{"id":477,"date":"2020-02-28T11:41:46","date_gmt":"2020-02-28T19:41:46","guid":{"rendered":"http:\/\/gantovnik.com\/bio-tips\/?p=477"},"modified":"2021-10-27T12:15:51","modified_gmt":"2021-10-27T19:15:51","slug":"extract-eigenvalues-from-nastran-f06-file","status":"publish","type":"post","link":"https:\/\/gantovnik.com\/bio-tips\/2020\/02\/extract-eigenvalues-from-nastran-f06-file\/","title":{"rendered":"#68 Extract eigenvalues from Nastran f06 file"},"content":{"rendered":"<p>grep -i -A 26 &#8216;R E A L E I G E N V A L U E S&#8217; my_fem.f06 > eigenvalues.txt<\/p>\n","protected":false},"excerpt":{"rendered":"<p>grep -i -A 26 &#8216;R E A L E I G E N V A L U E S&#8217; my_fem.f06 > eigenvalues.txt<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_lmt_disableupdate":"yes","_lmt_disable":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-477","post","type-post","status-publish","format-standard","hentry","category-bash"],"modified_by":"gantovnik","jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8bH0k-7H","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":642,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/102-what-is-maximum-value-of-constraints-column-in-iteration-history-for-sol200\/","url_meta":{"origin":477,"position":0},"title":"#102: What is &#8220;Maximum Value of Constraints&#8221; column in iteration history for SOL200?","author":"gantovnik","date":"2020-09-25","format":false,"excerpt":"#102: What is \"Maximum Value of Constraints\" column in iteration history for SOL200? Answer: This refers to the maximum normalized constraint over all constraints in the design model. A positive value indicates constraint violation, a negative value constraint satisfaction, and a near zero value a critical constraint. Normalized constraints are\u2026","rel":"","context":"In &quot;nastran&quot;","block_context":{"text":"nastran","link":"https:\/\/gantovnik.com\/bio-tips\/category\/nastran\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":900,"url":"https:\/\/gantovnik.com\/bio-tips\/2021\/02\/162-loops-using-command-line-in-bash\/","url_meta":{"origin":477,"position":1},"title":"#162 Loops using command line in bash","author":"gantovnik","date":"2021-02-19","format":false,"excerpt":"With increment: Output: Output: C-like syntax: Output: Output: Output: Output: Output: Output:","rel":"","context":"In &quot;bash&quot;","block_context":{"text":"bash","link":"https:\/\/gantovnik.com\/bio-tips\/category\/bash\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":651,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/106-nonlinear-buckling-sol106\/","url_meta":{"origin":477,"position":2},"title":"#106: Nonlinear Buckling in MSC Nastran (SOL106)","author":"gantovnik","date":"2020-09-25","format":false,"excerpt":"#106: Nonlinear Buckling (SOL106) 1) Linear buckling of Euler column. For clamped-free boundary conditions the critical load is: Pcrit = (pi**2)*E*I\/(4*(L**2)), where, E = 10.5E6, I = 8.333-5, L=10 means Pcrit = 21.59 2) Nonlinear buckling with PARAM,BUCKLE,2 In f06 result file search for following message (right after eigenvalue table).\u2026","rel":"","context":"In &quot;buckling&quot;","block_context":{"text":"buckling","link":"https:\/\/gantovnik.com\/bio-tips\/category\/buckling\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":679,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/118-how-can-i-get-mass-of-model-in-f06\/","url_meta":{"origin":477,"position":3},"title":"#118: How to get mass of model in f06?","author":"gantovnik","date":"2020-09-28","format":false,"excerpt":"#117: How to get mass of model in f06? Case control entry: WEIGHTCHECK=YES p.s. This entry has much more options than to use older option PARAM,GRDPNT, 0 Output:","rel":"","context":"In &quot;python&quot;","block_context":{"text":"python","link":"https:\/\/gantovnik.com\/bio-tips\/category\/python\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":857,"url":"https:\/\/gantovnik.com\/bio-tips\/2021\/02\/153-how-many-words-have-four-consecutive-vowels-using-grep\/","url_meta":{"origin":477,"position":4},"title":"#153 How many words have four consecutive vowels using grep?","author":"gantovnik","date":"2021-02-09","format":false,"excerpt":"#153 How many words have four consecutive vowels using grep? The square brackets mean list. The search is for the letter a or e or i or o or u. Then we add the brace brackets at the end enables multipliers. Having just the number 4 in the braces indicates\u2026","rel":"","context":"In &quot;bash&quot;","block_context":{"text":"bash","link":"https:\/\/gantovnik.com\/bio-tips\/category\/bash\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":675,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/116-interpretation-of-the-gap-contact-status-in-nastran-f06-file\/","url_meta":{"origin":477,"position":5},"title":"#116: Interpretation of the GAP contact status in Nastran f06 file?","author":"gantovnik","date":"2020-09-28","format":false,"excerpt":"#116: Interpretation of the GAP contact status in Nastran f06 file? Gap contact status values are 1) Open = gap open (with or without friction) 2) Slide = gap closed in the absence of friction 3) Stick = gap closed in the presence of friction and (Fy**2 + Fz**2) (MUk\u2026","rel":"","context":"In &quot;nastran&quot;","block_context":{"text":"nastran","link":"https:\/\/gantovnik.com\/bio-tips\/category\/nastran\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/comments?post=477"}],"version-history":[{"count":0,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/477\/revisions"}],"wp:attachment":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/media?parent=477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/categories?post=477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/tags?post=477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}