The Denmark international midfielder told fulhamfc.com: "As soon as I heard Fulham were interested in me, I wanted to join. It's always been my dream to come and play in England and now it's been realised. I've got to work hard because everything over here is a bit bigger and faster - but I like to work hard.
"I've only heard positive things about the Manager. I've been playing with some players who knew him and they only say good things about him. Of course that also played a part in me signing. Everyone has been friendly and has taken good care of me so that's a nice beginning."
Andreasen is well aware of the Club's current Premiership position but is looking forward to the challenge of guiding the Whites to Premiership safety.
"It's going to be tough but in my opinion Fulham doesn't belong where we are now," he said. "If I can do anything to help I will be happy. I'm prepared to give everything I have for this Club."