摘要
为研究法兰胶装节点损伤与复合绝缘子套管动力特性变化的关系,以±800 kV复合绝缘子为研究分析对象,建立绝缘子及胶体有限元模型,并预设胶体高度方向和转角方向上的损伤影响因子,计算分析复合绝缘子损伤前后的动力特性。结果表明,复合绝缘子法兰节点处胶装层界面开裂及变形可能会导致整体结构刚度降低。法兰节点的弯曲刚度下降与法兰沿胶体的转角及高度方向上的开裂面积基本呈线性关系,胶体在法兰转角方向开裂面积与法兰节点本身的弯曲刚度面积下降的关系也近似为线性,振动方向的胶体破坏对法兰刚度影响最大。
In order to explore the relationship between glued flange joint damage and the change of dynamic characteristics of composite insulator bushing,the paper takes a±800 kV composite insulator as the research object and establishes the finite element model of insulator.Moreover,it presets the damage influence factors in colloid height and angle direction and calculates the dynamic characteristics of composite insulators before and after damage.The results show that the crack and deformation of the adhesive layer interface at the flange joints of composite insulators may reduce the overall structural stiffness.The decrease of the flange joint’s bending stiffness is linear with the flange’s cracking area in colloid height and angle direction.The decreased cracking area of the colloid in the height direction of the flange angle is also approximately linear with the reduced bending stiffness area of the flange joint.The colloid damage in the vibration direction has the most significant impact on the flange stiffness.
作者
邸悦伦
曹枚根
周曙琛
张若愚
DI Yuelun;CAO Meigen;ZHOU Shuchen;ZHANG Ruoyu(State Key Laboratory for Disaster Prevention and Mitigation of Power Transmission and Transformation Equipment,Changsha 410129,China;School of Civil Engineering,North China University of Technology,Beijing 100144,China;Jiangsu Shemar Electric Co.,Ltd.,Nantong Jiangsu 226599,China;School of Mechanics Engineering Science,Shanghai University,Shanghai 201900,China)
出处
《浙江电力》
2022年第7期63-69,共7页
Zhejiang Electric Power
基金
电网输变电设备防灾减灾国家重点实验室开放基金项目(B316AF190007)。
关键词
复合绝缘子
动力特性
法兰胶装节点
弯曲刚度
损伤因子
composite insulator
dynamic characteristics
glued flange joint
bending stiffness
damage factor
