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分析冰盖形成的热力学模型,推导出室内模型试验的相似比尺.模拟野外降温过程,在低温实验室内进行静冰压力模型试验,研究实验室模拟静冰压力产生过程的可行性.结果表明:实验室模拟最大冰厚39.8 cm,试验历时387.4 h,冰的冻结过程符合天然规律;实验室目前难以模拟融化过程中天然状态的太阳辐射,有待进一步改进降温制度.模拟试验的冰压力最大值出现在升温阶段,与温升率相关,温升率越大,静冰压力值越大;当环境温度升至0℃左右时,静冰压力达到最大值,随后迅速消散,符合水库冰过程观测结果.
The thermodynamic model of ice cap formation is analyzed and the similar scale of indoor model test is deduced.The simulated field cooling process is simulated and the static ice pressure model test is carried out in the low temperature laboratory to study the feasibility of laboratory simulation of static ice pressure generation.The results show that : The maximum ice thickness in laboratory simulation is 39.8 cm, the test duration is 387.4 h, and the freezing process of ice conforms to the natural law. At present, it is difficult to simulate the solar radiation in the natural state during the melting process in laboratory, and the cooling system needs to be further improved. Appeared in the warming stage, and the rate of temperature rise, the greater the rate of temperature rise, the greater the static ice pressure; when the ambient temperature rose to about 0 ℃, static ice pressure reached its maximum, and then quickly dissipated, in line with the reservoir ice process observation result.