Co-simulation Of Mechanical-Hydraulic Combined System And Analysis For The Damaged Aircraft Trailer

The damaged aircraft moving trailer is a necessary special vehicle for a large airport,which is mainly used for the aircraft to move away from the scene of the accident after a major accident,and to provide a guarantee for the normal operation of the airport.The suspension system is the core part of the trailer,and the cooperation performance of the mechanical and hydraulic system plays an important role in the bearing capacity and driving safety of the vehicle.Therefore,it is of great practical significance to study the collaborative simulation of mechanical system and hydraulic system.In this paper,the suspension system of the damaged aircraft moving trailer is taken as the research object,and the virtual prototype software ADAMS is used as the application platform.Based on the collaborative simulation analysis of the suspension system,the topology optimization of the suspension arm is studied from the aspect of improving the structural strength and lightweight.After the optimization of the structure,the dynamic characteristics of the trailer are studied.The main research work is as follows:First of all,the 3D model of the moving trailer suspension system is imported into ADAMS software,and then build the hydraulic principle diagram of the suspension system by using the software AMESim about hydraulic simulation,through the establishment of the interface module of the two software,the mechanical system and hydraulic system of the model are combined.At last,established the suspension system hydraulic co-simulation model,the dynamic parameters of the suspension arm are obtained.Secondly,put forward a new fractional power function method combined with guide weight method of topology optimization,the optimization results is better than that of commonly used engineering two interpolation model SIMP and RAMP,their optimization results are overly dependent on the penalty factor and the result is not clear.On the basis of the study of density interpolation theory,the criterion formula of minimum structural mass is derived under the constraint of displacement,and then this method is applied to the suspension arm topology optimization.Meanwhile,comparing with the method of guide weight criterion and Optistruct,results show that the algorithm is better.Lastly,by means of modal analysis,the natural frequencies before and after optimizationare compared.The results show that the antivibration performance of suspension arm is greatly improved.Then established the hydraulic co-simulation model of optimized suspension system,and the vibration curve of the trailer is obtained.Compared with the vibration characteristics of the trailer before and after optimization,it is shown that the vibration stability of the trailer is improved.