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  1. Thank you for your answer. Loading condition is as follows. (/CLOAD) <- loading curve Unit system is [N], [mm], In my model, there is a contact interface between Yellow component and Green component. (TYPE 7) TYPE 7 setting is as follows. In the model, there is a rayleigh damping applied on the Yellow and Green component. -> Total energy decrease graudally. Plotting result is as follows. In the output file, negative energy error is -34.4%. Why is this so high? Thanks
  2. Hi, Translational total energy and External force work are same? In referernce guide, energy is as follows. In this topic, However, in my case, Why are they different?? Thanks
  3. Hi, In radioss manual, there is a contact energy formulation. This formulation considers normal force and tangential force? or only consider normal force? What is the 'L' and 'n'?? Thanks
  4. Hi, In RADIOSS theory manual, TYPE7 contact energy formulation is as follows. In formulation, what is the 'L' and 'n' ?? I think this contact energy formulation is only about normal contact force. Is there any formulation about tangential contact force? I want to know the reference about the formulation. Thanks.
  5. Hi This figure shows the accelerations on the node using /TH/NODE and /TH/ACCEL. F_cut of /ACCEL is the recommended value (1650Hz). Filter CFC1000 (F_cut 1650Hz) is applied the acceleration using /TH/NODE. Why are they different? Thanks.
  6. Thank you for your answer
  7. Hi, I want to use /TH/MODE. I can't find it in HM. How can I find it?? Thanks.
  8. Hi, I want to check interface stiffness in TYPE7. Solver compute interface stiffness automatically every time step. How can I check it? Thanks
  9. Hi, The problem is as follows. After 1 cycle, run file stops. Why doe it happens? How do I do? Thanks
  10. Thank you for your answer. In your answer, for x-direction DOF, Stif0 in the SPR_PRE replace k1 in the SPR_BEAM and for other direction DOF, k2-k6 in the SPR_BEAM is used. I have a question. Why should another SPR_BEAM be added? Thanks
  11. Hi, I want to activate boundary condition (like fixed boundary condition) at certain time ( ex) after 2sec ). Is it possible? How can I do that? Thanks
  12. Hi, I have a question that comes from the user guide. (Radioss 2019 User's Guide p.239) 'To describe pretension with this method another two spring elements (/PROP/SPR_PRE and /PROP/ SPR_BEAM) need to be added.' I have an example. When the bolt joint with preloading (bolt joint stiffness 10000N/m, preload 10kN) is replaced by RBODY+SPRING element, 1) Distance between node1,2,3 is 10mm? 2) In PROP/SPR_BEAM, K1 is 20000N/m? (due to series spring??) 3) In PROP/SPR_PRE, Stif0 is 10000N/m? (same as bolt joint stiffness) Thanks
  13. Hi, I want to find the theory manual about interface type 24. Where is it? Thanks
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