{"id":41466,"date":"2020-03-04T08:14:40","date_gmt":"2020-03-04T08:14:40","guid":{"rendered":"\/forum\/forums\/topic\/linear-buckling-negative-load-multiplier\/"},"modified":"2020-03-04T08:14:40","modified_gmt":"2020-03-04T08:14:40","slug":"linear-buckling-negative-load-multiplier","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/linear-buckling-negative-load-multiplier\/","title":{"rendered":"Linear buckling (negative load multiplier)"},"content":{"rendered":"<p>Hello !<\/p>\n<p><\/p>\n<p>I am working on the buckling of a structure loaded with hydrostatic pressure (see picture). The structure is composed of shell elements. When I plot all the modes, I have negative load multipliers for every modes. I have read that negative load multiplier significate that the reverse applied load would create buckling in the structure. Why do I have just negative load multiplier here ? Does it mean that my structure is well design for buckling ?&nbsp;<\/p>\n<p><\/p>\n<p>I also noticed that modes change with the number of modes used in the analysis settings. Can someone explain me why ?&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/84184e92-c953-419c-8797-ab7400811e09\/b6b3478e-2b6d-44da-a5b7-ab740084ba45_capture.jpg?width=690&amp;upscale=false\" alt=\"structure description\">&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/84184e92-c953-419c-8797-ab7400811e09\/75da1dde-57a6-4e17-91a5-ab740084e186_capture2.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/84184e92-c953-419c-8797-ab7400811e09\/e4e3d1fc-8bf4-410e-b05b-ab740084f0ee_capture3.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>Thank you a lot for your answers !<\/p>\n<p><\/p>\n<p>Zo&euml;<\/p>\n","protected":false},"template":"","class_list":["post-41466","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["13646"],"_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":["5081"],"_bbp_subscription":["248204"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["41466"],"_bbp_forum_id":["27791"],"_bbp_engagement":["22","173979"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["107482"],"_bbp_last_active_id":["107482"],"_bbp_last_active_time":["2020-03-11 13:48:05"]},"test":"zoe69"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/41466","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\/41466\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=41466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}