If your bed is vibrating, it could be caused by a number of things. The first thing you should do is check for loose parts. Make sure all screws and bolts are tight. If your bed has a headboard, make sure it is properly secured to the frame. If your bed has a footboard, same thing! Check to see if it is securely attached.
Another possible cause of vibration is an unbalanced load. This can happen if you have too much weight on one side of the bed or if something heavy is placed unevenly on the mattress. To fix this, simply redistribute the weight so that it is balanced across the entire surface of the bed.
Finally, another common cause of vibration is an imbalanced washing machine. If your washer isn't level, it can cause vibrations that will travel through your pipes and into your bedroom. To fix this problem, simply level out your washing machine using a spirit level or something similar. Once it's level, the vibrations should stop.