Rigging Calculation [PDF]

Citation preview

Project WCR No



Prepared by Checked by Date



: Lifting of Rocker Arm :



: Azlan : : 27-07-2009



1.0 C.O.G GEOMETRY DIMENSION PLAN DETAILS 6096 3048



3048



A1



B1











3201



3201



6402



C.L



CoG 3201



3201











CL



A2



B2 3048



3048



2.0 PADEYE ORIENTATION



A1



3048



 3201



tan 1 =



1 =







3201



tan 2 =



3201 3048



3201 3048



2 =



46.40 deg.



3201



A2



B1



3048







46.40 deg.



3201



 3048



tan 4 =



4 =



3048



3201 3048 46.40 deg.



tan 3 =



3 =



B2



3201 3048 46.40 deg.



0 Project WCR No



: :



Prepared by Checked by Date



Lifting of Rocker Arm 0



: : :



3.0 PADEYE CENTRE HOLE COORDINATE



Z =



-200



Z



X1



A1



X2



46.40



B1 46.40



Y2 Y1



X1 = -200 = -138



cos 46.40 mm



X2 = -200 = -138



Y1 = -200 = -145



sin 46.40 mm



Y2 = -200 sin 46.40 = -144.84 mm



Y4



A2



46.40 X4



cos 46.40 mm



Y3



46.40 X3



B2



X4 = -200 = -138



cos 46.40 mm



X3 = -200 = -138



cos 46.40 mm



Y4 = -200 = -145



sin 46.40 mm



Y3 = -200 = -145



sin 46.40 mm



Azlan 0 27-07-2009



0 Project WCR No



Prepared by Checked by Date



: Lifting of Rocker Arm : 0



: Azlan : 0 : 27-07-2009



4.0 RIGGING GEOMETRY ON PLANE



-138



3186



3186



-138



A1



B1







-145







-145



L A1 L B1 3346



3346



3346



3346



L B2 L A2 -145











-145



A2



B2 -138



3186



3186



-138



L A1



= [( 3186 )2 + ( = 4620 mm



3346



)2]1/2



L B1



= [( 3186 )2 + ( = 4620 mm



3346



)2]1/2



L A2



= [( 3186 )2 + ( = 4620 mm



3346



)2]1/2



L B2



= [( 3186 )2 + ( = 4620 mm



3346



)2]1/2



5.0 VERTICAL REACTION AT PADEYES: BASE CASE



Jacket Base Weight = 142



MT



Contingencies of 10% = 4.3



MT



Padeye Design Weight, WL = 146.3



Rigging Weight = 20 Sling Design Weight,WP = 166.3



MT



RA1



=



3048 6096



x x



3201 6402



x



166.26



=



41.6



MT



RB1



=



3048 6096



x x



3201 6402



x



166.26



=



41.6



MT



RB2



=



3048 6096



x x



3201 6402



x



166.26



=



41.6



MT



RA2



=



3048 6096



x x



3201 6402



x



166.26



=



41.6



MT



=



166.3



MT



Total



MT MT ( 183 ST)



0 Project WCR No



Prepared by Checked by Date



: Lifting of Rocker Arm : 0



6.0 VERTICAL REACTION AT PADEYES: OPTION CASE Vertical Reaction based on 75/25 load distribution method.



(As per SES 11.4)



6.1 SUPPORT LOADS *equations derived from sketch above Equ. 1



:



RA1



+



RB1



=



83.1



MT



Equ. 2



:



RB1



+



RB2



=



83.1



MT



Equ. 3



:



Equ. 2



-



Equ. 1,



RB2



-



RA1



=



0.0



6.2 LOAD CASE 1 - 75% OF LOAD ACROSS DIAGONAL A1 - B2 Equ. 4



Equ. 5



Equ. 5



RB1



:



:



into



into



RA1



+



Equ. 4



Equ. 2



Equ. 1



RA1



+



RB2



=



Equ. 3,



,



RB1



,



+



RA1



+



0.75 x W L =



RB1



+



+



RB2



0.75 x



166



=



125



MT



2 RB2



=



125



RB2



=



62.35



=



RB1



=



20.7825 MT



20.78



=



83.13



RA1



=



62.3475 MT



+ RA2



=



RA2



=



62.3475 MT 83.1



166 20.7825 MT



6.3 LOAD CASE 2 - 25% OF LOAD ACROSS DIAGONAL A1 - B2 Equ. 6



Equ. 7



Equ. 7



RB1



:



:



into



into



RA1



+



Equ. 6



Equ. 2



Equ. 1



RA1



+



RB2



0.25 x W L



=



0.25 x



=



41.57



Equ. 3,



,



RB1



,



+



=



RA1



RB1



+



+



+



RB2



166 MT



2 RB2



=



41.565



RB2



=



20.7825 MT



20.78



=



RB1



=



62.35



=



RA1



=



+ RA2



=



RA2



=



83.13 62.3475 MT 83.13 20.7825 MT 166 62.3475 MT



MT



: Azlan : 0 : 27-07-2009



0 Project WCR No



Prepared by Checked by Date



: Lifting of Rocker Arm : 0



: Azlan : 0 : 27-07-2009



7.0 TRUE SLING ANGLE



H = Vertical height



S1



= 8000



8000



S2



8000



 A1







4620



 = tan-1



8000 4620



= 59.99



S1 = 4620.0345 cos 59.99



S4



 = tan-1



deg.



S2 =



= 9238 mm ( 30.3 ft )



8000



8000 4620



4620 cos 59.99



S4 =



deg.



= 9238 mm ( 30.3 ft )







4620



 = tan-1



= 59.99



S3



8000



 A2



B1



4620



B2



4620



8000 4620



4620 cos 59.99



= 59.99



 = tan-1



deg.



S3 =



= 9238 mm ( 30.3 ft )



8000 4620



4620 cos 59.99



= 59.99



deg.



= 9238 mm ( 30.3 ft )



8.0 SUMMARY OF VERTICAL REACTION AT PADEYES. Padeye Base Case



Vertical Load Opt. Case 1



Opt. Case 2



Max. Load (MT)



SSL* (MT)



Required MBL (MT)



A1



41.57



62.35



20.78



62.35



72



288



B1



41.57



20.78



62.35



62.35



72



288



B2



41.57



62.35



20.78



62.35



72



288



A2



41.57



20.78



62.35



62.35



72



288



Total



166.26



166.26



166.26



249.39



288



1152



ATLAS OFFSHORE - TES Project : Lifting of Rocker Arm WCR No : 0



Prepared by Checked by Date



: : :



Azlan 0 27-07-2009



STRUCTURAL WEIGHT CALCULATION 1.0 For Padeye Design a) Roker Arm (Weighing) given wgt



=



162.0 MT



( Including



20.0 MT



Rigging Weight)



b) Actual Module 2 weight



=



142.0 MT



( Excluding 20.0 MT



Rigging Weight)



c) Contingencies of 10%



=



14.2 MT



d) Weight for Padeye Design



= Item b + Item c =



e) Load for Padeye Design Calculation



156.2



MT



= Static Sling Load (SSL) x 2.0



2.0 For Sling Design a) Roker Arm (Weighing) given wgt



=



162.0 MT



( Including



20.0 MT



Rigging Weight)



b) Actual Module 2 weight



=



142.0 MT



( Excluding 20.0 MT



Rigging Weight)



c) Contingencies of 10%



=



4.26 MT



d) Actual Rigging Weight



=



20 MT



d) Lift Weight for Sling Design



= Item b + Item c + Actual Rigging Weight =



e) Load for Sling Design Calculation



166.3



MT



= Static Sling Load (SSL) x 4.0