模拟具有惯性矩和扭转顺应性的输电线路导体上积雪的数值模型的观测验证

IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Cold Regions Science and Technology Pub Date : 2024-09-04 DOI:10.1016/j.coldregions.2024.104309
Yuzuru Eguchi , Yuki Okazaki , Hisato Matsumiya , Soichiro Sugimoto
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引用次数: 0

摘要

我们开发了 SNOVAL 计算代码,用于对输电线路导线上的积雪进行数值模拟。在此,我们将介绍 SNOVAL 第 2 版的理论方面,例如基于积雪和导线扭转物理过程的模型方程推导,以及模型方程空间和时间离散化数学形式的推导。SNOVAL 的有效性是通过使用扇形模型设备获得的观测数据进行检验的,该设备旨在模拟实际输电线路中心的积雪和导线旋转。现场观测结果表明,SNOVAL 积雪模型是合适的,尽管 SNOVAL 的结果在很大程度上取决于某些计算条件,如粘滞效率、积雪密度和湿雪花的假定质量加权终端下落速度。最后,通过数值模拟导线旋转的动态行为,如装有配重的导线的卡穿现象,证明了 SNOVAL 适用于输电线路上的积雪。
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Observational validation of a numerical model to simulate snow accretion on a transmission line conductor with moment of inertia and torsion compliance

We have developed the SNOVAL computational code to numerically simulate snow accretion on the conductor wire of a transmission line. Here, we present the theoretical aspects of SNOVAL version 2 such as the derivations of the model equations based on the physical process of snow accretion and conductor wire torsion, and the derivations of the mathematical form of the spatial and temporal discretization of the model equations. The validity of SNOVAL is examined using observational data obtained using a sector model apparatus designed to mimic snow accretion and wire rotation at the center of an actual transmission line. Field observations indicate that the SNOVAL snow accretion model is appropriate, although the SNOVAL results depend strongly on certain computational conditions such as the sticking efficiency, the accreted snow density, and an assumed mass-weighted terminal fall speed of wet snowflakes. Finally, the applicability of SNOVAL to snow accretion on a transmission line is demonstrated via numerical simulation of the dynamic behavior of wire rotation such as the snap-through phenomenon of a conductor wire equipped with counterweights.

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来源期刊
Cold Regions Science and Technology
Cold Regions Science and Technology 工程技术-地球科学综合
CiteScore
7.40
自引率
12.20%
发文量
209
审稿时长
4.9 months
期刊介绍: Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.
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