{"id":357041,"date":"2024-03-14T09:20:55","date_gmt":"2024-03-14T09:20:55","guid":{"rendered":"\/forum\/forums\/reply\/357041\/"},"modified":"2024-03-14T09:25:30","modified_gmt":"2024-03-14T09:25:30","slug":"357041","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/","title":{"rendered":"Reply To: Arbitrary sign for eigen mode"},"content":{"rendered":"<p>&lt;p&gt;I&#8217;m running on a Windows 11 Pro 23H2.&lt;\/p&gt;&lt;p&gt;You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.&lt;br&gt;Here I moved the solver region so the coordinates of the mode won&rsquo;t change.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<code>&lt;br&gt;clc;&lt;br&gt;cleardcard;&lt;br&gt;closeall;&lt;br&gt;newproject;&lt;br&gt;## design&lt;br&gt;addrect;&lt;br&gt;set(\"x\",0);set(\"x span\",1e-6);&lt;br&gt;set(\"y\",0);set(\"y span\",1e-6);&lt;br&gt;set(\"z\",0);set(\"z span\",0.2e-6);&lt;br&gt;set(\"material\", \"Si (Silicon) - Palik\");&lt;br&gt;## solver&lt;br&gt;addfde;&lt;br&gt;set(\"solver type\", \"2D X normal\");&lt;br&gt;set(\"x\",0);&lt;br&gt;set(\"y\",0);set(\"y span\",2e-6);&lt;br&gt;set(\"z\",0);set(\"z span\",1e-6);&lt;br&gt;set(\"number of trial modes\", 3);&lt;br&gt;set(\"mesh cells z\", 50);&lt;br&gt;set(\"mesh cells y\", 50);&lt;br&gt;## get mode&lt;br&gt;K = 5;&lt;br&gt;for (k=0:K){&lt;br&gt;&nbsp; &nbsp; setnamed(\"FDE\", \"y\", (k\/K-0.5)*0.5e-6);&lt;br&gt;&nbsp; &nbsp; #setnamed(\"rectangle\", \"y\", (k\/K-0.5)*0.5e-6);&lt;br&gt;&nbsp; &nbsp; findmodes;&lt;br&gt;&nbsp; &nbsp; copydcard(\"mode2\", \"m\"+num2str(k));&lt;br&gt;&nbsp; &nbsp; switchtolayout;&lt;br&gt;}&lt;br&gt;## get neff and expand modes&lt;br&gt;neff_list = matrix(K);&lt;br&gt;Smat = matrix(K,K);&lt;br&gt;for (k=1:K){&lt;br&gt;&nbsp; &nbsp; neff_list(k) = getdata(\"m\"+num2str(k), \"neff\");&lt;br&gt;&nbsp; &nbsp; for (j=1:K){&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; X = expand(\"m\"+num2str(k),\"m\"+num2str(j));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; Smat(j,k) = X(1); # should be 1&lt;br&gt;&nbsp; &nbsp; }&lt;br&gt;}&lt;br&gt;## modes have minus signs&lt;br&gt;image(real(Smat));&lt;br&gt;<\/code>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-357041","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(&quot;x&quot;,0);set(&quot;x span&quot;,1e-6);set(&quot;y&quot;,0);set(&quot;y span&quot;,1e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,0.2e-6);set(&quot;material&quot;, &quot;Si (Silicon) - Palik&quot;);## solveraddfde;set(&quot;solver type&quot;, &quot;2D X normal&quot;);set(&quot;x&quot;,0);set(&quot;y&quot;,0);set(&quot;y span&quot;,2e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,1e-6);set(&quot;number of trial\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I&#039;m running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(&quot;x&quot;,0);set(&quot;x span&quot;,1e-6);set(&quot;y&quot;,0);set(&quot;y span&quot;,1e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,0.2e-6);set(&quot;material&quot;, &quot;Si (Silicon) - Palik&quot;);## solveraddfde;set(&quot;solver type&quot;, &quot;2D X normal&quot;);set(&quot;x&quot;,0);set(&quot;y&quot;,0);set(&quot;y span&quot;,2e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,1e-6);set(&quot;number of trial\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-03-14T09:20:55+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-03-14T09:25:30+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I&#039;m running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(&quot;x&quot;,0);set(&quot;x span&quot;,1e-6);set(&quot;y&quot;,0);set(&quot;y span&quot;,1e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,0.2e-6);set(&quot;material&quot;, &quot;Si (Silicon) - Palik&quot;);## solveraddfde;set(&quot;solver type&quot;, &quot;2D X normal&quot;);set(&quot;x&quot;,0);set(&quot;y&quot;,0);set(&quot;y span&quot;,2e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,1e-6);set(&quot;number of trial\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/#listItem\",\"name\":\"Reply To: Arbitrary sign for eigen mode\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/#listItem\",\"position\":2,\"name\":\"Reply To: Arbitrary sign for eigen mode\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/\",\"name\":\"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum\",\"description\":\"I'm