With global warming, the range of sea ice and the thickness are decreased. Polar geophysical vessels need to travel to polar regions and other open seas every year. The resistance of the geophysical exploration ship in polar seas will increase due to the ice environment, and the towing operation of the geophysical exploration ship will also be affected by this condition. Therefore, it is of great significance to carry out ice load analysis and parameter sensitivity research on the geophysical exploration ship working in the ice floe environment. In this paper, the empirical formula is used to calculate the ice load on the towing cable. At the same time, the numerical curve of the ice load over time is obtained through finite element simulation. Finally, the influence of sensitivity parameters (density and thickness of ice crushing) on the towing cable is analyzed. Numerical simulation is carried out for the navigation of geophysical exploration ship in the ice breaking area to analyze the change trend of ice load under different ice breaking density and thickness.
In the Arctic human development report signed by Arctic countries, it is pointed out that the development and transportation of polar oil and gas in the future will play a decisive role in the economic development of the adjacent Arctic region and play an important supporting role in the sustainable development of the world economy and society. According to the assessment report issued by USGS, the Arctic region has 13% of the world's unproved oil reserves, and the reserves of undeveloped natural gas and coal resources account for 30% and 9% of the world's total reserves respectively (Bird et al., 2008). According to the report of the National Snow and Ice Data Center (NSIDC), the annual reduction rate of Arctic sea ice area is 3.5%. The reduction of sea ice area provides many favorable conditions for oil exploitation, so more and more ships in the ice area enter the Arctic sea area. However, the natural environment in the Arctic area is still poor, and ships are greatly affected by the ice load. Because polar geophysical exploration ship operation needs to go back and forth to polar sea area and other open sea areas every year, the floating ice environment and different ice conditions under the ice conditioning environment in polar sea area will also have a great impact on ship resistance. Resistance will affect the towing capacity of polar geophysical exploration ship operation, which has a great impact on the economy and efficiency of geophysical exploration ship. In recent years, the research on ice load is mainly focused on icebreaker and offshore platform.
