nThank you so much for your reply. nRegarding Damping, I don't have damping data so I have used Full Harmonic Analysis. Is it ok? nIn FSI, My Aim is to find out acoustic pressure at a different location in air and water. I am following the attached paper for analysis. I am not sure, Should I have to use Two-way FSI or One Way FSI. In the paper, It shows FSI present between structure and acoustic part. nFor Acoustic part, I am referring following video made by nMy model's acoustic part is correct?.Thanks and Regards,nDhruvinnn