冰雹的数值模拟方法初探

冰雹的撞击对于飞机的整个结构存在着巨大的威胁，偶尔的一次遭遇冰雹袭击也是对飞机结构性能的严峻考验。由于实验测试需要投入大量的人力财力，因此，建立冰雹的数学模型显得尤为重要。目前所建立的数值模型主要有三种：有限元（FE）模型，任意拉格朗日一欧拉（ALE）模型和光滑粒子流体动力学（SPH）模型。首先论证了这些数值模型与实验测试结果吻合的情况，接着模拟了冰雹撞击飞机发动机进气道的过程，最后通过对这三种冰雹模型的比较，得出了SPH模型是分析冰雹撞击飞机问题的最有效、最好的模型的结论。

Methods of Numerical Simulation on Hailstone

Hailstone impact is an actual threat for the integrity of aircraft structures such as leading edges,and forward sections.Therefore,as experimental tests are both expensive and troublesome,it is important to develop numerical models,which eventually support the design of high-efficient and hail-proof structures.Accordingly,in the present research,using LSTC LS-Dyna,three numerical models of hailstone have been developed:finite element,arbitrary Lagrangian-Eulerian,and smoothed particle hydrodynamics model.In...