横向振动条件下防振锤螺栓松动关键影响因素

A Study on Key Factors Affecting Bolt Looseness of Aeolian Vibration Dampers under Lateral Vibration Conditions

线夹螺栓松动导致的防振锤滑移问题普遍存在于架空输电线路中。为研究影响防振锤线夹螺栓松动的关键因素,分析了螺栓松动的主要原因,建立了横向振动条件下导线对防振锤线夹的激振力模型,在理论分析的基础上结合工程实际确定了影响螺栓松动的主要参数。通过正交试验获得各因素不同水平组合条件下螺栓紧固力矩的衰减值,并对其进行极差分析和方差分析,明确了各因素对螺栓松动影响的主次顺序、显著性及显著水平。结果表明,防振锤振动频率越高、振幅越大螺拴越容易松动,与工程实际相符,从而验证了所确定因素的关键性和合理性,可为工程实践提供理论和技术方面的支撑。

The aeolian vibration damper sliding caused by looseness of clamp bolts is commonly present in the overhead transmission lines.To study the key factors that affect the looseness of those bolts,the main reasons for bolt looseness are explored.A model of the excitation force of the cable on the damper clamp under lateral vibration conditions is established,and the main parameters that affect bolt looseness are determined based on theoretical analysis and engineering practice.The attenuation values of bolt tightening torque under different combinations of factors and levels are obtained through orthogonal experiments,and range analysis and variance analysis are conducted to clarify their order,significance,and significance level of the influence of each factor on bolt loosening.The experimental analysis results are consistent with the engineering practice,verifying the criticality and rationality of the determined factors,and providing theoretical and technical support for engineering.