how to apply a force on a sphere

[F_Ingrasciotta]

Honestly, the division into 4 spikes I don't understand it, you have to do a buckling analysis, so defined a plan that passes through a diameter of the sphere you define two more parallels to this. the two identified floors divide the sphere into two domes (small as you want) and the central part of the shell.
at this point on one of the domes apply the bond on the other the load.. .

 

[Stan9411]

I advised him to tell the truth .. he spoke of point of application. If you want a point on a ball, you have to make the four ears.

all here..

then it is clear that defining areas of application of the load and the bond is definitely more realistic

 

[F_Ingrasciotta]

I advised him to tell the truth .. he spoke of point of application. If you want a point on a ball, you have to make the four ears.

all here..

then it is clear that defining areas of application of the load and the bond is definitely more realistic

I had lost it, surely with the 4 spikes creates a summit on which to apply loads and constraints but of counter generates singularity in the solution.

However if even creating the 4 spikes fails to give constraints/loads is a matter of selection.