Jump to content

Amasker

Members
  • Content Count

    117
  • Joined

  • Last visited

Everything posted by Amasker

  1. Hi, I have learned Optistruct for some days,there is a question about Optistruct, How to use Optistruct to optimize at the same time under two load conditions, for example, a component is optimally designed under tension and is also optimally designed under bending? That is to say,Optimization under two load conditions, that is, how to make the design optimal under tension and optimum under bending conditions. Thanks.
  2. Hi, How to use the high performance cloud computing platform in the figure below? I need some help, thanks
  3. Hi, how to use the high performance cloud computing platform in the figure below? I need some advices,thanks
  4. Optistruct seems to be able to do some simple collision simulations.
  5. Hi, I did a simple collision simulation using Optistruct and the results in the time velocity curve are shown below。 Why is there no trend for speed increase and then decrease? Then, I don't understand why this speed is so high, How to set the collision time in Optistruct, just like in Radioss or Ls-dyna, Need to establish contact between the rigid wall and the collision body? Regards
  6. @Prakash Pagadala In the.0001 file ,the error messages details shows following, ERROR : NEGATIVE STIFFNESS NODE Could you give me some advice ? How to solve this kind of question?thank you
  7. Thank you,could you provide the method about how to constraint the rigid tube?
  8. @Prakash Pagadala The offset element Tie with the original element, but is not in contact with the rigid wall, and how to restrain the rigid wall from slipping? Please check the .fem file,thank you。
  9. @Prakash Pagadala I don't know what do you mean?I'm confused abou the contact between the rigid wall and the B-pillar? In addition, there is a downward slide after the collision, how to prevent this from happening
  10. Hi,Recently encountered this problem *** ERROR # 4002 *** Running RADIOSS engine, 2 ERRORs and 0 WARNINGs have been detected. They are listed below. ENGINE ERROR: ** RUN KILLED : ENERGY ERROR LIMIT REACHED ENGINE ERROR: ** RUN KILLED : ENERGY ERROR LIMIT REACHED Then I checked the .0001 file,find the following error: *** PARTS WITH HIGHEST KINETIC ENERGY PART_ID K-ENERGY PROP_ID PROP_TYPE MAT_ID MAT_TYPE 8 0.9779E+42 8 11 3 25 5 0.2085E+17 5 1 2 2 4 5274. 4 1 2 2 *** PARTS WITH HIGHEST INTERNAL ENERGY PART_ID I-ENERGY PROP_ID PROP_TYPE MAT_ID MAT_TYPE 2 0.1588E+44 2 1 2 2 8 0.3382E+34 8 11 3 25 3 0.2991E+26 3 1 2 2 6 0.3831E+15 6 1 2 2 5 0.6502E+09 5 1 2 2 4 0.1186E+08 4 1 2 2 *** NODES WITH HIGHEST VELOCITY NODE VELOCITY K-ENER MASS MASS0 DM/MASS0 2115893 0.4969E+20 0.8813E+31 0.7140E-08 0.1963E-08 2.637 2115885 0.1871E+20 0.3213E+31 0.1836E-07 0.3914E-08 3.692 2115894 0.1445E+20 0.8372E+30 0.8017E-08 0.1981E-08 3.047 2021296 0.8145E+19 0.000 0.000 0.2616E-08 -1.000 2021295 0.6374E+19 0.000 0.000 0.4702E-08 -1.000 2115886 0.5165E+19 0.2000E+30 0.1499E-07 0.3825E-08 2.920 2813216 0.4677E+19 0.000 0.000 0.2000E-08 -1.000 2813011 0.4677E+19 0.000 0.000 0.3984E-08 -1.000 2813103 0.4676E+19 0.000 0.000 0.8164E-09 -1.000 2021031 0.3395E+19 0.000 0.000 0.2111E-08 -1.000 I can't figure out the reason about it,element?velocity?mass? I don't know, The out_frp.fem workd ,The outer plate is a steel plate and the inner plate is a composite material. But in B_frp_gai_dynamic_surf_1.fem ,I just make some changes,offset some element for composite,then,the error occurs。 Can someone help me check the reason of the error? B_frp_gai_dynamic_surf_1.out B_frp_gai_dynamic_surdebian_rad_s1_0001.out
  11. @Prakash Pagadala I am sorry trouble you all the time,I have another question,puzzled for some time,error as followes ERROR ID : 556 ** ERROR IN INTERFACE TYPE2 DESCRIPTION : -- INTERFACE ID : 3 -- INTERFACE TITLE : INTER_TYPE2_3 MASTER NODE ID=2115444 IS ALSO SLAVE NODE OF ANOTHER INTERFACE TYPE2 I figured out where is wrong,but I can't solve it
  12. Thanks,@Prakash Pagadala *** INFORMATION # 1579 for material id = 2 referenced from property id = 2. MATS1 referred to from MID3 will be ignored - plasticity is supported for membrane and bending deformation, but not for transverse shear. What does this information mean?MATS1 doesn't work?
  13. Thanks,@Ivan, I will try again.
  14. @Prakash Pagadala I tried NLSTAT analysis step,but it seems doesn't work B_frp_gai.out
  15. @Ivan I am sorry I didn't express it clearly ,how to define plasticity under constant static load? I tried NLSTAT analysis step,but it seems doesn't work B_frp_gai.out
  16. @Prakash Pagadala So how to define plastic in linear static analysis?
  17. @Prakash Pagadala But, I applied the static load in the model, the loadstep is not explicit dynamic.
  18. @Prakash Pagadala Ask a question about the definition of elastoplastic material, apply a static load in the middle of the B-pillar, material type MATS1, but the .out file suggests that the elastoplastic material setting is invalid. As follow: *** INFORMATION # 1579 for material id = 2 referenced from property id = 2. MATS1 referred to from MID3 will be ignored - plasticity is supported for membrane and bending deformation, but not for transverse shear. I don't know why?can you give some advices? thank you.
  19. @Prakash Pagadala, Hi,Why are there so many errors in the .0001 file? However, no errors were indicated when submitting the calculation. Why is that? How to properly set up contact to avoid this kind of error? B_frp_offset_001.out
  20. Hi,How to solve this kind of error? *** ERROR # 4002 *** Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected. They are listed below. ENGINE ERROR: ** RUN KILLED : ENERGY ERROR LIMIT REACHED B_frp_offset.out
  21. @Prakash Pagadala I checked the .out file,following is error showing in the file。 *** ERROR # 4002 *** Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected. They are listed below. ENGINE ERROR: ** RUN KILLED : ENERGY ERROR LIMIT REACHED I modified the element、contact property、interface etc。But still have the above problem, How to correct the error above? thanks b_pillar.10m.1T.delete_top.out
  22. @Prakash Pagadala I ran the file ,But why is there such a big deformation, just like distortion? b_pillar.10m.1T.h3d
  23. @Prakash Pagadala So what if I want to calculate the stress strain of the composite under collision? And I want to do the optimization design of composite materials under collision. Any suggestions?
  24. @Prakash Pagadala After all the outputs are deleted, the operation is successful, but there is a problem. Why does the rigid wall bounce after the collision and stop moving in the opposite direction for a long time? How to control the rigid wall to stop after the collision, like a car Like a collision, there is still a problem. If all the outputs are deleted, the calculation will lose its meaning. I am confused whether Optistruct can run composite optimization analysis and size optimization analysis in explicit dynamic analysis.
×
×
  • Create New...