Montader, as others have said ..there is no such thing as a silly question!
You are absolutely right about the centrifugal pump providing a smooth flow to the pump. This is actually the reason for the suction dampener - the triplex pump action doesn't actually take a smooth flow because the pistons are constantly moving back and forward and stopping. The dampener helps to deal with these small changes in flow.
I was able to find a great little video on You-Tube about the suction side dampener. You can find it here:https://www.youtube.com/watch?v=YkH9QNgUYKg
The video starts with a review of events leading to a fatality when HP nitrogen was used to recharge the bladder in a suction dampener.
The explanation on the use of the dampener starts at about 4:00 minutes into the video.
If your pump is fitted with a suction dampener it should really be in use and correctly charged.
Best wishes, Steve