Dear all
We have a doubt in load case building for a PSV force
Initially we built the load case as follows
L1 W+P+T+F
L2 W+P+T
L3 W+P
L4 F
L5 L2-L3(EXP)
L6 L3+L4(OCC) SCALAR COMB for Stress check
then we tried the following combination
L1 W+P+T
L2 W+P
L3 F
L4 L1-L2(EXP)
L5 L2+L3(OCC) SCALAR COMB for Stress check
L6 L1+L3(OCC) SCALAR COMB for Loads
The loads in the two cases viz., L1 of first combination and L6 of second combination were varying by large margin.Fyi there is non linearity in the form of friction.
then in the second combination we changed the combination type as algebraic for case L6 which produced the same result ( loads only) as that of Scalar
Now the two cases ,
W+P+T+F
and
W+P+T ( algebraic or scalar combination ) with F (seperately combining )
we would like to hear from you experts to clarify us why there is a difference between these two in terms of loads.
And also which combination method is right to evaluate the PSV forces in the system.
_________________________
Regards
Narine