上海交通大学硕士学位论文
III
ACTIVE ACOUSTIC DECOY ACOUSTIC
SIMULATION SYSTEM
ABSTRACT
The active acoustic decoy with the function of ‘receiving and sending’
is an important soft-kill weapon against modern intelligent torpedo. The
distortion of acoustic decoy receiving and transmitting signal influenced by
the near-field scattering sound field of the electronic cabin, and the leakage
signal from acoustic decoy's transmitting transducer to the receiving
hydrophone are the important factors which affect the performance of active
acoustic decoy in the mode of ‘receiving and sending’. Based on this, this
paper proposed a response signal simulation model which has considered
the acoustic scattering of the electronic cabin and the acoustic leakage
between the transmitting transducer and receiving hydrophone
，
and
developed an active acoustic decoy simulation system based on the
COMSOL platform.
Firstly, this paper proposes the overall design idea of active acoustic
decoy acoustic simulation system based on the working process of active
acoustic decoy. The functional requirements and main components of the
system are introduced. Then two key acoustic simulation methods of the
simulation system are introduced: the structural acoustic finite element
simulation method and the planar element algorithm. The electronic cabin's
near sound field excited by the detection signal of enemy active sonar and
the transmitting signal of decoy's transmitting transducer are simulated by
using COMSOL Multiphysics. By investigating the influence of scattering
sound field on the acoustic decoy's receiving and leakage signal, we find
that the electronic cabin has little influence on the received active sonar
signal, but has great influence on the leakage signal. In the next part, this
paper describes the signal simulation method of the simulation system,
