{"id":363151,"date":"2024-04-19T08:57:44","date_gmt":"2024-04-19T08:57:44","guid":{"rendered":"\/forum\/forums\/topic\/verifying-my-result-from-ls-dyna\/"},"modified":"2024-04-19T08:57:44","modified_gmt":"2024-04-19T08:57:44","slug":"verifying-my-result-from-ls-dyna","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/verifying-my-result-from-ls-dyna\/","title":{"rendered":"Verifying my result from LS DYNA"},"content":{"rendered":"<p>Hello!<\/p>\n<p>I am simulating a drone hitting a pitch link of a helicopter with a velocity of 30 m\/s in the middle of the link.<\/p>\n<p>Im having a few problems with verifying my results with handwritten calculation. I am considering the pitch link (a solid rod) a beam so that I may use beam theory. The link is fixed in both ends which would make the equation for maximum deformation in the middle:<\/p>\n<p>(F*L^3)\/(192*E*I)<\/p>\n<p>The drone is made out of Expanded polypropylene foam which has spring properties and should reduce the impact force F acting upon the link.<\/p>\n<p>Right now I am using the formula for impact force F = (m*deltaV) \/ impact time&nbsp;<\/p>\n<p>but i also wanna know how i should subtract the spring force upon the drone.<\/p>\n<p>I am using 0,001 s as impact time and deltaV= 30 m\/s.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-363151","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["342115","88"],"_bbp_author_ip":["23.206.193.41"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["263"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["363151"],"_bbp_forum_id":["27814"],"_bbp_engagement":["88","342115"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["364081"],"_bbp_last_active_id":["364081"],"_bbp_last_active_time":["2024-04-25 05:43:45"]},"test":"mansmochalmers-se"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/363151","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\/363151\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=363151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}