Method of positioning an explosion source for a floating shock platform sea trail

Abstract

In this paper, an improved shock wave zero time method is proposed to locate and calculate the explosion source of an offshore test on a floating shock platform. Based on the Kirkwood-Bethe theory of underwater explosive shock waves, the propagation characteristics of the shock wave are calculated, the zero time signal and pressure signal of the shock wave are measured, and the relative distance between the explosion source and each measuring point is calculated so as to improve the acoustic approximation hypothesis of the shock wave in the traditional explosion source location method. Considering the reflection of the shock wave on the wall, equations are established and solved to obtain the specific location of the explosion source. The test shows that this method can meet the requirements of explosion source location with good sensor data, and the dimensionless offset distance is less than 0.047 9. In the case of poor measurement accuracy of the individual data, relatively accurate positioning results can also be obtained, and the dimensionless offset distance is less than 0.127 5. The research results are beneficial to the calculation of the location of an explosion source on a floating impact platform in a real ship offshore test and can provide a basis for the subsequent correction of the numerical model.