aa2400d3d28c\/7d4c27d4-081a-4221-8cbf-aba100d1de88_capture2.jpg?width=690&amp;upscale=false\" alt=\"\" width=\"288\" height=\"321\"><\/p>\n<p><\/p>\n<p>As you can see I&#8217;m using symmetry and I am using velocity initial condition on the impactor, which is placed close to the plate, but not touching. I am using remote displacement to constrain Ux, Uy, Uz of the corners of the plate. (The mesh is coarse for short solving time).<\/p>\n<p><\/p>\n<p>I have the vibrationdata GUI by Tom Irvine. I have tried to use the Butterworth filter, and it does change the SRS slightly. I only have basic knowledge of filtering. How does my output acceleration data look? If some sort of data processing is necessary, what would you recommend?<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Thank you in advance,&nbsp;<\/p>\n<p><\/p>\n<p>Vebjorn<\/p>\n","protected":false},"template":"","class_list":["post-42928","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["15109"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["861"],"_bbp_subscription":["239644"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["42928"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","164135"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["111963"],"_bbp_last_active_id":["111963"],"_bbp_last_active_time":["2020-04-21 15:08:58"]},"test":"vebjorns"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/42928","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\/42928\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=42928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}