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Recent content by josefl9

  1. josefl9

    Objective-based driver

    Hello, I want to test a vehicle on a specific road profile by requsting an objective (e.g. minimize travel time). Does the Adams SmartDriver support this feature and, if not, are there any alternatives? Thanks in advance, Josef
  2. josefl9

    Parrallel tasks from createjob

    Hello, When using createjob/createtask, do the outputs of the job come in the order they were requested, or in the order the tasks finished? e.g.: Supposing I submit 8 tasks for a job, expecting a scalar output, denoted as fOUT from each. What a I want to receive from the job is an 1by8...
  3. josefl9

    adams_car_flexbody

    Hello, Other than that, is the process as simple as just importing the mnf file? Are there no extra steps necessary? Regards, Josef K.
  4. josefl9

    adams_car_flexbody

    Hello, I am building a cart in Adams Car and I wanted to ask if there are any specific steps in importing a flexible body. So far I have modelled my subsysetms and added a part for the chassis which I am later going to make flexible by importing an MNF file. Are there any specific steps that I...
  5. josefl9

    Custom contact force models

    Hello, I need to define a custom contact force model in Adams/View but I cannot find the order of actions I need to perform. As I understand it so far, I need to select: "User Defined" "User function" -> Define the values that need to be exported/imported from and to Adams "Routine" ->...
  6. josefl9

    User defined functions and subroutines

    Hello, I wanted to try using a UD subroutine/function to define the contact forces in Adams, but so far I haven't been able to find any straightforward documentation. Is it possible do define function that outputs Adams values such as displacements and receive forces? If so, are there any code...
  7. josefl9

    Large nastran jobs

    Thanks a lot! You have been most helpful. Kindest regards, Josef K.
  8. josefl9

    Large nastran jobs

    Hello, I am using an MSC Nastran 2020 version. I don't really get what you mean by solution sequence, but what I am doing is creating flex bodies (mnf) for MSC Adams. It's basically an eigenmode solution (SOL 103) with some extra options. I don't really need any reruns or anything, I just need...
  9. josefl9

    Flexbody markers

    Hello, When placing markers on flexible bodies, if coordinates are specified instead of a node ID, will the marker be properly attatched to the flex body, so that requests can be estimated properly. e.g. If I wanted to measre the acceleration at a point of a flex body with respect to the...
  10. josefl9

    Large nastran jobs

    Hello, I am trying to run a large nastran job (16272552 DOFs). My computer has 32 Gb RAM and 900 Gb of free HDD space. When excecuting, the scratch file created is quite large (143 Gb) and for some reason, the solution just freezes without warnings. I have found documentation about keywords of...
  11. josefl9

    Adams/Car custom geometry import

    Hi, I wanted to ask whether or not there is a point in importing custom geometry in Adams/Car. I understand that the graphics are altered in such manner, but does it change the calculation at all? So far, the only way I 've managed to import geometry was by attatcing it to an already existing...
  12. josefl9

    Time Synchronus Average - tsa - MATLAB

    Hello, I am trying to understand how the tsa function works in matlab in order to use it for gear drivetrain signal analysis. I get that for: y = tsa(x,fs,tp) - x is my dataset - fs is the sampling frequency What I dont understand is how to calculate tp. So far, they way I used the...
  13. josefl9

    ADAMS Request output steps

    I found a solution which didn't require decreasing the time step, one that fits my problem right now anyways. I compared the ADAMS FFT plot results with the ones I compute using matlab and calculated a correction factor. This actually got the results pretty close and is quite consistent as a...
  14. josefl9

    ADAMS Request output steps

    Hello, Yes I did try using the FIXIT formulation for the integrator, even using a larger HRATIO so that the integration runs smoother, but still, when the request file is ouput the time values vary a lot. The only other solution that comes to mind is to use an output step even smaller than the...
  15. josefl9

    ADAMS Request output steps

    Hello, I 've tried a lot of different formulations and settings when trying to output a request file from and ADAMS model, but none of them managed to keep a completely steady output step. What I mean is that even thought I request an output about every 9e-5 seconds (10240 Hz sampling...
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