Hello peter thanks for response, yes next time i will remember that.
The animation was from modal analysis
it was the boundary condition you told, what boundary condition i should apply than?
please i need your help

and also i should orient shell orientation in structure like in my project...i selected all bodies under shell orientation tab, than all faces, than one edge to give direction to x axis..but when i generate orientation message error tells:
The Element Orientation object has one or more elements whose computed edge guide axis and surface guide axis are parallel to each other.
The Element Orientation object has scoped edges that are not connected. The scoped edges have to be connected.

do i need selcet all girders seperately than deck and shell of this ship?