Article
Energy & Fuels
Jiajun Si, Lixian Zhou, Kuanjun Zhu, Hongyan Zhao, Bin Liu, Xiaoming Rui, Shengchun Liu
Summary: This paper investigates the dynamic response and buckling properties of the key tension plate in UHVDC transmission lines under ice shedding conditions, and evaluates the critical buckling value through laboratory tests.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Nan Wen, Bo Yan, Zheyue Mou, Guizao Huang, Hanxu Yang, Xin Lv
Summary: By studying dynamic response parameters and establishing prediction models, key parameters of transmission lines can be effectively predicted, providing an efficient means for designing electric insulation clearance and strength.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Engineering, Civil
Hong-Nan Li, Yu-Yan Wu, Xing Fu, Wen-Long Du
Summary: This study investigates the impact of ice shedding on the dynamic response of conductors using test models and a motion capture system. It concludes that the ice shedding velocity significantly affects the jump height of conductors. The findings provide guidance for the design and deicing of power lines.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Engineering, Mechanical
Wei Fan, Hui Ren, Weidong Zhu, Hao Zhu
Summary: In this work, dynamic analysis of power transmission lines with ice-shedding was conducted using an efficient absolute nodal coordinate beam formulation. The bending stiffness of the transmission line was found to be important in the dynamic analysis, as validated through practical applications.
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2021)
Article
Computer Science, Information Systems
Lv Zhongbin, Xiaohui Liu, Bo Zhang, Tao Yaguang, Fangyu Li, Li Qing, Bo Yan
Summary: By establishing models for electric power fittings, transmission lines, and tension insulator strings, the study focused on the maximum dynamic tension of conductors during ice coating and shedding processes. Results indicated that for isolated span transmission lines, the maximum dynamic tension of the conductor exceeded the static tension with conductor icing only when the ice-shedding section was small. In multi-span transmission lines, the maximum dynamic tension of the conductor approached or exceeded the static tension after conductor icing under any ice-shedding condition.
Article
Engineering, Environmental
Jean -Denis Brassard, Caroline Blackburn, Miklos Toth, Gelareh Momen
Summary: This study introduces a three-step controlled-environment laboratory procedure for evaluating materials to reduce ice accretion and prevent ice shedding on cable-stayed bridges. By testing four high-density polyethylene sheath configurations, the approach provides a simple means of evaluating geometric changes and surface modifications, including icephobicity.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Houjun Kang, Xiaoyang Su, Zihao Pi
Summary: The study explores the dynamic characteristics of a multi-cable-stayed shallow-arch model of a cable-stayed bridge under internal resonance, finding that support stiffness can reduce response amplitudes by absorbing energy to some extent.
NONLINEAR DYNAMICS
(2022)
Article
Energy & Fuels
Yi Wen, Yifei Chen, Jianrong Wu, Xianyin Mao, Huan Huang, Lin Yang
Summary: A risk assessment method for ice-shedding on 500 kV compact overhead lines is proposed in this study, with a focus on the effects of different spacer arrangements on suppressing ice-shedding. Results showed that proper spacer arrangement can reduce both mechanical failure and discharge risks of the line.
Article
Physics, Multidisciplinary
Jiaxiang Li, Biao Wang, Jian Sun, Shuhong Wang, Xiaohong Zhang, Xing Fu
Summary: The study suggests that the threat of ice shedding to the system should be considered in the design of transmission towers, especially the impact of ice-shedding height and span on the system.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Civil
Mohammad Rezaiee-Pajand, Mohammad Mohammadi-Khatami
Summary: Analyzing cable structures is a challenging task for civil and mechanical engineers due to their highly nonlinear behavior, with the dynamic relaxation method being one explicit procedure for analysis. This study evaluates the efficiency and suitability of six proposed stiffness matrices using 16 numerical examples and two criteria, ranking the methods based on the number of iterations and analysis time. The analysis reveals the best techniques and suggests benchmark problems for future studies in cable structures.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2021)
Article
Engineering, Environmental
Wen-juan Lou, Yue-long Zhang, Hai-wei Xu, Ming-feng Huang
Summary: This study investigates the coupling effects of wind action and ice shedding on the jump height of an iced conductor. Wind tunnel tests and numerical simulation were conducted to analyze the dynamic responses of a practical transmission line subject to joint actions of ice-shedding and wind. The study proposes an empirical formula for estimating the largest jump height, which considers the ice-wind joint effects and is validated through experimental and simulation data.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Prashant N. Kambali, Amirhassan Abbasi, C. Nataraj
Summary: This paper focuses on the nonlinear modeling and analysis of the COVID-19 pandemic. It explores the impact of vaccination and the observed oscillations in infections. By incorporating a nonlinear Susceptible, Infected, & Immune model with dynamic transmission rate and vaccination policy, the study analyzes stability, bifurcations, and dynamics using US data as a starting point. Further parametric analysis reveals the influence of imperfect vaccination on the occurrence of sustained epidemic equilibria. This work highlights the importance of systematic nonlinear dynamic analysis in pandemic modeling and demonstrates the significant influence of vaccination and transmission rate on the disease's persistent dynamics.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Mechanical
Han Fei, Deng Zichen, Dan Danhui
Summary: This study proposed a unified dynamic model considering factors such as cable sag, additional cable force, flexural stiffness, and support stiffness of lateral components for the first time, and used the dynamic stiffness method to investigate the dynamic characteristics of the multi-segment cable system. Results show that the position of lateral supports has a significant impact on the modes, and installing the supports equidistantly can achieve the maximum frequency value.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Vu N. D. Kieu, Shyh-Chour Huang
Summary: This study proposed a design model for a CDPR system, conducted kinematic and dynamic modeling of the system, and performed experiments to identify the dynamic modulus of elastic cables. A modified kinematic equation considering cable nonlinear tension was developed to determine the optimal cable tension at each position of the end-effector, and the wrench-feasible workspace was analyzed at various motion accelerations.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
R. Goodarzi, M. H. Korayem, H. Tourajizadeh, M. Nourizadeh
Summary: This paper models a novel moving cable-driven robot, taking into account the vibration of the cables in its nonlinear format. The study shows that modeling the cable's vibration as a nonlinear system leads to more accurate results.
NONLINEAR DYNAMICS
(2022)
