Software for progressive failure analysis of transmission line structures under the action of downbursts and tornadoes

用于在下击暴流和龙卷风作用下输电线路结构进行渐进失效分析的软件

• 批准号: 516092-2017
• 负责人: ElDamatty, Ashraf
• 金额: $ 1.14万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697618
• 关键词: Software; progressive; failure; analysis; transmission

Downbursts and tornadoes belong to a category of localized windstorms that are called High Intensity Wind (HIW) events. Among structures that have suffered significant damage due to HIW events in the past are transmission lines. Because of their extended length, the probability of a tornado or a downburst hitting one of the towers, which supports such lines, is very high. Moreover, the failure of one tower can trigger the collapse of many towers in a domino effect. Researchers at Western University are taking the lead worldwide in the area of HIW events in general and the impact of such events on transmission line structures in particular. The research at Western started about 15 years ago through collaboration with Manitoba Hydro after the failure of 19 towers due to a downburst that occurred in 1999 near Winnipeg. Triggered by the failure of many Ontario towers, Hydro One Ontario subsequently funded the first phase of a related research program; this funding was leveraged by NSERC and the Ontario Center of Excellence. This research led to the only software available in the world that can predict the forces acting on a transmission tower and the response of such a tower to an HIW event. The first experiment in the world involving the testing of a multi-span transmission line system under downbursts was also carried-out in the project at the unique WindEEE facility. In the current study, the research will be taken to a higher level by considering the behaviour of entire line rather than that of an individual tower. The software will be further developed so that it will have the capacity to predict the progression of failure from one tower to another during an HIW event. This numerical development will be validated using a novel test to be conducted at WindEEE. The output of this research will provide Hydro One with unique tools that will allow that company to make the most optimum engineering decisions in either upgrading an existing line or in designing a new line in order to minimize the devastating losses associated with HIW events. Other North American utility companies will benefit as well. In fact, the impact will be global as the applicant serves on numerous international committees related to this subject.

爆炸和龙卷风属于一类局部暴风雨，称为高强度风（HIW）事件。在过去，由于HIW事件而遭受重大破坏的结构，是传输线。由于其长度的延长，龙卷风或撞击其中一条塔的爆炸的可能性很高。此外，一个塔的故障会触发多米诺骨牌效应中许多塔的崩溃。西部大学的研究人员在全球范围内在HIW事件的一般情况下，尤其是此类事件对传输线结构的影响。大约15年前，Western的研究通过与曼尼托巴水电的合作始于1999年在温尼伯附近发生的19座塔楼后与曼尼托巴水电的合作。由于许多安大略省塔楼的失败而触发，安大略省的Hydro One随后资助了相关研究计划的第一阶段。 NSERC和安大略省卓越中心利用了这笔资金。这项研究导致了世界上唯一可以预测作用在传输塔上的力以及这种塔对HIW事件的反应的软件。 在独特的Windeee设施的项目中，该项目还进行了世界上的第一个实验，涉及在上下爆发下进行多跨度传输线系统的测试。在当前的研究中，该研究将通过考虑整个线的行为而不是单个塔的行为来提高水平。该软件将进一步开发，以便在HIW事件期间可以预测从一个塔到另一座故障的进展。这种数值开发将使用在Windeee进行的新型测试来验证。这项研究的输出将为Hydro One提供独特的工具，从而使该公司能够在升级现有线路或设计新线路以最大程度地减少与HIW事件相关的毁灭性损失时做出最佳的工程决策。其他北美公用事业公司也将受益。实际上，由于申请人在与该主题有关的众多国际委员会中服务，因此影响将是全球性的。