load definition

Hello ,

I have a worry, the model below represents the case of exceptional static loads  of a bogie  the model was made on Inspire, I wanted to know in fact on hypermesh which type of force I have to use because when I apply the force on one Node I have a very great constraint ,if I use the pressure I have a very small constraint. I used rigid elements also to bind nodes and apply the force to the master node but I do not know in all these assumptions which is the one correct. i 'am waiting for your help

regardly