Yukai

Hello! How should I solve this check error so that Local Optimization in DAKOTA can be executed smoothly? check failure [multiple objectives for single objective optimization. Note: you can introduce a weighted normalized sum of the objectives.] I first used sampling in Dakota as basic optimization. I produced a total of 10 results in sampling. I wanted to perform Local Optimization on several of the results, but a check failure message occurred. How should I solve it? Thanks for your help!!! Best Regards YuKai

HI Heinrich, Thank you for your reply, I will try it. Best Regards YuKai

Hello!! How should I set constraints so that CFD will not run when the slpoe parameter is greater than 45? Let CFD only performs the parameters I want Thanks for yours help !! Best Regards YuKai

HI Heinrich Thank you so much I understand Best Regards YuKai

HI Heinrich After I tried it, I found that if I used the first method you mentioned, he would run out of sobol_02 and start running again. The second method will also run out of sobol_02 and start over. Is this correct? Best Regards YuKai

HI Heinrich Thank you so much I will try to see it right away Best Regards YuKai

Hello!! If the error occurs when the optimization and CFD are performed, the CAESES is closed, will it continue to execute the place where you can re -interrupt? For example, I use SOBOL to deform 20 projects and perform CFD computing, but the storage space is full when it runs to half, so that he cannot continue the operation. So, can I continue the operation from the interrupted place next time? Thanks for your help!!! Best Regards YuKai

HI Andreas, Sorry for replying to you so late After I deleted it, I still can't log in to the latest version of CAESES.

Hi Andreas, I really appreciate your reply to me After comparing the two situations, I only found that some values when calculating interfoam were different, and the settings of snappyHexmesh I used for mesh generation were all the same!! I'll keep trying to figure out where the problem is when generating the mesh!! P.S. I wanted to install the new version 5.2.4 to try it out, but after the installation was completed, I found that it could not be opened. This was his error. If you have crashes using a custom file dialog (PDF generation or OpenProject) add "-style plastique" to your start script qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs (from /home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), linuxfb (from /home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin /Linux.x86_64/platforms/), minimal (from /home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), minimalegl (from /home/yukai/Desktop/CAESES_5.2.4_Linux .x86_64/bin/Linux.x86_64/platforms/), offscreen (from /home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), vnc (from /home/yukai/Desktop/ CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), webgl (from /home/yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), xcb (from /home/ yukai/Desktop/CAESES_5.2.4_Linux.x86_64/bin/Linux.x86_64/platforms/), eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, webgl, xcb. ./CAESES: line 115: 20882 Aborted (core dumped) ${FS_INSTALL_DIR}/bin/Linux.x86_64/CAESES $ARGS "$@" I don't know how to solve it. I tried reinstalling and using -style plastique as mentioned above, but I couldn't successfully open it. Thanks for your help!!! Best Regards YuKai

HI Andreas I really appreciate your reply to me Is this after I execute stdouterroroutput.redirect once and it seems to be normal? However, openfoam still calculated the divergence, so the calculation was terminated! I set the endtime to 10000, but the current calculation diverges when it reaches 155. I am using version 5.1.7, which is not the latest version. Could this be relevant? stdouterroroutput.redirect

HI! I have a question After I completed the openfoam connection in CAESES, he needed to run it for the first time so that he could have reference values for optimization. However, during the first execution, he was unable to converge and openfoam terminated the calculation. I know this seems to be a problem with openfoam, but when I exported the model and ran it alone through openfoam, it was successfully executed and converged, and all my settings in openfoam were the same. I don't understand why the openfoam operation in caeses cannot converge, but openfoam alone can converge normally? Thanks for your help!!! Best Regards YuKai

Hi Andreas Arapakopoulos Thank you very much for replying to me I know how I do it p.s. If I have any other questions in the future, can I ask you?

Hi Andreas Arapakopoulos Thank you very much for replying to me I currently use python to calculate the force in the X-axis direction in the forces.dat file, and output a calculated dat file. I also write it to Allrun for execution. Can this calculated dat file be regarded as the best Is it a numerical value? Or would it be better for me to directly use the last value in the forces.dat file as the optimized value as you said?

