Dear Charlie, Finally I answered myself my question. User has to enter the temperature value in a table. I tried the BF command beforehand. Actually it can be used only for the Val1 field for temperatures wich refers to an input at the element X-axis. It does not work for temperatures applied along Y and Z. I used to use former beam4/44 elements, it worked properly without having to input a table. Thank you for replying. Regards, Elias Benabdellah Design Engineer Tractebel Engineering France. ________________________________ De : xansys-temp-request@xansystest.info <xansys-temp-request@xansystest.info> Envoyé : mercredi 4 septembre 2019 18:00 À : xansys-temp@xansystest.info <xansys-temp@xansystest.info> Objet : Xansys-temp Digest, Vol 49, Issue 1 Send Xansys-temp mailing list submissions to xansys-temp@xansystest.info To subscribe or unsubscribe via the World Wide Web, visit http://xansystest.info/mailman/listinfo/xansys-temp_xansystest.info or, via email, send a message with subject or body 'help' to xansys-temp-request@xansystest.info You can reach the person managing the list at xansys-temp-owner@xansystest.info When replying, please edit your Subject line so it is more specific than "Re: Contents of Xansys-temp digest..." Today's Topics: 1. [xansys] Topology optimization within APDL (Sheridan Cowger McPheeters) 2. Re: [xansys] Topology optimization within APDL (Chuck Ritter) 3. BFE command with beam188 elements (elias.benabdellah@tractebel.engie.com) 4. Re: BFE command with beam188 elements (Wells, Charles (GE Power)) ---------------------------------------------------------------------- Message: 1 Date: Tue, 3 Sep 2019 10:43:08 -0700 From: Sheridan Cowger McPheeters <scm2@email.arizona.edu> To: xansys-temp@xansystest.info Subject: [Xansys] [xansys] Topology optimization within APDL Message-ID: <CAH_NmbQGFL3500uFJXv8SuGMd6knEfE2Fw+E7hkoqm-JHrvDjg@mail.gmail.com> Content-Type: text/plain; charset="UTF-8" Hi all, I'm working on a project that can be boiled down to optimizing the locations of point supports for a plate in order to minimize deflections. The plate geometry is non-trivial, which is why we are using FEA rather than analytical methods. I am curious as to whether any of ANSYS' built in optimization tools can be leveraged through APDL to assist with this. I have previously relied on manual run series to approximate minima; my current routine clears and modifies the geometry, then re-meshes so that boundary conditions are applied on individual nodes at the precise locations desired. My research into optimization via APDL has, so far, only turned up information for optimizing properties (e.g. the cross-sectional properties of a beam) rather than topology (whether that's changing geometry and remeshing or directly moving nodes). If anyone has any experience with topology optimization and can offer advice in terms of command structure and process or can refer me to resources on the subject, I'd really appreciate it. Thank you, in advance, for your time and assistance. Regards, Sheridan McPheeters scm2@email.arizona.edu Aerospace & Mechanical Engineering The University of Arizona ------------------------------ Message: 2 Date: Tue, 3 Sep 2019 15:09:19 -0400 From: "Chuck Ritter" <ritter@jar.com> To: "'XANSYS Mailing List Temporary Home'" <xansys-temp@xansystest.info> Subject: Re: [Xansys] [xansys] Topology optimization within APDL Message-ID: <003d01d5628b$168886c0$43999440$@jar.com> Content-Type: text/plain; charset="us-ascii" It is possible to use APDL design optimization for some topologies. You are already scripting a complete model. Add embedded variables and put the entire script in an optimization loop. Variables would be dimensions/locations. Given that you have a plate structure, you can possibly avoid the XOX Boolean modeler which has been frozen for a long time. It has its foibles. If the plate assembly is very complex, you might zone the allowable locations within boxes or circles and just regenerate those zones with the hard point locations within each driven by limits on the variables. If you don't know how many supports are optimal, you might add some sort of partial factorial DOE, but it would be much better avoiding that if you could. It doesn't sound like you are concerned with