Dear Bentley Support,
I am currently code checking the legs of a MOPU during transportation as shown below.
The hull will be pinned at EL+2.4 m.
From the ABS code, the legs should be checked against a 6 deg pitch / roll and 0.2g of heave.
Therefore, the we have created the tow input file as follows:
Angular Acceleration ( deg/s2 )
Translational Acceleration ( g )
A
T
Pitch
Roll
Yaw
Sway
Surge
Heave
deg
s
X
Y
Z
Pitching
6.00
10.00
2.37
0.13
Rolling
Heaving
0.20
I am certain that by using the above input, inertial forces generated for the legs above the waterline would be correct.
However, for the legs submerged in water, is it necessary to manually apply added mass and mass of entrapped fluid in order to generate the correct inertial forces?
Looking forward to your response.
Samsul,
The only way to generate added mass and entrapped mass in SACS is through the Dynpac analysis. You can specify the added mass coefficient and flooding options on the DYNOPT line of the Dynpac input file. The added mass and entrapped mass will be reported in the Dynpac listing file after running a mode shape extraction analysis. You can then apply masses as member or joint weight in your tow input file to account for the additional inertial loading.
Regards,
Geoff
Answer Verified By: Samsul Bahrom