Hello I have some questions !! I have completed the openfoam connection and executed it successfully, but I would like to ask how I want to set the optimization parameter file. In the example, there is a pin.dat file that can be set as a parameter, and after my current openfoam value calculation is completed, it will Generate force .dat file, how do I set it to the optimization parameters? I am currently writing a python program that allows it to calculate the force.dat file into a total resistance parameter and write it into a blank dat file so that this parameter can be used as an optimized setting, but I am not sure about my approach. Can the effect be achieved? In addition, I would like to ask how the force.dat file cannot be written by caeses after the openfoam execution is completed, and the path generated by it is a bit wrong. How do I need to change it? As shown in the red circle in the picture The correct path should be /home/ncku514/Desktop/kcsopenfoam1030/1107KCSRHINO/manual_results/baseline/openfoam/postProcessing/force1/0/force.dat But he is missing /postProcessing/force1/0/ Thanks for your help!!! Best Regards YuKai

Hello Heinrich, Thank you very much for your guidance, I tried it and it worked successfully!! I would like to ask you again how do I know that the output stl is deforming during cfd operation? Are there any settings I need to make? Thanks for your help!!! Best Regards

Hello! If I check convert to Template when importing the input file, I find that my path will become wrong. How can I change the path so that the file copied by caeses can run? I have added these instructions to Allrun wmUNSET source /opt/openfoam6/etc/bashrc touch case.foam I am using the openfoam version of linux ubuntu I will compare the file I imported with the sample file and it should make my question clearer! Pictures Q1 and Q2 are comparison pictures of file paths when importing files. The example Q1 picture has system/snappyHexMeshDict, while the Q2 picture is what it looks like after I import it. Only snappyHexMeshDict does not generate a path. Pictures Q3 and Q4 are files copied by CAESES. In the example Q3, folders such as system and 0 are copied, while picture Q4 is what I tried and did not copy the folders system and 0. When I tried, I always checked the option to convert to Template. How can I solve this problem? Thanks for your help!!! Best Regards stdouterroroutput.redirect

Hello! I have a problem connecting to Openfoam! I imported all the system, constant, 0 and other files in the original CASE folder into CAESES, and then imported Allrun as well. I would like to ask if the Allrun path needs to be set to the original CASE folder? Because after CAESES starts executing, it will copy the imported data and create a new folder, which also contains Allrun. I want to know where my path should be set? There is also the model export part. Do I need to export the model STL file in CAESES first and put it in the original constant folder and then execute openfoam through the CAESES interface? The problem I encountered is that if there is no STL file in the original folder, simulation cannot be performed. I want to know how I can let openfoam read my model on CAESES. I have modified the STL reading path in the opemfoam-related files. For example: change the stl file read in surfaceFeaturesDict to <entry>Exports|hull</entry>.stl Thanks for your help!! Best Regards

Hello! If I want the chamfer of the model to automatically deform at 0~45 degrees, how should I set it? The current model is an STL file, and I use MeshMorph and freeformdeformation to set it. I created a Rectangular Box to set the deformation range, but I don't know how to set the reference point of the deformation. The red line in the appendix is the oblique angle. Thanks for your help!!! Best Regards YuKai

Hello Mr.Claus!! Thanks for you help!!! I'll keep trying to fix the gap!!! Best Regards YuKai

Hello!! May I ask if there is no gap in the part that needs to be parameterized and automatically deformed (the red part), but there are gaps in other places, will it affect the entire parameterization process, automatic deformation and the subsequent CFD process?

Hello Mr.Claus!! Thanks for you help!!! I'll try to find it too, thank you very much! Please Mr. Claus teach me how to use the sew function, thank you so much! I want to know about the SEW function, where and how it is used!!

Hello Mr.Claus!! Thanks for you help!!! I've looked at the add source action, but can't seem to find the SEW function. The following is my project, please Mr. Claus teach me how to modify, thank you so much! Best Regards YuKai KCS_model.cdb

Hello Mr.Claus!! Thanks for you help!!! I've looked at the add source action, but can't seem to find the SEW function. The following is my project, please Mr. Claus teach me how to modify, thank you so much! Best Regards YuKai KCS_model.cdb

Hello!! I follow the tutorial video to build the ship deck, but I can't generate it, what should I do? In addition, I would like to ask how to mirror the other half of the hull to ensure that the hull is sealed? Thanks for you help!!

Hello! I really want to learn how to use CAESES to complete some hull shape optimization, but there are still many things I don't understand. If there is already an STL model file, can it be directly parameterized? Or what process must be passed to complete the parameterization process? (I want to use KCS ship model for hull parameterization and partial hull optimization) In addition, I want to ask to see if there is a red line on the model after I first imported it, which means that the hull is damaged? (Do I need to import Rhino to repair it and then return to CAESES?) Thanks for your help!!!