波浪对渤海近岸海冰冲击作用的数值模拟

海冰在波浪冲击作用下可能会发生断裂,通过数值模拟定量地描述波浪引起的海冰断裂对海工结构的运行安全以及分析海冰断裂处海水与大气之间的热交换有重要作用。该文利用建立的三维数值波浪水池,将海冰视为刚性平板,结合渤海冬季海冰、波浪的相关参数,研究海冰受波浪冲击的垂向冲击力、水平冲击力、弯矩和最大弯曲正应力随波高、冰长及冰厚的变化规律;并结合渤海海冰的弯曲强度,推断海冰发生断裂的极限参数,结果表明:在渤海海域某些特定条件下,海冰断裂极限波高、冰长和最小冰厚分别为0.504 m、4.273 m和0.098 m。

Numerical simulation of wave impact on sea ice in the Bohai sea

The fracture of sea ice may occur under the effect of wave impact.Describing the fracture of sea ice caused by wave quantitatively with numerical simulation methods is important to ensure the security of coastal structure and analysis the heat exchange between sea water and atmosphere where sea ice's fracture happens.First,a 3D numerical wave flume is developed,sea ice is regarded as rigid plate;then,the change rule is studied when vertical impact force,horizontal impact force,bending moment and maximum bending stress of sea ice changing with wave height,ice length and ice thickness;furthermore,referring to the bending strength of sea ice in the Bohai sea,limit parameters are analyzed when sea ice fracture occurs.The results show that the maximum wave height is 0.504 m,the maximum ice length is 4.273 m and the minimum ice thickness is 0.098 m under given conditions in the Bohai sea.