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#60171 - 08/25/14 11:31 PM Note in WRC 107 lifting lug calculation (horizontal vessel)
akulabest Offline
Member

Registered: 11/22/11
Posts: 3
Loc: Malaysia
good day all..can somebody explain what is the meaning of Note as per below (in bolded red text)? This is WRC 107 analysis in lifting lug calculation.

Circumferential Shear VC 0.0 N
Longitudinal Shear VL -1187.2 N
Circumferential Moment MC 0.0 N-m
Longitudinal Moment ML -35.6 N-m
Torsional Moment MT 0.0 N-m
Dimensionless Parameters used :
Gamma =5.92
Dimensionless Loads for Cylindrical Shells at Attachment Junction:
-------------------------------------------------------------------
Curves read for 1979 Beta Figure Value Location
-------------------------------- -------- --------- --------- ---------
N(PHI) / ( P/Rm ) 0.168 4C 1.128 (A,B)
N(PHI) / ( P/Rm ) 0.168 3C 1.067 (C,D)
M(PHI) / ( P ) 0.100 2C1 0.184 (A,B)
M(PHI) / ( P ) 0.100 1C 0.210 (C,D)
N(PHI) / ( MC/(Rm**2 * Beta) ) 0.090 3A ! 0.048 (A,B,C,D)
M(PHI) / ( MC/(Rm * Beta) ) 0.118 1A 0.104 (A,B,C,D)
N(PHI) / ( ML/(Rm**2 * Beta) ) 0.143 3B ! 0.373 (A,B,C,D)
M(PHI) / ( ML/(Rm * Beta) ) 0.128 1B 0.061 (A,B,C,D)
N(x) / ( P/Rm ) 0.136 3C 1.120 (A,B)
N(x) / ( P/Rm ) 0.136 4C 1.157 (C,D)
M(x) / ( P ) 0.142 1C1 0.176 (A,B)
M(x) / ( P ) 0.142 2C 0.144 (C,D)
N(x) / ( MC/(Rm**2 * Beta) ) 0.090 4A ! 0.068 (A,B,C,D)
M(x) / ( MC/(Rm * Beta) ) 0.165 2A 0.062 (A,B,C,D)
N(x) / ( ML/(Rm**2 * Beta) ) 0.143 4B ! 0.095 (A,B,C,D)
M(x) / ( ML/(Rm * Beta) ) 0.177 2B 0.089 (A,B,C,D)
Note -The ! mark next to the figure name denotes curve value exceeded.
thank you..

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#60191 - 08/26/14 11:34 PM Re: Note in WRC 107 lifting lug calculation (horizontal vessel) [Re: akulabest]
mariog Offline
Member

Registered: 09/29/07
Posts: 798
Loc: Romania
The curves used in WRC 107 calculations are bounded by finite limits.
The note says that the values are obtained by extrapolation.
IMO, WRC 107 cannot be applied if you exceed the limits.

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