新型输电导线内嵌式接续管振动疲劳响应特性及试验分析

VIBRATION FATIGUE RESPONSE CHARACTERISTICS AND EXPERIMENTAL ANALYSIS OF A NEW TYPE OF INLINE JACKET FOR TRANSMISSION CONDUCTORS

为了研究新型输电导线内嵌式接续管振动疲劳寿命各种压接影响因素以及风振疲劳失效响应,在建立风振作用下钢芯铝绞线接续管疲劳响应数学模型的基础上,结合塑性流动法和强度因子法,使用COMSOL软件对不同压接对边尺寸下的钢芯铝绞线接续管的疲劳响应进行仿真和试验。研究结果验证了新型输电导线内嵌式接续管的可行性,与传统的接续管相比,新型输电导线内嵌式接续管能够提高压接的稳定性,有效降低接续管疲劳源区在微风振动作用下形成的动弯应力,减小导线的疲劳损伤。

Numerical simulation and experiment have been carried out to investigate the vibration fatigue life,various crimping factors, and wind-induced fatigue for the new transmission conductor built-in connection pipe.First, a mathematical model for the fatigue response of the steel core aluminum stranded wire connection pipe under the action of wind vibration is developed. Then the model is used to numerically simulate the fatigue response of the pipe under different crimping opposite sides, which is numerically solved with COSMOL by combining the plastic flow method and the strength factor method. The research results verify the feasibility of the new transmission wire embedded splice tube. Compared with the traditional splice tube, the new transmission wire embedded splice tube can improve the stability of crimping and effectively reduce the fatigue source area of the splice tube in the breeze vibration, the dynamic bending stress formed under the action, and the fatigue damage of the wire.