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

拖曳阵列声纳系统(拖曳阵列)由安装在Long上的灵敏低频水听器组成 拖曳在水面舰艇后面的海底电缆。拖曳的阵列要么监听下面微弱的声音 海面，或发出声音并倾听反射信号。在任一模式下，信号时间的准确测量 到达声换能器的位置允许操作员对信号源的位置进行三角测量。 然而，当处理声信号时，必须应用拖曳阵列动力学的知识 这些知识的获取或预测并不是微不足道的；系统的长度、复杂的水动力 使系统变形和大型瞬时内部系统运动都使被拖车的操作复杂化 数组。 为了推动拖曳阵列的计算机辅助设计(CAD)，拖曳阵列的先进计算机模型 需要能够预测或模拟各种阵列的拖曳阵列的运动的动力学 在所有预计的运行条件下，都可以进行施工。这样的模型使海洋工程师能够 研究阵列结构力学如何影响声信号处理，以及表面如何 舰船可以用来主动定位传感器阵列。 在这个项目中，将开发一种先进的拖曳阵列CAD能力，这将显着减少 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 系统中，需要显著加快仿真执行速度，以便计算工具 执行的速度与工程师解释输出的速度一样快。如果能够实现这种加速，先进的产能 对于拖曳阵列的计算机辅助设计，可以向拖曳阵列技术开发商销售。

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.