Simulation and analysis of SPH algorithm for interaction of aircraft tire-wet pavement
In view of aircraft hydroplaning on wet and slippery pavement,a finite element model of aircraft tire-wet pavement was established by using the smoothed particle hydrodynamics(SPH)algorithm and compared with the coupled Eulerian-Lagrangian(CEL)model,which highlighted the superiority of SPH algorithm.Then,the influence of different tire speeds and water film thickness on the interaction between tire and wet pavement was analyzed.The results show that the difference between the critical hydroplaning speeds obtained by the SPH algorithm model and the CEL model is less than 5%.The fluid characteristics such as bow wave and lateral plume are more obvious.The average computing efficiency of the SPH model is 36.5%higher than that of the CEL model.Then,the SPH model is used to analyze and get the following conclusions:the pavement supporting force decreases gently at first and then rapidly with the increase in speed.When the thickness of accumulated water is 3-13 mm,the speed range of the rapidly decreasing section is 170-260 km/h,which is basically within the landing and taxiing speed range of A320 aircraft,and the prevention of the risk of hydroplaning accidents should be strengthened.The displacement resistance increases at first and then decreases with the increase in speed,and the maximum value is obtained when the tire reaches the critical hydroplaning speed.Then,a method of determining the critical hydroplaning speed by using the maximum value of displacement resistance is put forward.The maximum splashing height of the lateral plume increases at first and then decreases with the increase in speed and reaches a maximum value when approaching the critical hydroplaning speed.The maximum splashing height of the bow wave is lower than that of the lateral plume and decreases with increasing speed.When the critical hydroplaning speed is reached,the bow wave almost disappears.The maximum splashing height values of both splashing characteristics are lower than the minimum ground height of 0.680 m for the A320 aircraft engine and will not affect the engine.
万方数据
维普
