水下多分枝拖曳线列阵刚-柔-液耦合多体系统非线性随机动力响应研究

Combining theoretical research with numerical simulation, a theoretical and numerical simulation model of underwater multi-branched towed array multi-body system which is non-smooth, non-linear，three-dimensional，full coupling ,dynamical analysis is established. This model is aimed at: exploring modeling techniques for forward and inverse problems of underwater towed linear array hydrodynamics ; researching the relations of underwater multi-branched towed array dynamics tension, dynamics configuration and system dynamics stability; studying the stochastic dynamical extreme response for underwater multi-branched towed array multi-body system; examining comprehensively the effects of surface ship manipulation or submarine space mobility on related parameters of underwater towed combination system with flexible body, formation of multi-body system and motion under deep and far ocean environmental conditions; developing more stable and efficient numerical analysis method and corresponding calculation software. This paper also studies comprehensively the VIV effects of snap load caused by multi-body system, system configuration and dynamic stability, further enriches the stiffness-flexibility-liquid coupling theory of multi-body system describing by high order lumped parameter approach, discusses the efficient design standards, puts forward method avoiding destructive load of mutation in system. The study can provides necessary theoretical basis to overcome fuzzy problem of target's port/starboard existing in single-line array, and realize three dimensional accurate location of underwater target.

拟采取理论研究和数值模拟相结合的研究方法，建立水下多分枝拖曳线列阵非光滑、非线性、多体系统三维全耦合动力分析的受力和运动数理模型。探索水下拖曳线列阵流体动力学的正问题和反问题的建模技术；研究水下多分枝拖曳线列阵动态张力、动态构型与系统动力稳定性的关系；进行水下多分枝拖曳线列阵多体系统的随机动力极端响应研究；全面考察深远海环境条件下水面舰艇操纵运动或潜艇空间机动对水下拖曳多挠性体组合系统相关参数、多体系统阵型和运动的影响；研究开发更加稳定高效的数值分析方法及其相应的计算软件；从机理上全面考察涡激振动对多体系统激发突变载荷、系统构型、运动和动力稳定性的影响；进一步丰富和完善用高阶凝集参数法描述的多体系统刚-柔-液耦合作用的理论，探讨有效设计准则，提出如何避免在系统内产生破坏性突变载荷的方法，为克服单线阵所存在的目标左右舷模糊问题和实现水下目标的三维精确定位提供必要的理论依据。

拟采取理论研究和数值模拟相结合的研究方法，建立水下多分枝拖曳线列阵非光滑、非线性、多 体系统三维全耦合动力分析的受力和运动数理模型。探索水下拖曳线列阵流体动力学的正问题和反问 题的建模技术；研究水下多分枝拖曳线列阵动态张力、动态构型与系统动力稳定性的关系；进行水下 多分枝拖曳线列阵多体系统的随机动力极端响应研究；全面考察深远海环境条件下水面舰艇操纵运动 或潜艇空间机动对水下拖曳多挠性体组合系统相关参数、多体系统阵型和运动的影响；研究开发更加 稳定高效的数值分析方法及其相应的计算软件；从机理上全面考察涡激振动对多体系统激发突变载 荷、系统构型、运动和动力稳定性的影响；进一步丰富和完善用高阶凝集参数法描述的多体系统刚柔-液耦合作用的理论，探讨有效设计准则，提出如何避免在系统内产生破坏性突变载荷的方法，为 克服单线阵所存在的目标左右舷模糊问题和实现水下目标的三维精确定位提供必要的理论依据。