Modal Analysis and Life Estimation of Floor Beam Aircraft Structure

Floor beam is a structural part of a fuselage which is used as floor space to passengers, cargo and fixed with fuselage skin. Here, the cross beam has taken as I-section and connected with attach bracket methods of joining. The design of aircraft floor beam is conceptual design for the cost and weight reduction, strength improvement and ease of fabrication of fuselage. Increased weight and less stiffness of the existing floor beam made of aluminum is major problem of present floor beam. Hence, CFRP (carbon fiber reinforced plastics) has chosen for the designing of floor beam in the aircraft. After the selection of material and cross section of floor beam, the whole parameters of cross section of floor has studied and designed in UG NX8 software then the model is imported to Ansys 14.5 for the dynamic analysis and life estimation. The expected outcome is to reduce the weight to strength ratio, cost, increase the durability and life cycle of cross beam.