{"title":"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","authors":"Yuzuru Eguchi , Yuki Okazaki , Hisato Matsumiya , Soichiro Sugimoto","doi":"10.1016/j.coldregions.2024.104309","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"228 ","pages":"Article 104309"},"PeriodicalIF":3.8000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Observational validation of a numerical model to simulate snow accretion on a transmission line conductor with moment of inertia and torsion compliance\",\"authors\":\"Yuzuru Eguchi , Yuki Okazaki , Hisato Matsumiya , Soichiro Sugimoto\",\"doi\":\"10.1016/j.coldregions.2024.104309\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>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.</p></div>\",\"PeriodicalId\":10522,\"journal\":{\"name\":\"Cold Regions Science and Technology\",\"volume\":\"228 \",\"pages\":\"Article 104309\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cold Regions Science and Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0165232X24001903\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cold Regions Science and Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0165232X24001903","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
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.
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.