装配式冰场冰面受力性能的精细化模拟
摘要：为了探究装配式冰场冰面内置冰排架和冰排管时的真实受力性能，根据实际冰面构造和实测的材料特性，建立了冰面的有限元精细化分析模型，分析了冰排架和冰排管及冰排管内压对冰层承载力、刚度及应力场的影响规律。结果发现，冰层中内置冰排架及冰排管时，冰面承载能力和整体刚度仅会有1%～2%的小幅提高，并未像配筋一样起到显著加强承载力的作用。内置冰排架和冰排管不会显著影响冰层内水平应力场分布的均匀程度，但对Z向应力场产生影响较大，使冰排架边角处的冰层出现应力集中的现象。冰排管内压在0～0.2MPa的范围内变化对冰面的承载能力及刚度几乎没有影响，冰面制作时不用考虑冰排管内压影响。
关键词：2022年北京冬奥会；国家游泳中心；装配式冰场；人工冰面；受力性能；精细化模拟；
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Refined simulation on mechanical performance of prefabricated ice rink surface
Abstract: In order to explore the true mechanical performance of the built-in ice racks and ice row pipe on the ice surface of the prefabricated ice rink, based on the actual ice surface structure and measured material characteristics, a refined finite element analysis model of the ice surface was established and the influence law of ice rack, ice row pipe and internal pressure of ice row pipe on ice bearing capacity, stiffness and stress field were analyzed. The results show that when ice racks and ice row pipes are built into the ice layer, the load-bearing capacity and overall rigidity of the ice surface will only increase slightly by 1%～2%, which does not significantly enhance the load-bearing capacity like reinforcement. The built-in ice racks and ice row pipes will not significantly affect the uniformity of the horizontal stress field distribution in the ice layer, but have a greater impact on the Z-direction stress field, causing stress concentration in the ice layer at the corners of the ice rack. Changes in the internal pressure of the ice row pipe within the range of 0～0.2MPa have almost no effect on the bearing capacity and stiffness of the ice surface, and the effect of the internal pressure of the ice row pipe is not considered when making the ice surface.
Keywords: 2022 Beijing Olympic Winter Games; National Aquatics Center; fabricated ice rink; artificial ice surface; force performance; refined simulation
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