导线张力对防振器防振效果影响试验与数值研究

摘要

Aeolian vibration tests are designed and the vibration levels of the conductor with different magnitudes of the tension in the conductor,anti-vibration schemes,excitation frequencies and vibration magnitudes are tested to study the influence of the tension in the conductor on the damping effectiveness of the damping devices.The results indicate that the nature frequencies of the system are depended on the magnitude of the tension in the conductor and the changing law of the damping effectiveness with the magnitude of the tension varies in the Stockbridge dampers and the wire dampers.The degree to which the magnitude of the tension affects the performance of the damping devices varies with the anti-vibration scheme.Finite element models of the conductor and damping devices are established to find the initial form of the systems and the results are used in the harmonic response analyses.The FEM results match well with the law achieved in the experimental research.%为了研究导线中张力大小对不同防振装置的防振效果的影响规律,设计了导线微风振动室内模拟试验,测试不同张力大小、防振方案、激振频率和激振振幅的导线振动水平.试验结果表明,导线-防振装置体系的固有频率与导线中张力的大小有关,防振锤与阻尼线的防振效果随导线张力大小的变化规律有所不同;而且张力大小对防振装置防振效果的影响程度也因防振方案的改变而有所差异.建立了导线-防振装置体系的有限元模型,做找形分析,在找形的基础上进行谐响应分析.数值仿真结果与试验研究中得到的规律吻合较好.