stress. If that is so, then you can get a pretty good picture without high mesh refinement. Chuck Ritter JAR Associates North Kingstown RI -----Original Message----- From: Sheridan Cowger McPheeters [mailto:scm2@email.arizona.edu] Sent: Tuesday, September 03, 2019 1:43 PM To: xansys-temp@xansystest.info Subject: [Xansys] [xansys] Topology optimization within APDL Hi all, I'm working on a project that can be boiled down to optimizing the locations of point supports for a plate in order to minimize deflections. The plate geometry is non-trivial, which is why we are using FEA rather than analytical methods. I am curious as to whether any of ANSYS' built in optimization tools can be leveraged through APDL to assist with this. I have previously relied on manual run series to approximate minima; my current routine clears and modifies the geometry, then re-meshes so that boundary conditions are applied on individual nodes at the precise locations desired. My research into optimization via APDL has, so far, only turned up information for optimizing properties (e.g. the cross-sectional properties of a beam) rather than topology (whether that's changing geometry and remeshing or directly moving nodes). If anyone has any experience with topology optimization and can offer advice in terms of command structure and process or can refer me to resources on the subject, I'd really appreciate it. Thank you, in advance, for your time and assistance. Regards, Sheridan McPheeters scm2@email.arizona.edu Aerospace & Mechanical Engineering The University of Arizona _______________________________________________ Xansys-temp mailing list Xansys-temp@xansystest.info http://xansystest.info/mailman/listinfo/xansys-temp_xansystest.info If you are receiving too many emails from XANSYS please consider changing account settings to Digest mode which will send a single email per day. Please send administrative requests such as deletion from XANSYS to xansys-mod@tynecomp.co.uk and not to the list ------------------------------ Message: 3 Date: Wed, 4 Sep 2019 09:36:54 +0000 From: <elias.benabdellah@tractebel.engie.com> To: <xansys-temp@xansystest.info> Subject: [Xansys] BFE command with beam188 elements Message-ID: <AM6PR05MB6021E6650E70C22FEB3DEEE0BBB80@AM6PR05MB6021.eurprd05.prod.outlook.com> Content-Type: text/plain; charset="us-ascii" Hello Everyone, I'm testing temperatures loads on beam188 elements on Ansys17.1. I noticed when using BFE command that temperatures gradients along Y (val2) or Z (val3) axis are applied only at node I of each element. I expect to have the temperature on the cross section's surface to be constant and not varying from node I to J. Is that normal ? If yes, how can I define the same value for both ends of each element ? Thank you for help. Regards. E.Benabdellah Design Engineer Tractebel Engieneering France ENGIE Mail Disclaimer: http://www.engie.com/disclaimer/ ------------------------------ Message: 4 Date: Wed, 4 Sep 2019 13:59:57 +0000 From: "Wells, Charles (GE Power)" <Charles.Wells@ge.com> To: XANSYS Mailing List Temporary Home <xansys-temp@xansystest.info> Subject: Re: [Xansys] BFE command with beam188 elements Message-ID: <E8FD04FB8F31A746938E66002650DDF54A4C4BB0@CINMBCNA03.e2k.ad.ge.com> Content-Type: text/plain; charset="us-ascii" Have you tried applying BF values to each I and J node? Charlie Wells Turbine Analysis & Methods Gas Power Systems - Turbine Module GE Power Greenville, SC Office (864) 254-4316 Mobile (561) 254-8330 Fax (864) 254-2393 charles.wells@ge.com -----Original Message----- From: elias.benabdellah@tractebel.engie.com <elias.benabdellah@tractebel.engie.com> Sent: Wednesday, September 4, 2019 5:37 AM To: xansys-temp@xansystest.info Subject: EXT: [Xansys] BFE command with beam188 elements Hello Everyone, I'm testing temperatures loads on beam188 elements on Ansys17.1. I noticed when using BFE command that temperatures gradients along Y (val2) or Z (val3) axis are applied only at node I of each element. I expect to have the temperature on the cross section's surface to be constant and not varying from node I to J. Is that normal ? If yes, how can I define the same value for both ends of each element ? Thank you for help. Regards. 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