基于SPH方法的飞机轮胎滑水仿真分析计算

Simulation analysis and calculation of aircraft tire hydroplaning based on SPH method

轮胎滑水会导致轮胎与地面之间的摩擦力急剧减小,增加飞机起降距离,进而影响飞行安全,因而需要开展关于飞机轮胎滑水的研究。针对飞机轮胎滑水问题,采用FEM方法建立简化轮胎模型并通过实验进行模型验证,采用SPH方法建立积水模型,进而建立轮胎—积水—道面相互作用的轮胎滑水模型,分析不同影响因素和不同台面构型对轮胎滑水的影响。结果表明:水深越大,轮胎越容易发生滑水,但水深大于6 mm之后,水深对轮胎滑水的影响较小;轮胎速度、胎压、轮载越大,越容易发生滑水;沟槽宽度增加,轮胎滑水速度提高,但稳定性会降低;轮胎磨损越严重,越容易发生滑水;沟槽数量越多,临界滑水速度越大。

Aircraft tire hydroplaning can cause a sharp decrease in friction between it and the ground,increasing the takeoff and landing distance of the aircraft,and thus affecting flight safety.Therefore,it is necessary to carry out re⁃search on airplane tire hydroplaning.Aiming at the tire hydroplaning problem of aircraft tires,a simplified tire mod⁃el was established by FEM method and verified by experiments.A water model was established by SPH method,and finally a tire hydroplaning model with the interaction of tire,water and pavement was established.The influ⁃ence of different influencing factors and different tire configurations on tire hydroplaning was analyzed.The results show that,the greater the water depth,the more likely occur the tire hydroplaning,but after the water depth is greater than 6 mm,the water depth on the tire hydroplaning effect is small;The greater the tire speed,tire pres⁃sure and wheel load,the more likely the tire hydroplaning;With the increase of groove width,the tire hydroplaning speed increases,but the stability decreases.The more severe the tire abrasion,the more likely it is to tire hydro⁃planing;The greater the number of grooves,the greater the critical water skiing speed.