Equivalent Relationship between Cylindrical Charge and Spherical Charge for Underwater Explosion

Both cylindrical charge and spherical charge warheads are commonly used, so their underwater explosion performances attract more attention. However, the existing empirical formulas are only for spherical charge. To understand if the underwater explosion pressure field of cylindrical charge can be described by the empirical formulas for spherical charge, This paper qualitatively analyzes the influences of the orientation and the ratio of length to diameter on pressure field of cylinder charge underwater explosion, obtains a relationship expression of far field shock waves of cylinder charge and cycle charge by contrasting the pressure fields of cylindrical charge and same amount of spherical charge, and deduce an approximate empirical formula for cylinder charge by considering the empirical formulas for spherical charge. In addition, simulation is conducted to verify the accuracy of the deduced formula. This research may provide the basis for optimizing explosion performance of underwater warhead.