Study on Simulation of Steady-state Sound Field Matrix in Complex Undersea Environment and Detection Sensitivity
* Presenting author
It's crucial to simulate the acoustic detective effect timely and accurately between any two positions in the complex undersea environment in a real-time simulation platform. A numerical analysis method of sound ray propagating in complex undersea environment based on the eikonal equation, non-coplanar sound ray and sound velocity gradient vector is presented in this paper. The total undersea concerned information under certain accuracy requirement can be obtained in the algorithm. The multidimensional sound pressure array is established to simulate the whole sound space. The calculated amount for the real-time simulation of the acoustic detective effect is decreased from O(mnu) by the traditional eigenray solution to O(1) (m is the number of the non-layered structures, n is the grid quantity of the local layered structure, u is the number of the iterations in Newton method or Runger Kutta method). The real-time capability is highly improved by the method mentioned above. By comparison, the results of the simulation and the marine measurement are in good agreement. The concept of detective sensitivity is proposed to quantitatively describe the relation among the marine environment, the detectors and the sound sources. The concept can give good expression of the relation among the three factors.