Xian-ku ZHANG(张显库)， Ji-duan LI(李纪端)
Laboratory of Marine Simulation and Control, Dalian Maritime Uni versity, Dalian 116026, China
Abstract-The existence of thermocline changes the acoustic str ucture and effects the direction of the sound rays. This paper analyzes the work ing process of the active sonar, and the mathematical models. The detection prob ability of the active sonar under thermocline is studied. First, the detection d istance without thermocline is estimated, then the effect of thermocline’s dep th and sound velocity changes on detecting submarine probability are discussed, and based on this, the effects of the sea condition on searching submarine prob ability is discussed, lastly the distance of active sonar is calculated under th ermocline. The results indicate that under thermocline, the distance of the acti ve sonar becomes obvious short, and with the sea condition becoming rough, the e ffect is more clear.
Key words-thermocline; searching submarine effectivenes s; sea condition; the distance of detection
Manuscript Number: 1674-8042(2010)02-0108-04
dio: 10.3969/j.issn.1674-8042.2010.02.02
References
[1]Ren-he Zhang, 1981. Smooth-averaged sound field in shallow water. Acta Oceanologica Sinica, 3(4)：535-544.
[2]Qi-hu Li, 2002. Design Principle of Digital Sonar. Anhui Education Press.
[3]Xue-qiang Liu, Ri-jie Yang, Xu Zhou, 2008. Simulation research on the effects of thermocline on active sonar searching submarine. Journ al of Test and Measurement Technology, 22(1): 55-59.
[4]Dong-hua Gao, Xin-hua Zhang, 2001. Simulations of the effect of th e decision of vessel evasion on torpedo capture probability． Acta Sim ulata Systematica Sinica, 13(3): 348-349.
[5]J. H. Ferziger, J. R. Koseff, S. G. Moniismith, 2002. Numerical simu lation of geophysical turbulence. Computer & Fluids, 31(4): 5 57-568.
[6]Yong-ming Shen, Ya-kun Guo, Yong-hong Zheng, Zhen-hong Hu, 2008. Three-dimensionnal numerical simulation of nonisotropic thermal density flow i n a strongly curved open channel. Applied Mathematical Modelling, 32(10): 1956-1964.
[full text view]
