Identification of the key design inputs for the FEM-based preliminary sizing and mass estimation of a civil aircraft wing box structure

FEM-based preliminary structural sizing has been successfully carried out for a typical single-aisle wing box structure using MSC Nastran, by considering various load cases representing aircraft manoeuvres, engine loads, landing and ground handling conditions. The strength, buckling fatigue criteria have applied as the design constraints sizing. resultant total mass (static modal) behaviour of sized model verified against validated high-fidelity model. A sensitivity analysis performed to evaluate influence number fields selected inputs (i.e. constraints) on accuracy estimation box. This also extended static modal obtained from It provides an insight into significance constraints, rolling loads in sizing, addition commonly-applied 2.5 g pull-up under strength constraint. findings this study highlight trade-off between efficiency civil modelling purposes.