A study on structural damage of power cable jacket under external impact

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 122-127.

YANG Shiying1，ZHU He1，HE Wen2，YU Xin3，YUAN Ming1

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Abstract

It is common for cable jackets to be damaged due to cable construction and other power grid construction.Most of the damage is structural damage, and there is currently a lack of information on cable sheath structure damage.Infrared spectroscopy is an efficient and fast modern analytical technique that uses detectors to detect light through a cable sample (XLPE), identifying sample structure and composition information.X-ray diffraction techniques are often used to characterize the crystallization information of polyethylene and to determine the stress on the sample.Structural damage caused structural dynamic parameter changes, and the frequency response function curvature was used as the cable sheath damage diagnosis factor.The results show that the content of three by-products in the XLPE samples damaged by external force was different from that in the undamaged areas.The magnitude of the stress is related to the change in the interplanar spacing.The damage location and the curvature value of the perfect frequency response function were observed through experiments to determine the damage location.

Key words

cable sheath / infrared spectroscopy / X-ray diffraction / frequency response function curvature / damage location

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YANG Shiying1，ZHU He1，HE Wen2，YU Xin3，YUAN Ming1. A study on structural damage of power cable jacket under external impact[J]. Journal of Vibration and Shock, 2020, 39(24): 122-127

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