Help with FEM analysis of model

I am enthusiast for futuristic desig of aeroplanes and are working on model of special beam. I am usnig FreeCad tool for design. Whit it I have managed to prepare the macro which enables me to paremterise the model. However I have issues preforming FEM analysis on it. My understanding of the FEM is limited, therefore I am looking for some outside help to sucessfuly analyse the model and see if the design mets the requirements.