running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(\\\"x\\\",0);set(\\\"x span\\\",1e-6);set(\\\"y\\\",0);set(\\\"y span\\\",1e-6);set(\\\"z\\\",0);set(\\\"z span\\\",0.2e-6);set(\\\"material\\\", \\\"Si (Silicon) - Palik\\\");## solveraddfde;set(\\\"solver type\\\", \\\"2D X normal\\\");set(\\\"x\\\",0);set(\\\"y\\\",0);set(\\\"y span\\\",2e-6);set(\\\"z\\\",0);set(\\\"z span\\\",1e-6);set(\\\"number of trial\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/357041\\\/#breadcrumblist\"},\"datePublished\":\"2024-03-14T09:20:55+00:00\",\"dateModified\":\"2024-03-14T09:25:30+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum","description":"I'm running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(\"x\",0);set(\"x span\",1e-6);set(\"y\",0);set(\"y span\",1e-6);set(\"z\",0);set(\"z span\",0.2e-6);set(\"material\", \"Si (Silicon) - Palik\");## solveraddfde;set(\"solver type\", \"2D X normal\");set(\"x\",0);set(\"y\",0);set(\"y span\",2e-6);set(\"z\",0);set(\"z span\",1e-6);set(\"number of trial","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/#listItem","name":"Reply To: Arbitrary sign for eigen mode"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/#listItem","position":2,"name":"Reply To: Arbitrary sign for eigen mode","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/","name":"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum","description":"I'm running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(\"x\",0);set(\"x span\",1e-6);set(\"y\",0);set(\"y span\",1e-6);set(\"z\",0);set(\"z span\",0.2e-6);set(\"material\", \"Si (Silicon) - Palik\");## solveraddfde;set(\"solver type\", \"2D X normal\");set(\"x\",0);set(\"y\",0);set(\"y span\",2e-6);set(\"z\",0);set(\"z span\",1e-6);set(\"number of trial","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/#breadcrumblist"},"datePublished":"2024-03-14T09:20:55+00:00","dateModified":"2024-03-14T09:25:30+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum","og:description":"I'm running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(&quot;x&quot;,0);set(&quot;x span&quot;,1e-6);set(&quot;y&quot;,0);set(&quot;y span&quot;,1e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,0.2e-6);set(&quot;material&quot;, &quot;Si (Silicon) - Palik&quot;);## solveraddfde;set(&quot;solver type&quot;, &quot;2D X normal&quot;);set(&quot;x&quot;,0);set(&quot;y&quot;,0);set(&quot;y span&quot;,2e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,1e-6);set(&quot;number of trial","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png","article:published_time":"2024-03-14T09:20:55+00:00","article:modified_time":"2024-03-14T09:25:30+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Arbitrary sign for eigen mode | Ansys Learning Forum","twitter:description":"I'm running on a Windows 11 Pro 23H2.You can get somthing more reproducible by moving the rectangle (or the solver region) along the wide axis.Here I moved the solver region so the coordinates of the mode won\u2019t change. clc;cleardcard;closeall;newproject;## designaddrect;set(&quot;x&quot;,0);set(&quot;x span&quot;,1e-6);set(&quot;y&quot;,0);set(&quot;y span&quot;,1e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,0.2e-6);set(&quot;material&quot;, &quot;Si (Silicon) - Palik&quot;);## solveraddfde;set(&quot;solver type&quot;, &quot;2D X normal&quot;);set(&quot;x&quot;,0);set(&quot;y&quot;,0);set(&quot;y span&quot;,2e-6);set(&quot;z&quot;,0);set(&quot;z span&quot;,1e-6);set(&quot;number of trial","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/14-03-2024-1710407638-mceclip0.png"},"aioseo_meta_data":{"post_id":"357041","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:54:16","updated":"2026-08-23 22:38:19","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tReply To: Arbitrary sign for eigen mode\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Reply To: Arbitrary sign for eigen mode","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357041\/"}],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/357041","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/357041\/revisions"}],"predecessor-version":[{"id":357042,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/357041\/revisions\/357042"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=357041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}