舰船与主被动拖曳线列阵声呐六自由度耦合运动特性及变化机理研究

Active and passive towed line array sonar as an effective equipment to detect quiet submarines are used widely in the world navy , however, due to the waves, currents, ship maneuvering and oscillation, the influence of such factors as distortion caused the towed line array system, the stability of the towed body attitude and working depth, affect the operational performance of the towed system in the wartime seriously. The kinetic characteristics distortion of the active and passive towed line array sonar are complex scientific problems. In order to overcome the inherent problems of automatic matching boundary condition by using the existing pseudo coupling or local coupling modeling method, the project will build and perfect nonlinear motion theory of multi-bodys system, such as the complex "rigid body-flexible body-rigid body”, and "rigid body-flexible body” system. The six degree of freedom coupling dynamic model of warship and active and passive towed line array sonar will be established. A numerical solution algorithm for high - dimensional nonlinear equations will be proposed. Based on numerical calculation results and actual ship test data, and the theoretical model is tested and modified. The motion response characteristic of the ship and the active and passive towed line array towed sonar will be analysised. The changing mechanism of the towed line array shape distortion, the towed body water attitude and working depth, ship maneuvering and seakeeping will be explored. The research results will provide a theoretical reference for the real-time accurate estimation of towed line array, to the improvement of the overall technical performance and operational performance.

主被动拖曳线列阵声呐作为探测安静型潜艇的利器，然而由于受到波浪、海流、舰船机动与摇荡等因素的影响，极易发生拖曳线列阵阵形畸变、拖曳体水中姿态和工作水深稳定性变差等问题，严重恶化其探测性能。针对主被动拖曳线列阵声呐运动特性畸变的复杂科学问题，项目将构建与完善复杂条件下“刚体—柔性体—刚体”“刚体—柔性体”组合方式的多体系统非线性运动理论，克服现有的运用伪耦合或局部耦合关系进行建模，而无法自动匹配边界条件的固有问题，建立舰船与主被动拖曳线列阵拖曳声呐六自由度耦合作用动力学模型；提出一种适用于该模型的高维非线性方程组数值求解算法，并基于数值计算结果和实船测试数据对理论模型进行检验与修正；系统地开展舰船与主被动拖曳线列阵拖曳声呐运动响应特性分析，探究拖曳线列阵阵形畸变、拖曳体水中姿态和工作水深、舰船操纵性和耐波性等运动特性的变化机理。研究成果可为主被动拖曳线列阵拖曳声呐技术性能的提升奠定理论参考。

本项目针对波浪、海流、舰船机动与摇荡等因素作用下主被动拖曳线列阵声呐运动特性产生畸变的复杂科学问题，建立了舰船与主被动拖曳线列阵声呐六自由度耦合边界匹配条件，构建了舰船与主被动拖曳线列阵拖曳声呐六自由度耦合作用动力学模型，建立了高维非线性方程组的数值求解算法，研究了舰船与主被动拖曳线列阵拖曳声呐运动响应特性，探究了海浪、海流、舰船机动与摇荡等情况下，拖曳线列阵阵形畸变、拖曳体水中姿态和工作水深等运动特性的变化机理。目前，已经应用该程序算法对我海军主被动拖曳线列阵声呐的运动响应特性进行了详细的分析，服务于我海军主被动拖曳线列阵声呐作战使用研究，对于提升我海军主被动拖曳线列阵声呐的作战性能发挥了重要作用。