VIBRATION FATIGUE RESPONSE CHARACTERISTICS AND EXPERIMENTAL ANALYSIS OF A NEW TYPE OF INLINE JACKET FOR TRANSMISSION CONDUCTORS¹⁾

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.