Applying Roll & pitch value in FEA

Hello Guys,

Need some urgent help. I have to check a structure's strength which is going to be installed on a FPSO. as per the client they need to check the strength of that structure with respect to pitch of 12 degree and roll of 23 degree as per the FPSO movement. So my question is there a way to apply these boundary condition.. or do i need to apply the  acceleration in a way to the model. please help.

Thanks in advance

Devi Samal

SolidworksSimulation