About Global element Force and restraint summary

Posted by: zzw

About Global element Force and restraint summary - 12/22/11 08:38 AM

please to see the PIC for the model

when I calculate a pipe model,I find the diffence of the Global element Force and restraint summary for the same case and node, please to see the result:

CASE 46 (OPE) W+D4+T1+P1+H-U1+F1

Global element Force
FX(N) FY(N) FZ(N) MX(N/M) MY(N/M) MZ(N/M)
1261 -60486 -278988 43800 -9483 0 -13120
1262 60715 279753 -43800 0 0 0

restraint summary
FX(N) FY(N) FZ(N) MX(N/M) MY(N/M) MZ(N/M)

46 (OPE) -60715 -279753 46190 0 0 0
I Think :46190=60715*0.3+279753*0.1

but 60715*0.3+279753*0.1≠43800

(43800-46190)*100/46190=5.17% is this the calculation error ?

who can help me deal with this question?
thanks lot

Posted by: Dave Diehl

Re: About Global element Force and restraint summary - 12/22/11 09:33 AM

The restraint summary provides total loads. The proper normal loads that you want are found in the regular restraint report. Calculate each restraint response there and then combine the results to match the summary.
Posted by: zzw

Re: About Global element Force and restraint summary - 12/22/11 09:45 AM

this is support ,it is the summary. I think it is the nonlinear calculation error. because all are the same for the Global element Force and restraint summary for the same case and node in the other same support in this pipe model. only this happen the situationin the node 1262
Posted by: zzw

Re: About Global element Force and restraint summary - 12/22/11 09:59 AM

but there is another question,if 10 node is an ANC(element 10-1252 dx:0 dy:0 DZ: 20000 mm),the FZ is 43800 N in the node 10 ,BUT not 46190 N;because when you solve the finite element function with element relationship
this situation happen in the pipe model