基于多体动力学的尾撬缓冲器动态性能研究

In order to obtain the energy absorption characteristics of tail skid shock absorber of civil aircraft, the systematic analysis method combining theoretical analysis, co-simulation and test verification was proposed. Firstly, based on the theoretical analysis model of shock absorber, a co-simulation model of shock absorberwas established, which included mechanical dynamics and hydraulic system. Then, the drop test was planned and implemented. The validity of the simulation model and the feasibility of the analysis method were verified by comparing the simulation and experimental results. Finally, the influence of key parameters such as different inflation pressure and height on the dynamic performance of the shock absorber was discussed in detail.The variation law of amount of work, maximum stroke and maximum axial force with relevant parameters were summarized. The analysis method and conclusion can be used to guide the design and selection of tail skid shock absorber, which has certain reference value for the flight test of civil aircraft.