基于船舶运动信息的航行海域海浪特性预报

以船舶自身为波浪测量仪,致力于采集方便而又尽可能少的船舶运动信号以提取航行海域实时海浪特性.由于估计中不依赖原始理论计算的传递函数,不需要附带波浪采集装置,而仅利用航行中船舶运动的观测序列完成海浪谱反演,故该海浪测量方法可适应船舶自身运动参数的变化.另一方面,由于反演估计的船舶运动频率响应特性,与事先计算或以其它实验方法得到的船舶运动频率响应特性得以比较,可以深化、修正对许多不易实时测量的海浪激励状态与船舶运动响应关系的认识,并积累船舶工程研究设计所必需的相关海域海浪谱信息.

The Prediction of Sea Wave Characteristics Based on Ship Motion Information

This paper presents a wave-measurement method for getting real-time characteristics of sea state in which ship is moving, assuming the ship itself as a wave-measurement instrument according to possibly few ship motion signals which are convenient to be collected. This method accomplishes the wave spectral deconvolution with the observation sequence of ship motions, not relying on the transfer function of original principle and not needing any wave-collection instruments, so it can adapt to variation of the ship motion parameters. Moreover, it will promote cognition of the relationships between the sea exciting state and the ship motion response which are hard to do real-time measurement in comparison with the frequency response characteristics of ship motions respectively obtained by the deconvolution estimation and the theoretical prediction or the other experimental methods, and it can also help to accumulate necessary wave spectrum information of related sea area for ship engineering research and design.