Sublimation of composite ice and its influence on performance of ice shells

Q1 Arts and Humanities

International Journal of Space Structures Pub Date : 2021-03-01 DOI:10.1177/09560599211011863

Yue Wu, Junkai Huang, Jiafeng Chen

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引用次数: 3

Abstract

The long-span ice composite shell structure is a new type of ice and snow structure developed in recent years. The engineering practice of ice composite shell shows that sublimation is one of the important reasons for its damage and even collapse. In this paper, we firstly supplemented the existing H-K equation and obtained the revised ice sublimation equation through indoor evaporative plate experiment considering the influence of admixtures and wind speed. Afterwards, combining the simulations of solar radiation and CFD, the numerical simulation of sublimation distribution on the surface of were realized by programming in Grasshopper platform. During sublimation, the thickness of the ice composite shell decreases by 0.38 mm every 10 days and the sublimation rate on the sunny side was 1.7 times that on the shady side. Finally, the static performance and stability of the sublimated ice composite spherical shell were analyzed. After 70 days of sublimation, the thickness of the ice composite shell structure becomes thinner and uneven, which leads its sensitivity to external load increases.

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复合冰的升华及其对冰壳性能的影响

大跨度冰复合壳结构是近年来发展起来的一种新型冰雪结构。冰复合材料壳的工程实践表明，升华是其破坏甚至坍塌的重要原因之一。本文首先通过室内蒸发板实验对现有的H-K方程进行了补充，得到了考虑外加剂和风速影响的修正冰升华方程。随后，结合太阳辐射模拟和CFD，在Grasshopper平台上编程实现了表面升华分布的数值模拟。在升华过程中，冰复合壳的厚度每10天减少0.38 mm，阳面升华速率是阴面升华速率的1.7倍。最后，对升华冰复合材料球壳的静态性能和稳定性进行了分析。经过70 d的升华，冰复合壳结构厚度变薄且不均匀，导致其对外部载荷的敏感性增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Space Structures Arts and Humanities-Conservation

CiteScore

2.00

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to provide an international forum for the interchange of information on all aspects of analysis, design and construction of space structures. The scope of the journal encompasses structures such as single-, double- and multi-layer grids, barrel vaults, domes, towers, folded plates, radar dishes, tensegrity structures, stressed skin assemblies, foldable structures, pneumatic systems and cable arrangements. No limitation on the type of material is imposed and the scope includes structures constructed in steel, aluminium, timber, concrete, plastics, paperboard and fabric.