Dynamic Analysis And Topology Optimization Of Aircraft Landing Gear Anti Torsion Arm

Aircraft landing gear is a device used for take-off,landing and taxiing,which plays an important role in the whole aircraft.However,the anti-torque arm structure of aircraft landing gear is easy to be damaged during landing,so it is extraordinary significant to improve the anti-torque arm structure.Most scholars mainly focus on the size optimization of the anti-torque arm structure,and few scholars conduct the topology optimization design.Even if some scholars carry out the topology optimization design,they only obtain the working conditions through theoretical calculation or use the test data obtained by predecessors as the working conditions.Few scholars implement topology optimization design for it.Even if some scholars carry out topology optimization design for it,they only obtain the working condition through theoretical calculation or use the test data obtained by predecessors as the working condition.Few scholars use the virtual prototype technology(Adams)to analyze the whole landing gear and get the working condition needed for topology optimization.In this paper,the three-dimensional solid of an aircraft running device of an airline is founded,and the falling earthquake simulation analysis model of the aircraft running device is founded based on the dynamic theory,and then the dynamic analysis is implemented,and then the topology optimization design of the anti-torque arm structure is implemented according to the working conditions obtained from the analysis results,and the corresponding explanation is made for the design results.Firstly,the structure of buffer device is introduced,and how the buffer device works is elaborate.The mechanical model of buffer device is built,and the dynamic differential equation of each member of the buffer device is obtained based on its mechanical model.Finally,the force of buffer is discussed.Secondly,it briefly recommends the ADAMS / view software,and describes how to set the working environment.The article discusses how to apply the motion pair,mentions the functions needed in the process of exerting the load,and determines how to exert the load.After finishing the above work,the virtual prototype model is simulated,the simulation results are analyzed and studied,and the variation law of torque and time of anti-torque arm is obtained.Thirdly,the cardinal thoughts and means of finite element are presented.The article analyzes the basis for selecting the materials,and analyzes how to mesh the landing gear and how to set the contact constraints of the landing gear components.And discusses how to exert the load to the anti-torque arm,then carries on the simulation calculation,and obtains that the anti-torque arm structure needs to carry on the innovative design.Finally,the article introduces the cardinal thoughts of topology optimization and analyzes how to select the fundamental means of topology optimization,and further expounds how to select the algorithm,and then builds the mathematical model of topology optimization based on variable density method.And how to determine the design domain and non-design domain of the anti-torque arm structure is described,and the simulation calculation of the anti-torque arm structure is implemented.After the emulation is accomplished,the anti-torque arm structure before and after optimization is contrasted.The research results show that the topology optimization results form a relatively clear contour,which can be used to process and manufacture the anti-torque arm structure after optimization.And the lightweight extent is distinct.Then,the rigidity and intensity of the anti-torque arm structure is checked.The simulation results show that the optimized anti torsion arm structure meets the requirements of the stiffness and strength design.