Studying characteristics of hydraulic bumper, including thin wall-orifice flow, spherical surface-slit flow and oil compressibility, sequentially gaining the overall characteristic of hydraulic bumper; 对液压缓冲器的各种特性,包括薄壁小孔流特性、球面缝隙流特性和油液的压缩性,进行研究计算,从而得到液压缓冲器的综合特性;