Moment Application to lumbar spine model

Tim S.
Tim S. Altair Community Member
edited October 2020 in Community Q&A

Hello,

i have a "little" problem regarding application of a torque. I have a model of the lumbar spine (L1-L5). I want to apply a torque on the first vertebra (L1). After the simulation finished (Solver: Radioss)  and i look at the results, i can't detect any movement in the model (i have constrained L5 in all 6 DOF, but nothing else). Does anybody know what could be the solution to this problem? Thanks in advance!

I tried to attach the rad Files but they are too large. I have copied the (imo) relevant section below.

Cheers, T

##HWCOLOR curves 12 11
/FUNCT/12
Moment_Curve                                                                                        
                 0.0                 0.0
              0.0313              0.6474
              0.0627              1.4949
               0.094              2.6021
              0.1254              4.0447
              0.1567               5.918
              0.1881              8.3401
              0.2194             11.4548
              0.2508             15.4328
              0.2821             20.4705
              0.3135             26.7847
              0.3448             34.6026
              0.3762             44.1455
              0.4075             55.6083
              0.4389             69.1373
              0.4702             84.8113
              0.5016            102.6302
              0.5329            122.5154
              0.5643            144.3205
              0.5956            167.8505
               0.627            192.8843
              0.6583            219.1946
              0.6897            246.5646
               0.721            274.7978
              0.7524            303.7236
              0.7837            333.1983
               0.815            363.1036
              0.8464            393.3445
              0.8777            423.8449
              0.9091            454.5455
                10.0             10000.0

____________________________

##HWCOLOR loadcollectors 8 57
/CLOAD/8
Torque                                                                                              
        12        XX         5                  31                           1.0                 1.0

_____________________________

/GRNOD/NODE/9
Torque_MN_Torque                                                                                    
      3978

_____________________________

Answers

  • Rogerio Nakano_21179
    Rogerio Nakano_21179 New Altair Community Member
    edited January 2021

    Hi

    The /CLOAD is using the grnod id 31.

    Is this the Grnod you want to use? or is the Grnod id 9 as listed on your message?

     

    Regards