{"id":5202,"date":"2017-07-17T11:54:47","date_gmt":"2017-07-17T10:54:47","guid":{"rendered":"http:\/\/www.solidapps.co.uk\/blog\/?p=5202"},"modified":"2017-07-17T11:54:47","modified_gmt":"2017-07-17T10:54:47","slug":"solidworks-support-monthly-news-july-2017","status":"publish","type":"post","link":"https:\/\/www.solidapps.co.uk\/blog\/2017\/07\/solidworks-support-monthly-news-july-2017\/","title":{"rendered":"SOLIDWORKS Support Monthly News \u2013 July 2017"},"content":{"rendered":"<p>Welcome to this new edition of the SOLIDWORKS Support Monthly News, coauthored by members of the SOLIDWORKS Technical Support teams worldwide.<\/p>\n<h1>Hotline Story: How a report of incorrect buckling results in SOLIDWORKS Simulation turned out instead to validate them<\/h1>\n<p><em>By Julien Boissat<\/em><\/p>\n<p>This true story serves as a good reminder that <strong>it\u2019s a natural tendency to be overly confident and unfairly blame the software for giving unexpected results<\/strong>. Recently, I worked on a case where the user reported abnormal <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-D5AB9Y\" target=\"_blank\" rel=\"noopener\">buckling load factor <\/a>(BLF) results when solving a buckling study. The results were considered abnormal because they differed significantly from the results obtained in another simulation software. Which software exactly is of little importance here. What matters is that the user must have had a <strong>considerable trust<\/strong> in that other software to choose to blame SOLIDWORKS Simulation over it. Needless to say, this user had <strong>even more confidence in themselves<\/strong> by being certain they hadn\u2019t made any mistake.<\/p>\n<p>When such a case arises, with suspected incorrect results \u2013 let\u2019s call it a discrepancy \u2013 the explanation can come from one reason or a combination thereof:<\/p>\n<ul>\n<li><strong>Bug<\/strong> in SOLIDWORKS Simulation (as promptly pointed by the user)<\/li>\n<li><strong>Bug<\/strong> in the other software (yes, that happens)<\/li>\n<li><strong>Discrepancy in the geometry or simulation setups <\/strong>in either software (\u201cuser error\u201d we call it, but does that ever happen? <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5265 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture40.png\" alt=\"\" width=\"19\" height=\"19\" \/>)<\/li>\n<li><strong>Discrepancy in the theory or assumptions<\/strong> made by each software<\/li>\n<\/ul>\n<p>Consequently, in general, we like to ask users to explain in detail what the \u201cbad\u201d results consist of exactly, but more importantly what would be considered \u201cgood\u201d results. And to justify why the presumed \u201cgood\u201d results in the other software are relevant and reliable. In other words, <strong>were both software tools asked to answer the exact same question using the exact same set of tools?<\/strong><\/p>\n<p>As in the majority of cases like this one, we are not given full access to the setup and results in the other software. And we have to fall back to comparing SOLIDWORKS Simulation with theory. Easy enough if the geometry is simple, not so much otherwise. I got lucky there. The geometry was a simple straight rectangular tube, with dimensions as shown below, and a Force value of 1N:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17228 aligncenter colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Buckling-Load-Factor-setup.png\" sizes=\"auto, (max-width: 890px) 100vw, 890px\" alt=\"\" width=\"890\" height=\"185\" \/><\/p>\n<p>As the formula for Euler\u2019s critical load is quite standard and available from many sources, I elected to use the formula from <a href=\"https:\/\/en.wikipedia.org\/wiki\/Euler's_critical_load\" target=\"_blank\" rel=\"noopener\">Wikipedia<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17229 aligncenter colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Buckling-Load-Factor-Wikipedia-formula.png\" sizes=\"auto, (max-width: 917px) 100vw, 917px\" alt=\"\" width=\"917\" height=\"343\" \/><\/p>\n<p>In the above formula, <em><strong>E<\/strong> <\/em>is 2.1E11 N\/m^2 (obtained from the Material dialog box.<\/p>\n<p><em><strong><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17230 alignright colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Buckling-Load-Factor-Area-moment-of-inertia.png\" sizes=\"auto, (max-width: 406px) 100vw, 406px\" alt=\"\" width=\"406\" height=\"58\" \/>I<\/strong><\/em> is easy to obtain from the the Section Properties of SOLIDWORKS, but you have to make sure to use the lowest of the three moments of inertia of the area, at the centroid, among Lxx, Lyy and Lzz. The lowest value allows you to consider the critical load of the first buckling mode, while the value immediately higher usually allows you to calculate the critical load of the second buckling mode. In the present case, the value is Lxx = 80592 mm^4.<\/p>\n<p>The length <strong><em>L<\/em> <\/strong>is 1 m and the column effective length factor <em><strong>K<\/strong> <\/em>is 2, based on the applied fixture.<\/p>\n<p>So the formula gives <strong><em>Pcr<\/em> <\/strong>= 39771 N.