Numerical Simulation On The Characteristics Of Wave And Fixed Shore Ice Interaction In The Bohai Sea

Sea ice may break to smaller sea ice under the effect of wave.The accumulation of crushed ice may pose a threat to the safety of the structure.At the same time,it affects the heat exchange between seawater and the atmosphere at the location where fracture occurs,thus affecting the process of ice generation and consumption.Therefore,it is important to research on the characteristics of wave impacting on small-scale inshore fixed sea ice and the fluid-structure interaction between wave and sea ice,as well as describe the sea ice fracture caused by wave quantitatively.A numerical wave tank is established in FLUENT.The wave propagation process is simulated.The numerical simulation of wave impacting on plate is carried out and the simulation results are verified with experimental results.The elastic thin plate vibrates in static viscous fluid is studied with fluid-structure coupling technique and the results are verified with the results of literatures.They prove the effectiveness of numerical wave tank.The sea ice is regarded as rigid plate.The rule of vertical impact force,horizontal impact force,bending moment and bending stress of sea ice changing with wave height,ice length,ice thickness is obtained.Furthermore,referring to the bending strength of sea ice in the Bohai sea,the critical parameters are analyzed when fracture occurs.The study shows that:(1)when wave height and ice length increase,the absolute peak value of vertical impact force's increases linearly and the bending stress of sea ice increases as well.(2)Under given conditions,the sea ice of Nanpu town's critical fracture wave height is 0.504 m,the critical fracture ice length is 4.273 m and the critical fracture ice thickness is 0.098 m.The sea ice is regarded as elastic plate.A numerical fluid-structure interaction method is presented to study three-dimensional fluid-structure interaction characteristics between wave and fixed shore ice on small scale.The rule of structural response characteristics of sea ice changing with wave height is obtained;referring to the strength of sea ice in the Bohai Sea,the critical wave height and wavelength are analyzed when sea ice fracture occurs.The study shows that:(1)when wave height and wave length increase,the maximum of maximum principal stress,the maximum of maximum principal elastic strain and the absolute peak displacement of sea ice free end increase.(2)Under given conditions,the sea ice of Xingcheng's critical fracture wave height is 0.63 m and the critical fracture wavelength is 15.35 m.