在轴对称条件下 ,给出海冰板的环向屈曲临界载荷。从细观力学的观点分析了微裂纹开裂的条件、扩展方向并给出绕海洋平台柱腿冰的损伤区的尺度。所给出的临界半径是一个与冰材料力学特征 ,冰的微结构参数和海洋平台柱腿半径相关的特征参数。对现场所观察和测量的结果给出了解释和定量分析 Under axisymmetric conditions, the buckling critical load of the sea ice plate is given. From the perspective of mesomechanics, the cracking conditions of microcracks were analyzed, and the direction of propagation was extended and the scale of the ice damage around the ice column of offshore platform was given. The critical radius given is a characteristic parameter related to the mechanical properties of the ice material, the microstructure parameters of ice and the leg radius of the offshore platform. The results observed and measured at the site are given an explanation and quantitative analysis