If you are referring to the study on - and perhaps optimization of - mechanical structures, you definitely need to take a few courses on the subject - without that you stand no chance of contributing.
If you in fact refer to something else, then you need to explain more.
Michael Patriksson Thank you for your explanation. I'll try to go up with a course. Actually i'm looking for the ways of mathematical modelling and behavior of concrete and steel structures with respect to vibrations.