US 11,954,806 B1
Polar navigation window period assessment system based on three-dimensional visualization simulation of ship-ice interaction
Guijie Shi, Shanghai (CN); Deyu Wang, Shanghai (CN); Wenjun Luo, Shanghai (CN); Chuntong Li, Shanghai (CN); and Jiaqi Jiang, Shanghai (CN)
Assigned to SHANGHAI JIAO TONG UNIVERSITY, Shanghai (CN)
Filed by SHANGHAI JIAO TONG UNIVERSITY, Shanghai (CN)
Filed on Nov. 4, 2023, as Appl. No. 18/501,998.
Claims priority of application No. 202310162955.6 (CN), filed on Feb. 24, 2023.
Int. Cl. G06T 19/00 (2011.01); G06F 3/01 (2006.01)
CPC G06T 19/003 (2013.01) [G06F 3/011 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A polar navigation window period assessment system based on three-dimensional visualization simulation of ship-ice interaction, comprising a virtual reality interactive operation module, a three-dimensional virtual visualization integration module, a three-dimensional simulation module of an Arctic route environment, an Arctic navigation virtual scene module, an Arctic navigation window period assessment module and a system storing and outputting module connected in sequence;
wherein the virtual reality interactive operation module is used for interacting with virtual reality scenes based on a VR handle and a VR helmet, and the virtual reality scenes comprise an internal view of a hull, a route environment scene and a navigation virtual scene;
the three-dimensional virtual visualization integration module is used for observing the virtual reality scenes using a global perspective;
the three-dimensional simulation module of the Arctic route environment is used for setting a route layer, a sea ice layer, a wave layer, a wind field layer and a dense fog layer to simulate the route environment scene;
the Arctic navigation virtual scene module is used for establishing the navigation virtual scene of a sea ice breaking process, a ship-ice collision interaction, ship resistance and structural response under sea ice, and a six-degree-of-freedom motion of the hull under the sea ice;
the Arctic navigation window period assessment module is used for assessing navigation window periods of a ship on different routes based on sea ice distribution information and sea ice forecasting information;
the system storing and outputting module is used for storing interactive operation information, virtual reality scene information and window period assessment result information, and outputting in forms of curve diagrams and data tables; and
the Arctic navigation window period assessment module is used for planning navigation routes of the ship and parsing AIS data of the ship to obtain longitude, latitude, speed, heading, ship type, MMSI, ice class and propulsion power information of the ship; assessing a comprehensive navigation risk in an ice area based on a sea ice density, a sea ice thickness, ship ice-resistance and ship propulsion power; and assessing the navigation window periods of the ship on the different routes based on sea ice distribution and sea ice forecasting information, and making an intelligent judgment on the navigation window periods based on machine learning;
wherein a formula for assessing the comprehensive navigation risk in the ice area is shown below:
RIOV=ΣCT×RSV,T+ΣCT×RPV,T
wherein CT is a T type ice condition in a region, RSV,T is a structural anti-ice risk level of a V type ship navigating in a T type sea ice area, and RPV,T is a structural propulsion risk level of the V type ship navigating in the T type sea ice area.