Rape is physical assault. So the question might be posed "how does a masochist experience physical assault". This phrasing I suggest makes construct weaknesses in the question becomes more apparent. What is a masochist, how is masochism experienced; are all masochists the same; is masochism a valid construct? It might also be posed that there is a difference between fantasies of sexual domination, or abasement, and life-style, behaviour or personality systems that seek to live out abasement, domination or pain (i.e. the difference between thinking about something and seeking to actually do it).
I'm afraid I can't attest to any structured research on the question, but I would guess that there is a major investigative problem in defining characteristics of masochism, then finding people with those characteristics who have been raped, and then getting them to speak of this in a way that would yield anything other than idiosyncratic data. And that is before the ethical question of whthter such investigation could ever be done in a non invasive way, were it possible to find a research population.