#### Topic: Some questions about Boundary loads

Hi all,

I have some questions about Boundary loads,So I wish someone would help me,thank you first!!

All I know so far is how do I add a constant load to a plane that is orthogonal to the x or y or z axes

such as: ConstantSurfaceLoad 2 loadTimeFunction 1 Components 3 0.0 0.0 500 loadType 3 ndofs 3

Whether the parameters behind "Components" represent the load sizes in the three directions of x,y and z respectively.In this case,whether it means the load magnitude in the x and y directions is 0, and the load pressure in the z direction is 500pa ?Is my understanding correct?

Q1:How do I add load to those load which are not orthogonal to the axes x ,y and z.How should i set the parameters behind "Components"?I'm going to decompose the force in the x,y, and z directions?Could I directly set the direction of the load perpendicular to the plane?

Q2:How do I add load to surface,For example, I want to add an internal pressure to the inner wall of a ball or load to the surface of a hollow cylinder.

All I know is how do I add load to the plane but I did not know how to deal with the surface.Just like Round and cylindrical.

The most important question I think：How could I directly set the direction of the load perpendicular to the plane?

I uploaded a salome file, and I just want to know how to add load to Group_2 from inside out perpendicular to the inside wall?

Looking forward to your reply！Thank you!!!