I am trying to get eigen modeshapes of a 4-story 120 DOF building model in abaqus and haven't been able to get it. Either getting the eigen modeshapes directly or getting the stiffness and mass matrix would be fine. I have been facing the following problems: First, I am not able to get .fil file in outputs. I am submitting the job as: abaqus job=170_Dam0_1250_Matrices_old My .inp file contains the following command as I have followed from other posts in this forum: ** STEP: Frequency ** *Step, name=Frequency, nlgeom=NO, perturbation *Frequency, eigensolver=Lanczos, sim, acoustic coupling=on, normalization=mass , , 5000., , , ** ** OUTPUT REQUESTS ** *Restart, write, frequency=0 ** ** FIELD OUTPUT: F-Output-2 ** *Output, field *Node Output U, ** ** HISTORY OUTPUT: H-Output-2 ** *Output, history *Energy Output ALLKE, ALLSE *FILE FORMAT, ASCII *NODE FILE U *ENDSTEP What is wrong here? My second problem is, I have been able to get global stiffness and mass matrices in the form of .mtx file. However, I haven't been able to post process it to get the symmetric K and M matrices. How do I get that form? The .mtx file is of the following form: -64,6, -64,6, 0.0 -63,1, -63,1, 0.0 -63,2, -63,2, 0.0 -63,3, -63,3, 0.0 -63,6, -63,6, 0.0 -62,6, -62,6, 0.0 -61,1, -61,1, 0.0 ..... My model has 36 unconstrained nodes with 6 DOFs and my ultimate goal is to get 216 length mode shape vector. Could you please help me with this?

Hello, thank you for sharing this tool. Recently, I am learning Phase-Field. How can I easily modify the .inp file of ABAQUS CEA output to apply to UEL. UEL needs to build the virtual element, which will not be very convenient when the model is large. Could you give me some advice?

Hello, I ran an explicit abaqus analysis generated from an input file including a user subroutine that prints node displacements at a certain simulation time into the odb file. Anybody experienced with reading those node displacements with Abaqus2Matlab? Thanks for any help :) Manuel Edit: If I try "Obtain Analysis Data" the following error message appears: Warning: File not found or permission denied > In giveformat2OdbFunction (line 46) In A2MV3/ObtainAnalysisDataMenuSelected (line 653) In appdesigner.internal.service/AppManagementService/executeCallback (line 138) In matlab.apps.AppBase>@(source,event)executeCallback(appdesigner.internal.service.AppManagementService.instance(),app,callback,requiresEventData,event) (line 63) In matlab.ui.internal.controller/WebMenuController/fireActionEvent (line 67) In matlab.ui.internal.controller/WebMenuController/handleEvent (line 55) In matlab.ui.internal.controller.WebMenuController>@(varargin)obj.handleEvent(varargin{:}) (line 36) In viewmodel.internal.factory.ManagerFactoryProducer>@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event)) (line 105) Error using cell2struct Number of field names must match number of fields in new structure. Error in giveformat2OdbFunction (line 69) DATA_Analysis=cell2struct(DATA_Analisys,Modified_Steps_names,length(Modified_Steps_names)); Error in A2MV3/ObtainAnalysisDataMenuSelected (line 653) [DataAnalysis]= giveformat2OdbFunction('readAnalysisData',Full_Analysis_Data_Info); Error in appdesigner.internal.service.AppManagementService/executeCallback (line 138) callback(appOrUserComponent, event); Error in matlab.apps.AppBase>@(source,event)executeCallback(appdesigner.internal.service.AppManagementService.instance(),app,callback,requiresEventData,event) (line 63) newCallback = @(source, event)executeCallback(appdesigner.internal.service.AppManagementService.instance(), ... Error using matlab.ui.internal.controller.WebMenuController/fireActionEvent Error while evaluating Menu Callback.