Abstract: We investigate numerically refraction of shock waves at ferrum-beryllium (Fe-Be) interface. Equations of state for Fe and Be adopt "stiffen gas" formulas. A shock polar theory is employed to analyze critical angles of transition from regular refraction to irregular refraction. A shock-capturing method in finite volume scheme with two order of precision and wave propagation is employed to discretize and solve hydrodynamics equations of shock waves. For regular refraction, numerical results agree well with shock polar theory. For irregular refraction, precursory refracted shock waves are observed, and refraction images vary with shock intensity and incident angles.

Key words: Fe-Be interface, refraction of shock waves, shock polar theory, shock-capturing method, plecursory waves