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假定冰厚为具有对数正态分布的随机变量 ,并考虑了冰的刚度、破碎长度及清除应力随冰厚的变化 ,建立了海冰与近海结构物动力相互作用的随机数学模型。以渤海 JZ2 0 - 2中南平台为例 ,采用简化的有限元模型进行了结构响应的计算 ,讨论了不同冰速与冰厚对平台结构响应的影响。
Assuming that ice thickness is a random variable with a logarithmic normal distribution, a stochastic mathematical model of dynamic interaction between sea ice and offshore structures is established considering changes in ice stiffness, crush length and stress with ice thickness. Taking the JZ2 0 - 2 platform in Bohai Sea as an example, a simplified finite element model was used to calculate the structural response and the effects of different ice velocities and ice thickness on the platform structure response were discussed.