Problem:

How are the seismic load is calculated in AutoPIPE Vessel?

Solution:

The force (f_r,ho) as per the formula is in (N) and printed out in (daN) in the report.

f_r,hor = m_i u_i D a_ch => (kg) (mm) (mm^-1) (m/s²) = kg m/s² = N

Example of the calculation (the printed values are rounded/truncated in the Report):

f_r,hor = 46.08358 * 0.019699505 * 2049.837 * 4.767313

= 887.1449 N

= 88.71449 daN (rounded to 88.71 daN in the Report)