基于FPM方法的入水问题数值模拟研究

Water entry of structures ,a highly nonlinear impact dynamic process , is widely used in maritimeand military fields. Ilt is very necessary to simulate this problem accurately and effectively. The finite parti-cle method (FPM) combined with the non-reflection boundary was adopted to simulate the problem of wa-ter entry. 'The vertical force , the velocity and the pressure of two-dimensional wedge were analyzed andcompared with the results of the literature to verify the effectivity of this method.'The factors for the prob-lem of water entry were also studied in this paper.The effects of size , shape , initial velocity and mass onvertical force , velocity and pressure at different time were analyzed. It is shown that the mechanical proper-ties of the structure are affected by the bottom angle of the wedge , the shape of the structure , the initial ve-locity and the mass , which has a reference for the design of the water-entry structure.