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  1. andreamordini

    modeling a damper with COMBIN37

    Hi all, I model a damper for a time history analysis with the law F=C v^0.015 with the COMBIN37 element. Therefore, I insert in the real constants C1=C and C2=-0.985. the analysis doesn't converge. If I use C2>=0 the analysis works. Any idea or previous experience on the topic? andrea...
  2. andreamordini

    Scaling the ETABLEs

    Hi everybody, I would like to scale the results saved in the ETABLEs by using a factor in order to obtain the results in different units. I tried to use the command SMULT as follows SMULT, var, var, , factor The problem is that the scaled values of var are saved for all the SET in the analysis...
  3. andreamordini

    Imposing acceleration time histories

    As long as I know, it is not possible to an acceleration time histories to a nodes in a transient analysis in ANSYS. Tipycal example a multi support analysis af a bridge where each pier has a different excitation. The same procedure is possible in ABAQUS. My questions: 1- How the procedure is...
  4. andreamordini

    modifying the model between two analyses

    I need to modify one element between two static steps. Since EMODIF can be used only with a PREP7 I have to solve the first step, enter prep and modify the element, reenter again SOLU. In this way the results of the first solu are cancelled. 1- How can I impose the time running from 0 to 1 for...
  5. andreamordini

    ansys and femap

    Hi all, totally disappointed from the ansys GUI, I was thinking to have a look to femap to be used as a pre and post for ansys. Anyone has some experience? What is possible to control directly by femap and what has to be controlled by ansys? Impressions? andrea...
  6. andreamordini

    femap and ansys

    Hi all, totally disappointed from the ansys GUI, I was thinking to have a look to femap to be used as a pre and post for ansys. Anyone has some experience? What is possible to control directly by femap and what has to be controlled by ansys? Impressions? andrea...
  7. andreamordini

    merging result files

    hi all, I have two subsequent analysis (static, end at time T1 and dynamic, end at time T2) on the same model. Is it possible to merge the relative result file to obtain and visualize a single output? Thanks, andrea ------------------------------------------- Andrea Mordini, Civil Engineer...
  8. andreamordini

    moving mass

    Hi all, what is in your opoinion the best way to model a mass moving on a line meshed with beam elements? thanks in advance, andrea ------------------------------------------- Andrea Mordini, Civil Engineer, Ph.D. http://www.andreamordini.com...
  9. andreamordini

    /opt module

    I started using this module but I found out that the maximum number of parameters (design variables) is 60. It is a very small number to perform Finite Element Model Updating. Can anyone explain why ? (from the theoretical point of view) Is it possible to use more parameters using some numerical...
  10. andreamordini

    defining a beam section

    I am using a BEAM188 element with the section defined via SECTYPE. I would like to rotate 90 deg the section about the local x axis of the beam. How can I do it without redefing a new CS? andrea ------------------------------------------- Andrea Mordini, Civil Engineer, Ph.D...
  11. andreamordini

    Loop over component members

    Hallo everybody, Is it possible to perform a loop over the nodes or the elements of a selected component? Thanks, andrea ------------------------------------------- Andrea Mordini, Civil Engineer, Ph.D. http://www.andreamordini.com...
  12. andreamordini

    Displacements out of node location

    Hallo all, I have a model of beam elements and I need to extract from the solution the displacements in some particular positions which do not coincide with the FE nodes. How can I do this? Andrea ------------------------------------------- Andrea Mordini, Civil Engineer, Ph.D...
  13. andreamordini

    *USE in *ABBR command

    When I call a macro from a macro library by using the *ABBR command with: *ABBR, command, *USE, macroname at startup I obtain: * no longer valid as comment character - please use ! and the abbreviation is cancelled. Do you know what the problem could be? andrea...
  14. andreamordini

    surface load visualization

    Dear all, in the step 1 of an analysis I apply just the gravity load on a structure. Then, in the step 2 I apply a distributed load on beams with the SFBEAM command. The value is, let's say, 10. In the step 3, I bring this value with SFCUM and SFBEAM to 20. In the postprocessing with /PSF, I can...
  15. andreamordini

    imposed motion

    Is it possible in SAP2000 to impose a displacement or acceleration time history to some selected nodes? How I can do it? thanks Andrea ------------------------------------------- Andrea Mordini, Civil Engineer, Ph.D. http://www.andreamordini.com...
  16. andreamordini

    ABAQUS on dual core

    I am running ABAQUS on a dual processor AMD computer. I have already set in the env file the setting suggested by the manual and also in the CAE job tabs. But when I run the analysis only oen core is running. What do I have to do to use both cores? andrea mordini...

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