Development and experimental validation of smartphone-based tools to assess mechanical tension forces in guy wires of transmission towers

基于智能手机的工具的开发和实验验证，用于评估输电塔拉线的机械张力

• 批准号: 507631-2016
• 负责人: Bouaanani, Najib
• 金额: $ 5.04万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=645874
• 关键词: Development; experimental; validation; smartphone; based

Steel overhead towers are among the critical components of Hydro-Québec's extensive power transmission network. The tension within guy wires supporting power transmission steel lattice towers has to be regularly verified to ensure safe operation and adequate structural performance. The main objective of this research project is to develop and experimentally validate a quick, reliable and rigorous technique to measure the tension within guy wires using smartphones. Most promising available procedures for assessing tension forces within cables will be identified and applied to actual case studies of guyed lattice towers. Finite element models of guyed lattice towers will be built and used to perform dynamic analyses to evaluate the influence of most critical parameters contributing to wire tension force. Two types of smartphones will be selected depending on the operating systems (OS) and the programming environment. They will be used to implement analytical formulations for estimation of tension force in vibrating guy wires based on measured acceleration data. The tension force within guy wires tested in the laboratory will be assessed. The smartphone will be attached to the guy wire using a fastener designed specifically for this purpose. The acceleration time histories recorded by tri-axial accelerometers and smartphone during free vibration of the guy wires will be compared to assess the accuracy and potential limitations of the smartphone built-in accelerometers. The smartphone applications developed will be used to extract frequency data and predict actuator-controlled tension forces within the tested guy wires. The tension force in the guy wires of selected guyed towers will be assessed in-situ using the programmed smartphones and validated against load cell measures. User interfaces that enhance effective and quick operation of the developed smartphone applications will be programmed and tailored to the needs of end users. The proposed vibration-based technique will be implemented into Hydro-Québec's asset management programs. A user manual describing the smartphone application developed and a step-by-step illustration of its correct and effective use for different categories of guy wires will be provided.

钢制高架塔是魁北克水电公司广泛的输电网络的关键组成部分。为了保证输电钢格塔的安全运行和结构性能，必须定期对支撑钢格塔的拉线张力进行校核。该研究项目的主要目标是开发和实验验证一种快速，可靠和严格的技术，使用智能手机测量拉线内的张力。最有前途的可用程序评估电缆内的张力将被确定，并应用于实际案例研究的拉线格构塔。将建立拉线格构式塔架的有限元模型，并用于执行动态分析，以评估最关键的参数对钢丝张力的影响。根据操作系统（OS）和编程环境选择两种类型的智能手机。他们将被用来实现的张力估计在振动拉线测得的加速度数据的基础上的分析公式。将评估在实验室中测试的拉线内的张力。智能手机将使用专门为此目的设计的紧固件连接到拉线。将比较三轴加速度计和智能手机在拉线自由振动期间记录的加速度时间历程，以评估智能手机内置加速度计的准确性和潜在局限性。开发的智能手机应用程序将用于提取频率数据，并预测测试拉线内的致动器控制张力。将使用编程的智能手机在现场评估选定拉线塔的拉线张力，并根据测力传感器测量进行验证。将根据最终用户的需求对用户界面进行编程和定制，以提高所开发的智能手机应用程序的有效和快速操作。拟议的基于振动的技术将在魁北克水电的资产管理计划中实施。将提供一份用户手册，描述所开发的智能手机应用程序，并逐步说明如何正确有效地使用不同类别的拉线。