<\/p>\n<p>In SOLIDWORKS Simulation, using a solid mesh gives this result:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17231 aligncenter colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Buckling-Load-Factor-Simulation-results-solid-mesh.png\" sizes=\"auto, (max-width: 549px) 100vw, 549px\" alt=\"\" width=\"549\" height=\"176\" \/><\/p>\n<p>Using shell and beam mesh give very similar results, summarized below:<\/p>\n<table width=\"484\">\n<tbody>\n<tr>\n<td width=\"90\"><\/td>\n<td width=\"221\"><strong>Pcr from Simulation results (N)\u00a0<\/strong><\/td>\n<td width=\"173\"><strong>Discrepancy with theory<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Solid mesh<\/strong><\/td>\n<td>39657<\/td>\n<td>0.29%<\/td>\n<\/tr>\n<tr>\n<td><strong>Beam mesh<\/strong><\/td>\n<td>39609<\/td>\n<td>0.41%<\/td>\n<\/tr>\n<tr>\n<td><strong>Shell mesh<\/strong><\/td>\n<td>39659<\/td>\n<td>0.28%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>As you can see <strong>SOLIDWORKS Simulation results are spot-on<\/strong>. This validates, by the way, the buckling load factor calculated by SOLIDWORKS Simulation for all three available element types.<\/p>\n<p>This therefore rules out the possible explanation by a bug in SOLIDWORKS Simulation. That leaves us with a bug in the other software, a discrepancy in the theory or assumptions made by each software (both unlikely for something this simple), or a user error.<\/p>\n<p>As the user was convinced by the demonstration I gave, the user was reassured and the case was closed. We may never know the exact cause of the different results between both software, but we learned a valuable lesson nonetheless.<\/p>\n<p>Note: you can find in Solution Id:\u00a0<a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-6GPWIVZ\" target=\"_blank\" rel=\"noopener\">S-073170<\/a> the SOLIDWORKS model with the setup of all three studies, and a spreadsheet with the theoretical results.<\/p>\n<h1>SOLIDWORKS 2018 Beta is Here\u2026What Are You Waiting For?<\/h1>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17432 aligncenter colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/BetaHome_962x231.jpg\" sizes=\"auto, (max-width: 962px) 100vw, 962px\" alt=\"\" width=\"962\" height=\"231\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-12780 alignright colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/SOLIDWORKS-Beta-216-image2-295x300.jpeg\" sizes=\"auto, (max-width: 156px) 100vw, 156px\" alt=\"\" width=\"156\" height=\"158\" \/><\/p>\n<p>The <strong>SOLIDWORKS 2018 Beta Program<\/strong> has already started. Are you hesitating to participate? Don\u2019t. Here\u2019s everything you can do when you <a href=\"https:\/\/www.solidworks.com\/beta\/\" target=\"_blank\" rel=\"noopener\">become a tester<\/a>:<\/p>\n<ul>\n<li><a href=\"http:\/\/www.solidworks.com\/beta\/beta-downloads.htm\">Test-drive<\/a> new &amp; enhanced products<\/li>\n<li><a href=\"http:\/\/www.solidworks.com\/beta\/beta-forum.htm\">Connect<\/a> with the community<\/li>\n<li><a href=\"http:\/\/www.solidworks.com\/beta\/beta-forum.htm\">Interact<\/a> with the R&amp;D and management teams<\/li>\n<li><a href=\"http:\/\/www.solidworks.com\/beta\/beta-contests.htm\">Show off your skills<\/a> \u2013 over 100 prizes<\/li>\n<\/ul>\n<p>For more information on the Beta Program, please visit the <a href=\"http:\/\/www.solidworks.com\/beta\">Beta website.<\/a> If you have any specific questions, don\u2019t hesitate to email us at <a>beta@solidworks.com<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<h1>Simulation Step-Up Series<\/h1>\n<p><a href=\"http:\/\/blogs.solidworks.com\/tech\/2017\/06\/solidworks-support-monthly-news-june-2017.html\" target=\"_blank\" rel=\"noopener noreferrer\">Last month<\/a>, Reza discussed the topic of <strong><span id=\"eow-title\" class=\"watch-title\" dir=\"ltr\" title=\"SOLIDWORKS Simulation Step-Up Series: Contact Modeling Part 1\">Accuracy and Convergence<\/span><\/strong>. This month, Ramesh discusses the topic of <span id=\"eow-title\" class=\"watch-title\" dir=\"ltr\" title=\"SOLIDWORKS Simulation Step-Up Series: Contact Modeling Part 1\"><strong>Viewing results (Parts 1 &amp; 2)<\/strong><\/span>.<br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/R0M7kRb4TWE?rel=0\" width=\"853\" height=\"480\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/Gu92rFDqAbU?rel=0\" width=\"853\" height=\"480\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><br \/>\nNext month, Brian will discuss the topic of <strong><span id=\"eow-title\" class=\"watch-title\" dir=\"ltr\" title=\"SOLIDWORKS Simulation Step-Up Series: Correlating Simulation to Physical Tests\">Correlating Simulation to Physical Tests.<\/span><\/strong><\/p>\n<p><span id=\"eow-title\" class=\"watch-title\" dir=\"ltr\" title=\"SOLIDWORKS Simulation Step-Up Series: Contact Modeling Part 1\">.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h1>Noteworthy Solutions from the SOLIDWORKS Knowledge Base<\/h1>\n<p><b><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-408 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture3.png\" alt=\"icon - SW\" width=\"16\" height=\"16\" \/> General Hotfix for SOLIDWORKS\u00ae 2017 SP3 (SPR#1024009)<br \/>\n<\/b>A hotfix is available for SOLIDWORKS\u00ae 2017 SP3 that addresses a problem where the dimension decimal separator is applied to material custom properties.