Reply To: AQWA-FER failed to Converge for Configuration/Spectrum

[Shuangxing Du]

For the case of "The selected accelerations on the cargo are about the structures local axis. which is on the water line. But in octopus, the accelerations are about the local structure axis which lies at the APP at keel level.", if the axis directions of the structure local axes of Aqwa and octopus are the same, the accelerations on the cargo should be the same.

Have you define any the hull drag coefficients/Morison elements in the frequency statistic analysis? The linearization of the nonlinear drags may cause convergent problem if the drags are not defined properly.