Improved cable dynamics modeling for computer aided design of towed array sonar

改进的拖曳阵列声纳计算机辅助设计的电缆动力学建模

• 批准号: 488316-2015
• 负责人: Nadler, Ben
• 金额: $ 1.82万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586196
• 关键词: Improved; cable; dynamics; modeling; computer

Towed array sonar systems (towed arrays) consist of sensitive low-frequency hydrophones mounted on long submarine cables that are towed behind surface vessels. Towed arrays either listen for faint sounds beneath the sea surface, or emit sound and listen for reflected signals. In either mode, accurate measures of the signal time of arrival at the acoustic transducers allows the operator to triangulate the location of the signal origin. However, knowledge of the towed array dynamics must be applied when processing the acoustic signals and this knowledge is not trivial to acquire or predict; the length of the system, the complex hydrodynamic forces that deform the system and the large transient internal system motions all complicate operation of a towed array. To drive computer-aided design (CAD) of towed arrays, advanced computer models of the towed array dynamics are needed that can predict, or simulate, the movements of the towed array for various array constructions and across the full range of projected operating conditions. Such models allow ocean engineers to investigate how the array structural mechanics impact the acoustic signal processing, and how the surface vessel can be used to actively position the sensor array. In this project an advanced capacity for CAD of towed arrays will be developed which will significantly reduce the execution time. While existing software can already be directly applied to simulation of a towed array system, the simulation execution speed needs to be significantly accelerated so that the computational tool executes as fast as engineers can interpret the output. If this acceleration can be achieved the advanced capacity for CAD of towed arrays could be marketed to towed array technology developers.

拖曳阵列声纳系统（拖曳阵列）由安装在长 拖在水面船只后面的海底电缆。拖曳阵列要么倾听水下微弱的声音， 海面上，或发出声音，并听取反射信号。在任何一种模式下，信号时间的精确测量 到达声换能器的时间允许操作员对信号源的位置进行三角测量。 然而，在处理声学信号时必须应用拖曳阵列动力学的知识， 要获得或预测这些知识并不容易;系统的长度，复杂的水动力 使系统变形和大的瞬时内部系统运动都使拖曳系统的操作复杂化 阵 为了推动拖曳线列阵的计算机辅助设计（CAD）， 对于各种阵列，需要能够预测或模拟拖曳阵列的运动的动力学 施工和整个范围内的预计操作条件。这些模型使海洋工程师能够 研究阵列结构力学如何影响声学信号处理，以及表面如何 容器可以用于主动定位传感器阵列。 在这个项目中，将开发拖曳阵列计算机辅助设计的先进能力，这将大大减少 执行时间。虽然现有的软件已经可以直接应用于拖曳阵列的仿真 系统，仿真执行速度需要显着加快，使计算工具 执行速度快到工程师可以解释输出。如果这种加速能够实现先进的能力 用于拖曳阵列的CAD的软件可以销售给拖曳阵列技术开发商。