<br \/>\nThe hotfix is included in the attachment of Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-6G6UABH\" target=\"_blank\" rel=\"noopener noreferrer\">S-073155<\/a>.<\/p>\n<p><b><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-408 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture3.png\" alt=\"icon - SW\" width=\"16\" height=\"16\" \/> When installing the SOLIDWORKS\u00ae Student Edition software, how do I troubleshoot \u2018Error 1334\u2019?<br \/>\n<\/b>See the procedure in Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-6815I1S\" target=\"_blank\" rel=\"noopener noreferrer\">S-072915<\/a>.<\/p>\n<p><b><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-405 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture1.png\" alt=\"Icon - EPDM\" width=\"16\" height=\"16\" \/> Using SOLIDWORKS\u00ae PDM 2017, what are the recommended steps to set up and configure Microsoft\u00ae SQL Server Enterprise edition for database replication?<br \/>\n<\/b>To use the database replication functionality of SOLIDWORKS\u00ae PDM 2017, you must first purchase and license Microsoft\u00ae SQL Server\u00ae Enterprise edition for each of the servers that will replicate the vault database. The SQL Server Standard software does not include this functionality. SQL licenses that are sold together with SOLIDWORKS PDM seats also do not include this functionality.<br \/>\nFor more detailed information, see Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-69ZBU5O\" target=\"_blank\" rel=\"noopener noreferrer\">S-072960<\/a>.<\/p>\n<p><b><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-405 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture1.png\" alt=\"Icon - EPDM\" width=\"16\" height=\"16\" \/> In the SOLIDWORKS\u00ae PDM software, is there a way to determine if a specific notification was delivered to the desired user or group?<br \/>\n<\/b>There is not always evidence that a specific notification message was delivered to the desired user or group. However, it is possible to track the message in some cases.<br \/>\nFor more detailed information, see Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-697AOHM\" target=\"_blank\" rel=\"noopener noreferrer\">S-072946<\/a>.<br \/>\n<strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-410 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture4.png\" alt=\"\" width=\"16\" height=\"16\" \/><\/strong> <strong>How do I restart and check the HYDRA service on a worker agent or coordinator for Offloaded Simulation?<\/strong><br \/>\nIf the list of computers in the SOLIDWORKS Simulation Network Manager window is completely blank, you might need to restart and check the HYDRA service on the worker agent and coordinator computers. See the procedure in Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-69KSK5Z\" target=\"_blank\" rel=\"noopener noreferrer\">S-072953<\/a>.<\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-410 colorbox-17226\" src=\"http:\/\/blogs.solidworks.com\/tech\/wp-content\/uploads\/sites\/4\/Screen-capture4.png\" alt=\"\" width=\"16\" height=\"16\" \/> Can the worker system used with SOLIDWORKS\u00ae Simulation Offloaded functionality use multiple CPU cores?<\/strong><br \/>\nYes. The worker system used with SOLIDWORKS\u00ae Simulation Offloaded functionality can use multiple CPU cores. For more details, see Solution Id: <a href=\"https:\/\/customerportal.solidworks.com\/eservice_enu\/start.swe?SWECmd=GotoView&amp;SWEView=SW+KBase+Solution+View+(eService)&amp;SWERF=1&amp;SWEBU=1&amp;SWEApplet0=SW+KBase+Solution+Form+Applet+(eService)&amp;SWERowId0=1-6DDX6D7\" target=\"_blank\" rel=\"noopener noreferrer\">S-073100<\/a>.<\/p>\n<hr \/>\n<p>That\u2019s it for this month. Thanks for reading this edition of SOLIDWORKS Support News.<\/p>\n<p>Originally posted in the <a href=\"http:\/\/blogs.solidworks.com\/tech\/2017\/07\/solidworks-support-monthly-news-july-2017.html\" target=\"_blank\" rel=\"noopener\">SOLIDWORKS Tech Blog<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Welcome to this new edition of the SOLIDWORKS Support Monthly News, coauthored by members of the SOLIDWORKS Technical Support teams worldwide. Hotline Story: How a report of incorrect buckling results&hellip; <\/p>\n","protected":false},"author":1,"featured_media":5203,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[25],"class_list":["post-5202","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solidworks","tag-solidworks-2"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/posts\/5202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=5202"}],"version-history":[{"count":2,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/posts\/5202\/revisions"}],"predecessor-version":[{"id":5205,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/posts\/5202\/revisions\/5205"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/media\/5203"}],"wp:attachment":[{"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=5202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=5202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solidapps.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=5202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}