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Rahul R

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Everything posted by Rahul R

  1. Please refer OptiStruct example guide below example: OS-E: 0110 Elastic-Plastic Large Displacement Analysis
  2. OptiStruct 2019.1 supports viscoelastic material. Viscoelastic material Viscoelastic material through the MATVE Bulk Data Entry is supported for Small Displacement Nonlinear Analysis. Currently, CHEXA, CTETRA, CPENTA, and CPYRA elements are supported. Viscoelastic material can be activated by using the VISCO Subcase and Bulk Entries.
  3. can you try by n2-n1 instead of sweep all and select the n1 n2 along thickness.
  4. While post processing in HyperView we have the option of use symmetry. Refer attached screenshot. Note: OptiStruct 2019 supports Nonlinear Axisymmetric Analysis(this model is not a axisymmetric part)
  5. Can you try by constraining only first three dof for RBE2 element.
  6. Please try with OptiStruct 2019.1.Documentation is updated for 2019.1 LATPRM CLEAN. LATPRM CLEAN 2019.1.pdf
  7. Orientation support for layered solid composites - PCOMPLS is available from HyperWorks 2019.0.You can define material orientation using curves.
  8. Please refer below post. Note: If possible, please create new post for new topic.
  9. You can use Rigid elements. This would help to transfer loads from master node to slave nodes.Then you could define master node as design constraints for displacement.Refer below tutorial: OS-T: 2010 Design Concept for an Automotive Control Arm
  10. Please refer attached screenshot from OptiStruct online help & specify the physical distance including shell thickness in the SRCHDIS field.
  11. can you please share us the .out file of the run?
  12. Since objective is to analyse a motor. Bearing simulation will add nonlinearity in to dynamic analysis. Bearing modelling is available with Altair Simlab. I remember there is one old script available in script exchange to provide bearing pressure. Altair SimLab sT: Multiphysics product performance
  13. The dependent node is constrained with SPCs which is not valid. Instead, constrain the independent node.Consider the RBE2 with only DOF in 123.
  14. My above reply is in context of Rotor Dynamics with OptiStruct. For rotating components, additional forces like the gyroscopic force and circular damping force exist and are critical in the study of their response. It is important to determine these effects of rotating components on the system as a whole. The objective is to determine , Analyze steady state maneuvers of vehicles which have rotors. Predict critical speeds and vibration frequencies for dynamic instability. Calculate amplitudes of synchronous vibration caused by rotor unbalance. Calculate frequency or transient response to externally applied synchronous/asynchronous loading. Attached some example for your reference. What is your end objective from the analysis? RD_TRG_MODELS.zip
  15. In accel card you need to specify at least two entries for the LOCi and VALi values. LOCi - Location of the scale factor to the applied acceleration load along direction DIR in the coordinate system CID. (Real) VAL - Load scale factor at the location LOCi. (Real) The acceleration load applied to all grid points in the model is given by: EQ. 1. a=VAL*N Where, a is the acceleration load and N is a vector with components N1, N2, and N3. So if you have a uniform acceleration in your model, by card editing the loads ACCEL, you can enter your two pairs of LOCi and VALi values. So I don’t know what your accel card looks like in your model but if you go by using these values then this should fix your error: LOC1 = 0, VAL1 = 1 LOC2 = 1, VAL2 = 1 Please let me know how you get on with this. Hope this helps!
  16. Please share the license file which you are using.
  17. Please make sure to assign material property and orientation of 1d element properly.
  18. Bearings can be added to the model which is typically connected to the stator using spring(CELAS) and damper(CDAMP) elements. Stiffness properties are added to the spring in the direction perpendicular to the rotor axial direction.
  19. PBEAR element type is not supported in HM-OptiStruct yet.However,Rotor dynamics is available in OptiStruct for modal frequency response, complex eigenvalue, static, linear direct transient and small displacement nonlinear direct transient analyses. Refer Optistruct online help for more details.
  20. MATT1:Bulk Data Entry Specifies temperature-dependent material properties on MAT1 entry fields via TABLEMi or TABLEG entry. Refer attached deck. Beam_thermal_structure_Matt1.zip
  21. Could you please share the .out file of the run ?
  22. Please refer attached material to use user defined material in OptiStruct. User defined material.zip
  23. DAREA is for dynamic loads whereas FORCE1 and FORCE 2 is for static loads. Combinations of dynamic loads (DAREA) with static loads (FORCE, FORCE1, FORCE2, MOMENT, MOMENT1, MOMENT2, PLOAD, PLOAD1, PLOAD2, PLOAD4, and RLOAD), is supported. Please refer free ebook on Dynamic analysis using OptiStruct using below link. https://altairuniversity.com/free-ebook-learn-dynamic-analysis-with-altair-optistruct/
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