Hello Peter, you told in previous comment:
It's fine to apply displacements to points on beams, edges on shells and faces on solids.
I applied few days back vertical load on edge of shell element (in case of I rail on its top flange) It created stress singularity also.
Than I replaced I section rail made up of shell element to beam(line element) I section, than I applied point load, than it gave normal value
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