{"id":287581,"date":"2023-06-07T15:12:59","date_gmt":"2023-06-07T15:12:59","guid":{"rendered":"\/forum\/forums\/topic\/foundation-stiffness-definition-for-2d-mass-spring-simulation\/"},"modified":"2023-06-07T15:12:59","modified_gmt":"2023-06-07T15:12:59","slug":"foundation-stiffness-definition-for-2d-mass-spring-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/foundation-stiffness-definition-for-2d-mass-spring-simulation\/","title":{"rendered":"Foundation stiffness definition for 2D mass spring simulation"},"content":{"rendered":"<p>Hi all,<\/p>\n<p>I am trying to simulate fluid-structure interaction in 2D using ANSYS transient Structural and CFX. One can see the tube which should have one head attached to a spring and the other one free (simple mass-spring problem but in 2D). The tube is allowed to move just in the transverse direction. I consider &#8220;Elastic support&#8221; for the attached head. The problem is the unit of spring stiffness that I need to apply is in N\/m but &#8220;Elastic support&#8221; has Foundation Stiffness and the unit is in N\/m3. How should I use Foundation stiffness? considering that in reality, the tube has a length.<\/p>\n<p>Thanks for your thoughts in advance. <img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/06\/07-06-2023-1686150592-2D-Structure.png\" alt=\"\">&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-287581","topic","type-topic","status-closed","hentry","topic-tag-transient-structural"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["29207","170445"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2403"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["287581"],"_bbp_forum_id":["27791"],"_bbp_engagement":["29207","170445"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["287999"],"_bbp_last_active_id":["287999"],"_bbp_last_active_time":["2023-06-09 18:52:16"]},"test":"pegah-mehrabianpolymtl-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/287581","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\/287581\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=287581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}