{"id":39570,"date":"2019-12-12T13:37:26","date_gmt":"2019-12-12T13:37:26","guid":{"rendered":"\/forum\/forums\/topic\/modal-hammer-difference-in-the-results-of-the-experiment-and-transient-structural-analysis\/"},"modified":"2019-12-12T13:37:26","modified_gmt":"2019-12-12T13:37:26","slug":"modal-hammer-difference-in-the-results-of-the-experiment-and-transient-structural-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modal-hammer-difference-in-the-results-of-the-experiment-and-transient-structural-analysis\/","title":{"rendered":"Modal hammer. Difference in the results of the experiment and transient structural analysis"},"content":{"rendered":"

Hello.<\/p>\n

<\/p>\n

I am a beginner in modal analysis. I’m trying to simulate a hammer impact test on a steel bar.<\/p>\n

<\/p>\n

I did research with a modal hammer and now I want to try to do the same in Transient Structural. Acceleration results from Transient Structural analysis in places of accelerator gluing are very different from the results obtained in the tests. The test stand is shown in Fig. 1. The rod is attached to the steel plate with a neodymium manesque. Accelerometers are attached to the top of the rod.<\/p>\n

<\/p>\n

\"Fig.<\/p>\n

<\/p>\n

                                                  Fig. 1<\/p>\n

<\/p>\n

In the Transient Structural analysis I added the load I received from the tests (Fig. 2), Δt = 0.00004 s. Rod attachment as a fixed support.<\/p>\n

<\/p>\n

\"Fig.<\/p>\n

<\/p>\n

                                                                             Fig. 2<\/p>\n

<\/p>\n

What am I doing wrong?<\/p>\n

<\/p>\n

Thank you in advance for your help.<\/p>\n","protected":false},"template":"","class_list":["post-39570","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["11749"],"_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":["1119"],"_bbp_subscription":["245757"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["39570"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","75551","156586"],"_bbp_voice_count":["3"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["100823"],"_bbp_last_active_id":["100823"],"_bbp_last_active_time":["2019-12-15 10:15:03"]},"test":"mkosin"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/39570","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\/39570\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=39570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}