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ppraf last won the day on July 12

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About ppraf

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  1. Hello Tetoldini You should find a Coupler entity under the Rackpin Steering system where you can change the coupler ratio. regards Praful
  2. Hello yehoo if you can describe the problem in more detail, people in the forum could be able to guide you with the most appropriate solution. To answer your questions, 1) You can also define "contact" by using an ActionReaction Force and using solver function IMPACT or BISTOP. You can mimic a point to point contact or to a certain degree point to curve contact using this approach. Any reason why you do not want to use 2D or 3D contact ? 2) When you define an output - force on body, MotionView creates a <Post_Request statement in MotionSolve xml for the connected joints|bushing|spring-damper|force entities to the body. These forces can be plotted in Hypergraph. They should be available under the type "Marker Force" and request for each type of above connections would be listed. In HyperView, once you load a result H3D you can go to Vector Plot. Force/Moments should get listed under Result type and select the Body (Assembly in HyperView) and click Apply. Force Vectors should appear on the body selected. Hope this helps. Regards Praful
  3. Hello - To further add to Chris's description, the solver MotionSolve does not support applying displacement initial conditions on the joint. Hence it is not available for editing in MotionView. regards Praful
  4. Hi Adit - What this error says is that the model was created with one set of wizard and the current wizard is a different one. Usually, the assembly and task wizards work together. The tasks in the task wizard are or can be configured based on what was selected in the model wizard. If there is a mismatch, the task wizard won't appear. Regarding the events not appearing, could you go to File > Load > Preference File , select "MBD Vehicle Dynamics Tools" and click Load. ? Did that work ? regards praful
  5. Hello Adit - Are you able to run any other models ? Is this the only model that you have trouble ? Are you able to run a simple model, say from MotionView tutorial MV-100 ? regards praful
  6. Hi Yehoo - what kind of geometry is it.? Is it a CADGraphic in MotionView ? For contacts, from a solver perspective, the geometry needs to be clean and able to obtain a closed volume. Hypermesh and MotionView have some differences on handling CAD graphics. It is possible that MotionView shows something as free edges, while Hypermesh does not. You may adopt a different method of representing the graphics. If you are able to mesh the surfaces of the components in HM and export as an h3d, the same can be used as Graphics of type File. and that graphics can be used in contacts. regards praful
  7. Hello Pritish - I am the Program Manager for MotionView and I would be interested to look into your problem. You can share this model if possible via email to me. (my address is mentioned below). Please be assured that the files you share will remain confidential. Alternatively, in case the model still cannot be shared, I have another recommendation in order to circumvent this problem. You may replace the graphics that are being used (I believe those are CADGraphics) by using File Graphics (H3d format) instead. You may use the "Import CAD/FE using Hypermesh option available under Tools menu. You might want to use the 2nd radio option there (Import CAD or Finite Element model only) to import as graphics and not create bodies. Once imported, you would have to manually resolve the bodies of each graphics to existing bodies. You can then delete the original CADGraphics and make sure that the new set of graphics are selected in the Contact panel. Regards Praful ppraf@altair.com
  8. Hello Rajesh - Custom templates in MotionView is driven through Assembly Wizard (Model menu) and Task Wizard (Analysis menu) These wizards are defined through wizard files. (.wzd) that defines the wizard GUI and instantiates systems/ Creating a wizard consists of following broad steps 1. For each of the sub-assembly, you can develop a system definition in MotionView and export it in the .mdl format (Systems Panel > Import/Export tab) 2. Build a wizard definition (.wzd) using the Wizard language (syntax is available in help) that presents GUI choices for selecting systems. 3. Change the Wizard paths in the Model > Set Wizard Paths. You may change to User/Custom library to begin with. Change only the model wizard and task wizard options Now, whenever Assembly wizard is invoked, it should present the wizard related to your library. I am attaching here a simple example that should demonstrate how the wizard and library can be built. After unzipping, just follow step 3 above (as 1 & 2 is already done) to exercise the example. Note that often after system definition is created, it might have to be tweaked manually using a text editor. Good luck ! Praful Pendu_wizard.zip
  9. Hello Sushanth - Would it be possible to share the model/graphics files ? It will help us diagnose the issue. Regards Praful
  10. Hello Viktor - An mnf can be converted into H3d and then the h3d can be converted into mtx. These two tools are available in MotionView's FlexPrep tool from the FlexTools menu. See attached image Regards Praful
  11. Hello Stefano - I believe you need to create a curve entity that represents the force v/s deflection behavior of the joint (compliant joint). Once the curve is defined, you need to refer it in the "Curve" collector (the yellow button seen in the panel above). The independent variable of DX is correct. I have attached an example and demonstrated how the curve is defined as well as the joint. only difference is that the nonlinear force-deflection is represented in Z direction of the joint. (not the model) Hope this helps Regards Praful comp_joint_nonlin.mdl
  12. You are welcome Note that, this is kind of a macro tool, that helps in creating points in relation to a marker. Ultimately, the point coordinates in the panel are represented through functions called as location functions such as loc_rel_to, loc_cylindrical etc.. Once these points are created, any modification needs to be done in the panel, by editing these function expressions. Regards Praful
  13. Hello - You should be able to do this by using the "Parametric Points" tool. In 2017.2, it is available in the side toolbar as shown in the attached image Regards Praful
  14. Hi Uday - If the motion is sinusoidal in nature, you can define the motion using an expression e.g: `60d*SIN(2*PI*TIME)` Here the body will move 60 degrees in one direction and then back to mean position and again 60 degrees in the opposite direction in one second. (1 hz) If you want to change the frequency of this osscilation, change the "2*PI" portion. e.g. `60d*SIN(4*PI*TIME)`. Now this oscillation is 2 Hz Is that what you are looking for ? Attached is a simple pendulum model that uses such an expression. Run this model, review the animation, and see if it matches your requirement. Regards Praful pendulum1.mdl
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