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Henry26

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  1. Hello everyone! I'm performing an analysis with a pairs of gears. I've used RBODY do transfer the load. About the load, what card should I use for the angular velocity? INIVEL/AXIS, IMPVEL or INIVEL? And why? I did some analysis with different values for velocity using card IMPVEL and I didn't found any difference in stress results, somebody know why? PS: the analysis contain torque with the card CLOAD_Collector in XX Could, please, somebody help me? Thanks in advance! Henry
  2. Hello everyone, I've performed a non-linear quasi-static with seven components. I applied a moment in the middle component that transfer the load to the others gears. The behavior of others component are according to the expectations. But when I assign 20% of scale in deformation (in order to see the animation) the middle component has a strange behavior. Someone knows why does it happen? Follow the pictures before and after assigned the scale. Thanks in advance. Henry
  3. @Q.Nguyen-Dai, you are right, I've used RBE3 instead of RBE2. Could be this the problem?
  4. Hello @Q.Nguyen-Dai, Thank you for your reply. I assigned a three RBE2. One in the middle of "GEAR A" and one in the middle of "GEAR B" and assigned a constraint in x, y and z (displacement) for each one, and I've assigned one RBE2 on face of "GEAR A" for the input torque. Then I've the following error: There were 2 error messages during input processing. The first message is repeated below: *** ERROR # 339 *** The dependent d.o.f. is constrained by grid or spc data. RBE3 element id = 178357. grid id = 33819. component = 1. Do you know how can I solve this? Thanks!
  5. Hello everyone!I'm performing a finite element analysis with a pair of gears and another component around this pair of gears. This system is named as "planetary gears". My model is simplified, just to see how will be the behavior of the system, I'm using the software Hypermesh with the solver OptiStruct. My question is, which degrees of freedom on "FACE 1" and "FACE 2" should I constraint to rotate "GEAR A" and "GEAR B" around the axis X.Degres of freedom:Displacement: x, y and zRotation: x, y and zI have attached the picture. Thanks so much in advance.Henry
  6. Hello @Prakash Pagadala, It's a FEA in a transmission for vehicles. So, instead of using all the componentes with the respectivity density and in order to simplify the analysis I've used a point of mass in a RBE3 linked to the inner surface of the housing. In this way, I put a mass point concentraition at CG and then applied a vertical gravity acceleration. I know that if I use all the density of each component I will have a better result, but I'd like to know the influence of the simplification and because this I'm looking for a way to perform this analysis.
  7. Hello everyone, I'm performing a FEA with gravity acceleration as load case and a point of mass concentration located at CG. I linked this point of mass with RBE3 in all inner surface of the componente. My doubt is: Is it correct link this point of mass only in inner surface? Or should I link that with others surfaces, like outer surface. Thanks in advance!
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