Issue |
Mechanics & Industry
Volume 24, 2023
|
|
---|---|---|
Article Number | 41 | |
Number of page(s) | 11 | |
DOI | https://doi.org/10.1051/meca/2023039 | |
Published online | 04 December 2023 |
Regular Article
Fatigue life prediction of a piercing connector subject to breeze vibration and multi-field coupling
1
School of Mechanical Engineering, Hefei University of Technology, Hefei, PR China
2
State Grid Anhui Electric Power Co Ltd Electric Power Research Institute, Hefei, PR China
* e-mail: weiwang@hfut.edu.cn
Received:
10
July
2023
Accepted:
31
October
2023
Piercing connectors are widely used in power line erection. However, piercing connectors are susceptible to fatigue failure induced by wind load and multi-field coupling. Therefore, this study aims to predict the fatigue life of piercing connectors. First, the thermal-electrical-mechanical coupling model is created. Second, the electrical contact resistance (ECR) of piercing connectors is experimentally measured and converted into the heat generation rate (HGR) by the thermal equivalence method. Meanwhile, the breeze vibration load (BVL) of the conductor is calculated by the wind vibration theory. Then, the HGR and BVL are applied to perform the multi-field coupling calculation and fatigue life prediction. Finally, the effect of installation torque on the highest temperature, maximum stress, and fatigue life of piercing connectors is analyzed in detail. The results show that the ECR of piercing connectors decreases with the mounting torque, and ultimately tends to be stable. The highest temperature and maximum stress are located on the piercing blade, which is likely to become the failure origin. Within the allowable range of installation torque for piercing connectors, an optimal installation torque exists to minimize the maximum stress fluctuation and prolong the fatigue life.
Key words: Fatigue life / piercing connector / breeze vibration / multi-field coupling / electrical contact resistance
© Y. Feng et al., Published by EDP Sciences 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.