水分侵入对复合绝缘横担FRP/RPUF界面影响的有限元及分子动力学仿真研究  

Finite Element and Molecular Dynamics Simulation of Influence of Water Intrusion on FRP/RPUF Interface of Composite Insulated Cross Arm

作　　者：李敏 田浩男 刘麒 谢军 LI Min;TIAN Haonan;LIU Qi;XIE Jun(State Grid Baoding Power Supply Company,Baoding 071000,China;Department of Electric Power Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网保定供电公司,河北保定071000 [2]华北电力大学电力工程系,河北保定071003

出　　处：《电工材料》2024年第6期10-14,共5页Electrical Engineering Materials

摘　　要：复合横担在高压输电工程中广泛应用,近年来却多次发生水分侵入导致包含FRP/RPUF界面的复合横担失效事故。为此结合有限元仿真、分子动力学仿真获得了水分侵入下复合横担界面劣化机理:初期水分在内外浓度差的驱使下侵入材料内部,逐渐达到饱和后,吸水以通过氢键重组的方式与界面的亲水基团结合的化学吸湿为主;随后由于界面在长期界面失配应力以及化学分解等作用下产生了裂纹、细缝等水分子团簇通过通道,水分主要通过这类通道侵入复合绝缘横担内部。Composite crossarm is widely used in high-voltage power transmission projects,but in recent years,there have been many failures of composite crossarm containing FRP/RPUF interface due to water intrusion.Therefore,this paper combined finite element simulation and molecular dynamics simulation to obtain the deterioration mechanism of the composite cross arm interface under water intrusion:at the beginning,water invaded the interior of the material under the drive of internal and external concentration difference,and after reaching saturation,water absorption was mainly through hydrogen bond recombination and chemical hygroscopic bonding with the hydrophilic groups at the interface.Subsequently,due to the interface mismatch stress and chemical decomposition,cracks and other water molecular clusters were generated through the channels,and the water was mainly intruded into the interior of the composite insulated cross arm through these channels.The results of this paper are of reference significance for clarifying the damage mechanism of water on the interface of the composite crossarm and improving the performance of the composite crossarm.

关 键 词：有限元 分子动力学 复合横担 水分侵入 

分 类 号：TM247[一般工业技术—材料科学与工程]