Abstract: A novel pressure-conducted velocity probe was developed to continuously measure the propagation traces of detonation wave and near-field shock wave in a single underwater explosion test. An underwater explosion measuring system with the new probe for spherical charge was designed. The repeated experiments of 120 mm-diameter spherical RDX charge were performed, and the time-history curves of several sets of detonation-shock waves were measured in the experiments. The detonation velocities of RDX explosive under test were obtained by fitting the detonation and shock wave data, respectively, and the detonation pressure, adiabatic exponent, and attenuation rule of underwater shock wave were calculated from the time-history curves of detonation-shock waves, which were compared with the calculated results of Kamlet semi-empirical formula and the numerically simulated results. The results show that the relative errors of the measured and calculated detonation velocity, detonation pressure and adiabatic exponent are not more than 3%, 5% and 2%, respectively. The simulated peak pressure and propagation velocity of near-field shock wave are basically in agreement with the experiments, of which maximum errors are less than 10%. Key

Key words: sphericalcharge, underwaterexplosion, continuouspressure-conductedprobe, near-fieldshockwave, numericalcalculation