Method for establishing maritime distress target wind-drift model based on multi-source data

Abstract

The invention discloses a method for establishing a maritime distress target wind-drift model based on multi-source data. The method comprises the steps that S10, a maritime test range is designed, and a stereo observation network is established; S20, an unpowered floater is released in the range, and the drift velocity of the floater is calculated, wherein power factors of a sea area nearby the floater are continuously tracked and observed in a first time period of a test; S30, multi-source observation data is assimilated, a marine meteorology and power data reanalysis field with a high spatial-temporal resolution in a sea trial area is constructed in combination with a numerical simulation technology, and the wind-caused drift velocity of the maritime floater is decomposed; S40, on the basis of a wind-drift model fitting relation, displacement of the floater per unit time step is simulated, and a genetic algorithm is introduced to perform optimal solving on fitting wind-drift coefficients; and S50, a wind-caused drift forward vector diagram of the floater is drawn, and a relational model of motion characteristics of the maritime floater and maritime wind pressure is obtained. Through the method, continuous tracking and observation on an experiment target during sea trial are avoided, and test difficulty and cost are effectively lowered.

Description

technical field [0001] The invention relates to the technical field of trajectory prediction of floating objects in distress at sea, in particular to a method for establishing a wind drift model of a target in distress at sea based on multi-source data. Background technique [0002] In recent years, maritime activities such as resource development and transportation have become increasingly frequent, and maritime accidents have also occurred frequently. Maritime safety and environmental issues have drawn more and more attention from our country. Trajectory prediction of floating objects in distress at sea is an important technical support for maritime search and rescue decision-making system, and it plays an important role in ensuring the safety of my country's marine environment. The establishment of a wind drift model is the basis for the trajectory prediction of floating objects in distress at sea, and it is also one of the important tasks in building a trajectory predic...

AI Technical Summary

Problems solved by technology

[0003] However, there are relatively few domestic studies on establishing wind drift models for targets in distress at sea, and there is a lack of corresponding technical specifications

At present, the source of test data for establishing the wind drift model mainly comes from the tracking observation data during the sea test, which puts a great test on the operation and physical strength of the test personnel, and also increases the cost, so that it is difficult to obtain long-term and large-sample data. Test Data

However, the experimental data output by the direct numerical model lacks reliability.

At the same time, the wind drift models constructed by many domestic studies are too simple, without considering the anisotropy of surface wind speed and wind-induced drift

Images