基于接触模型的球头挂环仿真分析与优化方法研究

Research on simulation analysis and optimization method of ball head hanging ring based on contact model

球头挂环作为输电线路的关键部件,起到保证输电线路安全运行的作用。为了对球头挂环进行优化研究,在顺风向水平力作用下,基于Abaqus有限元软件对球头挂环进行了非线性静力仿真分析,通过建立2种不同型号的球头挂环接触模型,设置不同的网格密度、接触面宽度,接触类型采用面-面接触,讨论了球头挂环尺寸、网格密度和接触面宽度对最大应力的影响规律。计算结果表明,2种型号球头挂环在不同网格密度下的接触宽度与最大应力变化规律基本相同,最大应力值随着接触面宽度的增大而逐渐减小,可分为急速下降区、缓慢下降区、平稳区3个阶段。平稳区的最大应力及波动幅度均较小,可作为理想的球头挂环接触面宽度,其可为今后球头挂环的优化设计提供理论指导依据。

As a key component of the transmission line,the ball head hanging ring has great effects on the safety of transmission.In order to optimize the ball head hanging ring,under the action of the horizontal force along the wind direction,the nonlinear static simulation analysis of the ball head hanging ring was simulated through the finite element analysis,using the commercial software Abaqus.Two contact models for ball head hanging rings of different sizes,different grid densities,and different contact surface widths were established,with the contact type being face-to-face.The rules of influences of ring size,grid density and contact surface width on the maximum stress were discussed.According to the results,in the cases of different grid densities,the contact width and maximum stress of the two types of ball head hanging rings are almost the same.As the contact width increases,the maximum stress tends to decrease,which can be roughly divided into the rapid descent area,slow descent area,and stable area.In the stable area,the maximum stress and fluctuation range are small,which can be used as the ideal contact width of the ball head hanging ring,thus providing theoretical guidance for the optimal design of ball head hanging rings in the future.