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      Please click here for a short but important announcement   03/26/17

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vikas kenchapur

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  1. Yes, please constrain them using SPCs Thanks, Vikas
  2. Balram, Please use the below link to upload the model/deck https://ftin.india.altair.com:8443/dropbox/~KIMbsp Thanks, VIkas
  3. Hi Balram, I took a look at the .out file, the non-convergence is due to contact chattering. Please attach the deck here, I shall modify the deck and send it across to you Thanks, Vikas
  4. Hi Alekh, You can either constrain the mount or define a FREEZE contact between the Caliper Mount and Kunckle at the contact region Thanks, Vikas
  5. Hi Sumanth, Strain response is currently not supported. As an alternative you can try defining STRESS as a constraint in topology optimization using the below option (Analysis > Optimization > Topology > Parameters > Stress constraint -DTPL card) Thanks, Vikas
  6. Hi Alekh, I presume you don't have the caliper mount component and the Knuckle would sit on this caliber. if yes, you can constrain the nodes of the Kunckle which sits on the mounts using SPCs The better way to model the bolts in the assembly is to tighten them by pretensioning analysis. You can apply bolt pretension in OptiStruct and make the cover come into contact. Else, you can just define a FREEZE type of contact between the cover and bolt head Let is know if you need any further information Thanks, Vikas
  7. Hi Balram, The structure must have reached its limiting point and hence not able to converge with N-R method Do you have contacts in the model? I prefer looking at the model in detail,please let us know if you could share the deck? Thanks, Vikas
  8. Hi Sai Kiran, What is the command you are using to retrieve the eigen vectors Also make sure the Eigen Save is in the same folder from where you are running the job Thanks, Vikas
  9. Hi JM, Yes, in case you don't want to impose a velocity to control the hammer as i suggested above you can attach few springs to the nodes of the hammer and define the load vs displacement curve to the spring element using /PROP/SPRING card. Let us know how it goes! Thanks Vikas
  10. http://www.altairhyperworks.com/training/new_feature_videos/14/videos/OS/fast_cont/fast_cont.htm
  11. Hi JM, You can actually define a time history curve which defines the imposed displacement and attach it to the master node of the RBODY ( Impactor) The time history curve can be defined in a such a way that, it is impacted with certain displacement to begin with and the displacement dies down to zero. For example: X (time) Y(Imposed Displacement) 0.0 0.0 0.1 1.0 0.2 3.0 0.3 0.0 Above, the hammer moves a distance of 3mm at 0.2sec and comes to it's original position at time 0.3sec. If you want to connect the Hammer with a spring and control the motion, then you can actually define a load vs displacement curve similar to the above with /PROP/SPRING property card Let us know if this helps! Thanks, Vikas
  12. Sure, I shall pass on this model internally within the team. We shall get back to you shortly. Thanks, Vikas
  13. Hi Ashu, Could you please attach the input deck or the .hm file Thanks Vikas