Research On Mechanical Performance Of Aerial Refueling Platform In Tanker Airplane

Air refueling is the process of transferring aviation fuel from one military aircraft to another during flight.The technology can significantly enhance the combat capability of military aircraft.Considering the complexity of flight conditions,the mechanical performance of aerial refueling platform has been one of the major directions of recent research.Finite element models were meshed for some aerial refueling platform which is the main research object.Hypermesh and Nastran were used to analyze models as finite element analysis pre-processing software and solvers.Finite element method was applied to study static strength and stability of the structure.Results showed that the mechanical performance of primary structure couldn't meet the requirements.According results,optimization scheme was put forward to improve mechanical performance.It was confirmed to be feasible after analysis.Brake of the platform was analyzed with multi-body system dynamic theory.The impact response of the structure under the force of brake was studied by combing the simulation result and finite element method.Calculated results showed that structure would stop in 0.1 seconds after brake.The platform was safe and reliable after optimization.Frequency response and acceleration response of the structure were studied by dynamic analysis.Fatigue mechanic of platform structure was studied with dynamic analysis and progressive damage law.Results showed the original structure couldn't meet requirements.An optimization scheme to solve the fatigue failure was put forward by finding out the reason why the structure will damage.The fatigue lifetime is 7140 hours after optimization.Mechanical performance of platform structure was study from static strength,stability,impact response and fatigue life.Conclusions obtained in this thesis can provide references for manufacturing and design of platform structure.