| 深海主跃层环境对会聚区影响的数值分析 |
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| 引用本文： | 王磊,王克平.深海主跃层环境对会聚区影响的数值分析[J].海洋测绘,2014(1):40-42. |
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| 作者姓名： | 王磊 王克平 |
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| 作者单位： | [1] 91550部队,辽宁大连,116023 [2] 海军海洋测绘研究所,天津,300061 |
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| 摘 要： | 应用BELLHOP模式,对声速剖面的声跃层结构变化引起会聚区偏移特征进行了分析。结果表明,声速垂直结构的变化可导致会聚区位置出现不同程度的偏移:跃层强度增加0.01 s-1将使会聚区向远离声源方向偏移1.5~2.0km;跃层厚度增大50m将使会聚区向靠近声源方向偏移0.3~0.5km;跃层位置加深100m将使会聚区向远离声源方向偏移0.5~1.0km。在跃层的三个特征量中,跃层强度起主导作用。跃层强度变化引起的声线在海洋次表层的偏折差异,进而导致进入深海等温层的入射角差异,是使会聚区发生偏移的决定性因素。
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| 关 键 词： | 声跃层 声速剖面 会聚区 BELLHOP模式 |
Varieties of Sound Propagating in Convergence Zone Caused by Sound Spring Layer |
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| WANG Lei,WANG Keping.Varieties of Sound Propagating in Convergence Zone Caused by Sound Spring Layer[J].Hydrographic Surveying and Charting,2014(1):40-42. |
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| Authors: | WANG Lei WANG Keping |
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| Institution: | 1.91550 Troops, Dalian 116023, China; 2. Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061, China) |
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| Abstract: | Based on BELLHOP model, the convergence zone（CZ） propagation was analyzed in conditions of sound speed profile （SSP） with different sound spring layer （SSL）. The results showed that different structure of SSL should account tbr the shift of CZ. The CZ was 1.5 - 2.0km shifted away from source corresponding to 0.01 s-1 increase of intensify of SSL,and 0.3 -0.5km shifted near to source corresponding to 50m increase of thickness of SSL,and 0.5 - 1.0kin shifted away from source corresponding to 100m increase of depth of SSL. In comparison,intensify was the dominating factor between three parameters of SSL. The change of intensify of SSL made ray beams refract to different extent in sub-surface, and reach deep isothermal layer with different angles,and finally resulted in shift of CZ. |
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| Keywords: | sound spring layer sound speed profile convergence zone BELLHOP model |
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