多段式拖曳系统低张力缆段隔振方法研究

为抑制拖曳系统中振动沿缆传递对搭载探测设备的影响,建立了多段式的拖曳系统的动力学模型,通过对拖曳系统阻尼成分的分类结合振动传递的衰减定性模型的定性分析。依据成因将缆阻尼分为张拉结构阻尼、水流阻尼和空间扭转阻尼;改变低张力缆与拖曳体组合的设计变量,采用强迫振动的方法,计算振动传递响应特性。设计变量驱动阻尼成分变化,造成了性质不同的响应系统,考察阻尼器设计安装的隔振效应,发现了共振激励现象。

A vibration isolation method of low tensional cables in a multi section towed cable system

A multi-section dynamic model was introduced to simulate vibration transfer in a towed cable system. The vibration isolation design was aimed to obtain stable towing. A qualitative model was built to describe vibration attenuation in the damping system with a brief summary of damping components in a towed cable system. The damp could be tensional structural damp, hydrodynamic damp and spatial curving and twisting damp according to their contributing factor. Transfer property was simulated under given forced vibrations with different design parameters. These parameters change the levels of towed cable damp with different system responses. Dampers were applied in the system. Resonance and secondary damp was found in the simulations.