Experimental Study On Ice-wave-ship Coupling Resistance In Icy Areas

In recent years,with global warming,the polar environment has received more and more attention in scientific research.The waterway resources in the polar regions have been gradually developed,and the development of minerals and biological resources has gradually been used in a wide range of applications.Began to be more widely used.The polar environment is very complex,and there are various ice conditions such as floating ice,flat ice,and ice ridges.At the same time,there are still wind,wave and current loads in the floating ice area where the iceenhanced ship navigates.Therefore,in order to sail safely and improve efficiency,it is necessary to analyze and study the law of resistance and motion response of ice-enhanced ships under the coupling action of ice floes and waves.Existing research believes that the resistance performance and motion response law of ships will vary greatly according to different headings in waves.Therefore,heading is also one of the factors that must be considered when studying the law of ship-ice-wave coupling.In the current research on the resistance performance of floating ice,the analysis of shipice-wave coupling is relatively preliminary,and the influence of heading on ship-ice-wave coupling is not considered.Among the current mainstream research methods on the resistance performance of floating ice,the model test method is relatively mature and feasible.At the same time,the use of non-freezing model ice in a normal temperature pool is a more practical and feasible option in the floating ice resistance test method.For this reason,this article uses nonfreezing paraffin.The model ice simulates the icy areas of different sea conditions in a conventional towing pool with wave-making capability,and this phenomenon is studied through the ship-ice-wave coupling resistance test.First of all,this article conducted an experimental study on the ship-ice interaction in the icy zone.By comparing the time history curve with the ship-ice interaction,the main source and composition of the ice resistance of the ship under the condition of ice floe were determined,and passed The frequency of the flipping phenomenon changing with the speed of the ship in the experiment is counted,and the law of ice resistance is further analyzed.Then,this paper analyzes the ship-wave interaction that conforms to the wave parameters of the icy zone and finds that it is widespread down the sea.In the phenomenon of wave drag reduction,there are specific working conditions when heading against the waves,and the motion response of the ship is significantly intensified,and the resistance increases sharply;after that,this paper measures the motion response of a large number of sea ice in waves of different wavelengths,and compares them with the single Comparing the motion response laws of sea ice in waves,it is found that a large amount of sea ice exhibits irregular motion when the wavelength is shorter.When the wavelength is longer,the motion response law is similar to that of a single sea ice,but tends to be at a shorter wavelength.The original seismic oscillation;finally,the ship-icewave interaction was measured and analyzed based on the laws derived from the above research,and the research found that the ship-ice-wave coupling interaction and ship-ice interaction,ship-wave interaction There is a certain difference in mechanism.The motion of the hull caused by waves will reduce the increase in resistance caused by floating ice to a certain extent by changing the form of ship-ice contact.The wave resistance increasing component and the floating ice increasing resistance component in the total resistance exist.A certain hedging phenomenon cannot equate the total resistance with the simple addition of static water resistance,wave resistance increase,and floating ice resistance increase.In addition,factors such as wavelength,wave height,heading,and density of floating ice will all have an impact on the ship-ice-wave coupling resistance.