Research On Rigid-flexible Coupling Model And Dynamic Characters Of Carrier-based Aircraft Arresting System

Aircraft arresting system is one of the important auxiliary equipment on the aircraftcarrier, and it is the key equipment of ship for ensures the aircraft landing safe. The aircraftlanding on the aircraft carrier, which from the aircraft tail hook hanging cable to completelystop on the deck only needs3-4seconds. Arresting system absorbed huge kinetic energy ofthe aircraft and converted into heat in a very short time. Therefore, the working state ofarresting system will directly affect the aircraft landing performance indicators, such asstopping distance, overload and arresting force.At present, research on arresting system abroad mainly adopting the method of theoryanalysis and empirical data, has formed a mature research system. The domestic study onarresting system is still in the initial stage, the research on the dynamic characteristics ofaircraft arresting system generally adopts the method of theoretical analysis, withoutconsidering the elastic properties of arresting cable (including arresting cable andtransmission cable), the arresting cables and arresting mechanism coupling on the dynamiccharacteristics of arresting system. Thus lead many important features of the arresting systemunable obtain a more precise quantitative analysis to its dynamic characteristics and there is abig gap with actually. Multibode system dynamics for solve the multi-dimensional,time-varying, nonlinear dynamics problem provides an effective theoretical analysis method;therefore, it has important theoretical and practical engineering value for study therigid-flexible coupling system dynamics of aircraft.This paper discusses the rigid-flexible coupling dynamic theory, and put forward the ideato establish rigid-flexible coupling dynamics model of aircraft arresting system with flexiblemultibody dynamics method. Considering the influence of aircraft tail hook impact on cableand cable vibration on the process of arresting, the flexible cable model is constituted bydiscrete beam elements. The model does not consider the beam bending, torsion andcompression properties, only considering the tensile properties of beam element. Aircraftarresting system through the cable which winding in the support and guide pulley transferaircraft kinetic energy. The model using penalty function method to solve the contact betweenthe cable and pulley body, and between the movable pulley block rollers and inner/outerraceway contact/impact problems.Taking MK7-3arresting system as an example, the three-dimensional finite elementmodel of arresting system is established. According to the simulation test of aircraft hanging on cable, comparing the simulation data of related parameters and the actual experimentaldata, verify the correctness of the model. Simulation based on test data to analyze thedynamic characteristics of the model, research aircraft stopping distance, overload and cableforce relationship in the parameters. The fluctuation of theory and simulation test combined,to analyse the wave propagation in the cable, and stress wave reflection and transmission onthe deck pulley. The process of moving block movement, and the influence of cable slack toarresting system working condition.In aircraft arresting process, due to the different aircraft types, aircraft mass and landingspeed is great difference. In order to ensure the safety of aircraft landing, it is need to adjustthe arresting device blocking ability to adapt to different state of aircraft landing. In the paper,a detailed analysis of the working principle of fixed run out system of MK7-3arresting device,theoretically derived from the joint control of the cutting area of the poppet valve and camprofile, and analyzed for the same kind of landing state aircraft, adjust the weight value of theselector, the influence of fixed run out system on the arresting system dynamic characteristics.While analysis the influence of the deck pulley buffer system and the end buffer system toarresting system.The aircraft landing on the centrality is an ideal arresting situation, but in actual processof arresting landing,the aircraft more or less off-center or yaw. This paper is based on thefinite element model of the arresting system, to analysis the dynamic characteristics ofarresting system in these conditions. Including the dynamic characteristics of the aircraftlongitudinal and transverse, and the deck pulley buffer system dynamic characteristics.