Optimal Design And Analysis Of A Side-Opening Passenger Door Used For Airliner

The passenger door is an indispensible part of the plane,and it is one of the difficult points in airplane design,its importance is self-evident.The requirements of the airworthiness regulations on the door are numerous and detailed,which makes it difficult to design a passenger door.This paper finishes the design of the mechanism scheme of the door through the study of mechanism principle,parametric design of mechanism model and optimization of the mechanism parameters.And the kinematic and dynamic analysis of the results is carried out.On the basis of the mechanism scheme,the structure of the door is designed,and the strength analysis and weight reduction optimization design of the structure are carried out.In this paper,in view of a certain type of passenger aircraft,a side-opening door is designed by referring to the existing type of boarding gate.The door mechanism includes lifting linkage mechanism,handle linkage mechanism,locking mechanism and slide linkage mechanism.The detailed analysis and notes of the design are carried out,and parameterized modeling of the most complex core mechanism is accomplished.On the basis of parameterized modeling,the mechanism parameters are optimized by combining ISIGHT with MATLAB,the optimization contents include the motion trajectory,the mechanism interference,the structural force,the operating force and etc.The kinematics and dynamics analysis of the optimization results are also carried out,which verifies the reasonableness of the optimization results.Under the consideration of the requirements of stiffness,strength and seal,the structure of the door is designed by referring to the existing type of boarding gate.The weight reduction optimization of the preliminary design of the structure is finished by HYPERWORKS,which obtains a better result satisfied the design requirements of stiffness and stiffness.Finally,a complete 3D design model for the passenger door to meet the design requirements is formed.The 3D model is completed by the topdown standard design method of CATIA.