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Contact incinident information

Hello,
 
I am trying to extract information about the contact incidents in Adams, in order to exact the times at wich more than 1 gear tooth pair of an involute gear model come into contact. I understand that after the simulation, I can look at the contact incidents and tracks, but if possible, I'd like to be able to extract the incidents during simulation, in the form of measurements.
 
Thanks,
 
Josef K.
Parents
  • Hi Josed,
     
    As Henrik indicated, we currently do not provide access to detail contact info during run-time unless you use the CNFSUB user-written subroutine. Please also note that to update the contact stiffness during run-time, you would need to use CNFSUB, because the default CONTACT object/statement only accepts constant stiffness values.
     
    One other approach that you may be able to take advantage of for detecting contact of various gear teeth is to split the geometry of each gear such that each tooth is a separate geometry. Then you can create many CONTACT elements out of the combinations of these tooth pairs. This bring two other advantages: (1) nodal contact detection algorithm will run faster as it now deals with smaller geometries rather than the whole gear geom. and (2) you can take the most from SMP with multiple contacts. It may be worth a try to see if you can decrease run times.
     
    HTH,
    Maziar
Reply
  • Hi Josed,
     
    As Henrik indicated, we currently do not provide access to detail contact info during run-time unless you use the CNFSUB user-written subroutine. Please also note that to update the contact stiffness during run-time, you would need to use CNFSUB, because the default CONTACT object/statement only accepts constant stiffness values.
     
    One other approach that you may be able to take advantage of for detecting contact of various gear teeth is to split the geometry of each gear such that each tooth is a separate geometry. Then you can create many CONTACT elements out of the combinations of these tooth pairs. This bring two other advantages: (1) nodal contact detection algorithm will run faster as it now deals with smaller geometries rather than the whole gear geom. and (2) you can take the most from SMP with multiple contacts. It may be worth a try to see if you can decrease run times.
     
    HTH,
    Maziar
Children
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