Good advice from Carolyn and although the other ideas might just work, I agree the duct tape might rip off some skin off the pads. Those little things from the pet store might be good but expensive by the time you cover your whole bed.
You can train your dog. Take her off the bed the instant she's up there or better yet when you see her getting ready to spring up, at the first intention. redirect her to her own bed which you can have on the floor. Have something for her...a doggie bed or some blankets and show her nicely what you mean. You don't need to scold her harshly...she doesn't know.
When she lies down there be sure to praise and even give a treat. Be very, very consistant and prevent her from getting on the bed. Everytime she does, that's a reinforcer for getting up there and she'll tend to repeat it. If you can't be there, then close the door and don't let her in. You have to be present to train her. The more reinforcers (praise, treats) she gets for using her own bed, the more she'll repeat that. But her own bed needs to be as comfy as you can make it so it's on par with the competition...(the bed) LOL. Good luck.